Personally I find any spaghetti bowl pleasing xD
But seriously, what are the most original intersections you've ever seen?
The Albany circle stack. Insanely overbuilt, but it looks really nice from above.
And before somebody mentions Breezewood, it's not particularly original as it's far from the only place like that.
Saw this old picture of the Autobahn. Love this early attempt at an interchange.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.autobahn-online.de%2Fimages%2Fhist10.jpg&hash=00db2498767117533758b3d0b5472a6cd8b1cb4e)
^ Basically a standard partial cloverleaf with all ramps on the same side–with the exception of that little "I changed my mind" lane bridging the off-ramp and on-ramp. A situation likes this exists (https://goo.gl/maps/ULvBNcd1EHN2) at a number of partial cloverleafs (cloverleaves?) in California where a bus pad has been added between a pair of ramps, but besides those, does anyone know of any other interchanges where an unrestricted bypass lane connects the off-ramp to the on-ramp like that?
Quote from: cl94 on February 26, 2016, 11:26:56 PM
And before somebody mentions Breezewood, it's not particularly original as it's far from the only place like that.
While the basic premise of Breezewood (toll road doesn't connect with free Interstate, forces traffic to exit onto a surface street in order to make the connection) isn't very unique , I know of no other interchange that utilizes a one full trumpet, one three-quarter trumpet, and a bypassed mile-long portion of a former mainline alignment (which continues over ten miles further in abandonment) to connect two roads–and also veers across a disused trumpet along the way.
Quote from: briantroutman on February 27, 2016, 01:19:22 AM
Basically a standard partial cloverleaf with all ramps on the same side–with the exception of that little "I changed my mind" lane bridging the off-ramp and on-ramp. A situation likes this exists (https://goo.gl/maps/ULvBNcd1EHN2) at a number of partial cloverleafs (cloverleaves?) in California where a bus pad has been added between a pair of ramps, but besides those, does anyone know of any other interchanges where an restricted bypass lane connects the off-ramp to the on-ramp like that?
A little hard to tell in this Google Maps view (since it was made during bridge replacement) but eastbound I-94 at Woodward Avenue (M-1) in downtown Detroit has a quick and fairly sharp curve on the exit ramp to incorporate a re-entry lane. I wonder if it was built as a pull-off for cops to sit and monitor traffic. Road debris has accumulated over the years so nobody uses it. I find it interesting that MDOT retained it, at least until the freeway is reconstructed, when the Woodward bridge was replaced last year.
https://goo.gl/maps/9W9aecMocYF2
MDOT also built a few Crash Investigation Sites on I-94 in metro Detroit several years ago, at least one or two of which allow motorists to return to the freeway.
https://goo.gl/maps/4SMbcZBszW72
New Jersey has plenty that are still from the old 1930's era on some roads. Heck, there are plenty of traffic circles still in use that were built several decades ago.
In Florida most interchanges in Orlando (the city) are still the same until the ultimate I-4 reconfigures them.
The most original I like is this one at 130 & 168. https://goo.gl/maps/DvZYnPsqt262 It requires left turning traffic to keep left of opposing thru traffic.
Based on historic aerials imagery, it was built between 1951 & 1956, and prior to that was an elongated jersey traffic circle. On occasion, in some other state, they'll build something very similar to it, and in almost every news story it's written up as "This has never been done before". But 6 decades ago, NJ, just outside of Camden, truly had the original.
I don't know about original, but for some reason I always like the totally elevated traffic light at I-535/I-35/US 53 in East Duluth:
https://www.google.com/maps/@46.764681,-92.1239102,120m/data=!3m1!1e3
I don't know whether it's "original" or "unique," but I've always found the interchange between I-395 and King Street in Alexandria, Virginia, to be a rather different layout that works pretty well. I guess the best description would be a modified cloverleaf that eliminates the weave areas.
https://www.google.com/maps/@38.8346395,-77.0975806,887m/data=!3m1!1e3
Confusion corner, here in Winnipeg:
https://goo.gl/maps/nCq2iL8A98w
Wikipedia:
https://en.wikipedia.org/wiki/Confusion_Corner
(https://farm6.staticflickr.com/5747/20859838491_ac772a130b.jpg) (https://flic.kr/p/xMj8eM)
Northbound Osborne St approaching 'Confusion Corner' (https://flic.kr/p/xMj8eM) by Sign Geek (https://www.flickr.com/photos/135438121@N07/), on Flickr
I don't know if this is anything special, but I think the intersection of US-60, 35th ave. and Indian School road in Phoenix is pretty interesting:
https://goo.gl/maps/2Q3EeudHoYR2 (https://goo.gl/maps/2Q3EeudHoYR2)
I actually find the Seven Corners intersection near Falls Church, VA to be interesting. Yeah, I know some of you who live near it find it a nightmare unless you are on US 50, but the way all the streets come together is interesting.
The High Five, because now that the Texpress lanes in there turns it into confusion. I love confusion with interchanges (I created a large spaghetti bowl in Cities: Skylines and even I have no idea where the ramps go).
Quote from: authenticroadgeek on February 26, 2016, 09:18:58 PM
Personally I find any spaghetti bowl pleasing xD
But seriously, what are the most original intersections you've ever seen?
Just to clarify, you mean the most creative or inventive designs for intersections (and interchanges)? (As opposed to the oldest ones still in service.)
Personally, I like the huge I-96/I-275/I-696/M-5 (nee M-102, nee Bus-96) interchange in Novi. Just seeing how it changed over the decades when it pretty much was when 1 freeway was added at a time.
Another interchange which intrigues me is the junction of I-70 and I-77 in Cambridge, OH, which was the largest interchange in the world as late as 1969 according to the ODOT State Highway Map. The "helix" in the middle of the "diamond" looks graceful from above:
https://www.google.com/maps/@39.9970842,-81.5595985,1279m/data=!3m1!1e3
I-70 and I-77 is similar to I-96/US-23 near Brighton, MI, at least before it was reconfigured ...
https://www.google.com/maps/@42.5249372,-83.7537886,1690m/data=!3m1!1e3
The 405/520 interchange north of Bellevue, Washington is decently unique, though not for the right reasons. One of the heaviest directions could use a flyover, instead of the woefully inadequate loop currently in place (WB to SB). Some directional ramps for the 405 express lanes could help as well. Props to WSDOT for winding the NB to WB ramp back and forth all over the place, though -- it's as fun to drive as it would seem to be.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FzcEVsz5.png&hash=ea5b705590a0a6551d1c9dd8b1730bb0f40c5017)
The I-41/Watertown Plank Road interchange in Wauwatosa, WI.
https://www.google.com/maps/@43.0453777,-88.0358245,18z/data=!3m1!1e3
The I-94/M-10 interchange in downtown Detroit is totally obsolete by modern design standards, but still looks graceful from above. I've never seen another interchange use left-hand exits and entrances to this extent.
https://goo.gl/maps/DeYLo1Si7q82
The Van Dyke Avenue/18 1/2 Mile Road/M-53 interchange in Sterling Heights. Hold on tight when driving the ramp from the roundabout to northbound M-53. This interchange is not that old (built within the last decade) and I'm surprised the design passed muster.
https://goo.gl/maps/aDn9tWRTrdx
Quote from: roadman65 on February 27, 2016, 06:49:29 PM
I actually find the Seven Corners intersection near Falls Church, VA to be interesting. Yeah, I know some of you who live near it find it a nightmare unless you are on US 50, but the way all the streets come together is interesting.
Heh, I thought about mentioning that one but decided my comment would be so profanity-laden that it'd be better to let someone else mention it. :-D
https://www.google.com/maps/place/Myrtle+Beach,+SC/@33.7396863,-78.9540016,612m/data=!3m1!1e3!4m2!3m1!1s0x890068953b552101:0xbc0fb115b5d09618!6m1!1e1
Speaking of original I do not think this one will ever be copied
Quote from: roadman65 on February 28, 2016, 10:53:31 AM
https://www.google.com/maps/place/Myrtle+Beach,+SC/@33.7396863,-78.9540016,612m/data=!3m1!1e3!4m2!3m1!1s0x890068953b552101:0xbc0fb115b5d09618!6m1!1e1
Speaking of original I do not think this one will ever be copied
Except it copied an interchange in metro Detroit. This interchange was nearly identical (https://www.google.com/maps/@42.2628846,-83.2712176,1454m/data=!3m1!1e3) before it became a SPUI. This site (http://www.weathergraphics.com/tim/dumbroad/design.htm) has a satellite image of the old one.
For intersection, I'm sticking with the bridgeless single point in Topeka, KS: Aerial view. (https://www.google.com/maps/@39.0442994,-95.6818975,211m/data=!3m1!1e3?hl=en)
I am waiting for the day New Jersey comes in with one like that using four jughandles at each corner of the intersection.
I cannot see NJ using the full SPUI's full time in addition to the the NJ 133 and NJ 33 intersection in East Windsor, NJ. I for sure do not see NJDOT adopting a DDI either, unless someone in Trenton decided that its time for a change recently.
Quote from: roadman65 on February 28, 2016, 01:11:18 PM
I am waiting for the day New Jersey comes in with one like that using four jughandles at each corner of the intersection.
You mean an at-grade cloverleaf? Toms River (https://www.google.com/maps/@39.9784548,-74.1821455,467m/data=!3m1!1e3)
Quote from: cl94 on February 28, 2016, 01:19:10 PM
Quote from: roadman65 on February 28, 2016, 01:11:18 PM
I am waiting for the day New Jersey comes in with one like that using four jughandles at each corner of the intersection.
You mean an at-grade cloverleaf? Toms River (https://www.google.com/maps/@39.9784548,-74.1821455,467m/data=!3m1!1e3)
No one that has the ramps coming in from the four corners into the middle of the intersection. Almost like what US 22 at Washington Avenue in Greenbrook used to have for the U turn going WB but have the left turn go into the intersection. At the former Greenbrook intersection you still had to travel to the end of the ramp at Washington to make the left.
Hey they still might do a SPUI with jughandles for the traditional ones someday, as it would still have three phases for the signal as only the left turn queue would be only replaced with the right side ramp. They already have a reverse jughandle at NJ 70 and NJ 73 in Marlton for one of its movements with the jughandle tying into a ramp of NJ 73 to avoid a left turn lane under the NJ 73 overpass. Anything is possible.
Quote from: empirestate on February 27, 2016, 07:30:07 PM
Just to clarify, you mean the most creative or inventive designs for intersections (and interchanges)? (As opposed to the oldest ones still in service.)
Yes, the most creative designs.
The Garden State Parkway, US 9, and NJ 440 in Woodbridge Township, NJ is certainly original.
Quote from: jakeroot on February 28, 2016, 04:39:23 AM
The 405/520 interchange north of Bellevue, Washington is decently unique, though not for the right reasons. One of the heaviest directions could use a flyover, instead of the woefully inadequate loop currently in place (WB to SB). Some directional ramps for the 405 express lanes could help as well. Props to WSDOT for winding the NB to WB ramp back and forth all over the place, though -- it's as fun to drive as it would seem to be.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FzcEVsz5.png&hash=ea5b705590a0a6551d1c9dd8b1730bb0f40c5017)
That NB to WB ramp was put in about the early 1990s, if I remember right. It used to be a loop in the NE quadrant. I think they were adding a lane to 405 at the same time. Back then, 520 east of 405 got very little traffic.
The Squirrel Hill interchange is pretty unique (https://goo.gl/maps/PPHvULGt1sm). At the mouth of the tunnel, it's also very antiquated and not conducive to smooth traffic flow (especially during heavy traffic times), but with it's "wrong-way" overpass and entanglement of ramps, it's certainly original.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi1182.photobucket.com%2Falbums%2Fx444%2Ftha_professor1%2FSq_Hill_Intge.jpg&hash=1127282b38a8b066f7a68c235c15f75b98b2922c)
Quote from: kkt on February 28, 2016, 02:00:15 PM
Quote from: jakeroot on February 28, 2016, 04:39:23 AM
The 405/520 interchange north of Bellevue, Washington is decently unique, though not for the right reasons. One of the heaviest directions could use a flyover, instead of the woefully inadequate loop currently in place (WB to SB). Some directional ramps for the 405 express lanes could help as well. Props to WSDOT for winding the NB to WB ramp back and forth all over the place, though -- it's as fun to drive as it would seem to be.
http://i.imgur.com/zcEVsz5.png
That NB to WB ramp was put in about the early 1990s, if I remember right. It used to be a loop in the NE quadrant. I think they were adding a lane to 405 at the same time. Back then, 520 east of 405 got very little traffic.
After checking out historical aerials, it appears that the loop that was removed was the EB to NB movement, replaced by a flyover in the 90s (the sat-shot below is 1990). The NB to WB ramp has always been a back-and-forth movement, evidently. In addition, the NB to EB movement originally used the SB to EB loop (merging into the loop about halfway through). I think the original design was even more unique then the current one.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FovW9RxS.png&hash=fa6eaa72752de41208351896c67d102f43736592)
Yes, thank you.
CT 17 at New London Turnpike (https://goo.gl/maps/GWXqNiSTkCJ2), Glastonbury, CT.
New London Turnpike used to be CT 2 (then had a short swan song as SR 582 before being turned over to the town). That's the reason for the semidirectional SB to EB ramp.
Not sure it's the most interesting but, when I was a kid (obviously before internets), I recall being really interested in the Orange Crush interchange, before I knew it was called Orange Crush, but it took a few years before I finally got a detailed enough map to show how the ramps were configured. And it didn't disappoint when I finally saw it.
https://www.google.com/maps/@33.7811973,-117.8798148,16z
I may have a picture of it but, when I lived in Shanghai in the late 90's, and they were building the Outer Ring Road, they put up a billboard showing the proposed interchange with Yanan West Road and it was, by far, the craziest thing I'd ever seen. Somewhere along the line, they obviously changed the design, because what they built isn't really very interesting by most standards.
https://www.google.com/maps/@31.1841595,121.3574529,16z
Nine Ways Roundabout in Kingsford, New South Wales
https://goo.gl/aeFKRJ (https://goo.gl/aeFKRJ)
This intersection was noteworthy for me since my father had an accident there in 1994. He has an inherent disliking for this particular intersection - he is still hesitant today to drive through that intersection again!
Not the most original, but this Y intersection with a missing leg causes a lot of head-shaking. To go from US 9W NB to NY 32 SB (westbound on Delmar By-Pass, which is a ridiculous facility: Four lanes, wide median and yet traffic lights far too often to justify it -- you speed up to 55 just to get stopped at a red light), you take Plank Road and then go through a traffic light to essentially do a U-turn.
Two words: Circle Interchange (https://www.google.com/maps/@41.8748715,-87.6444645,589m/data=!3m1!1e3)! :)
Speaking of interchanges that utilize circles:
https://www.google.com/maps/@40.5260436,-74.3381799,16z
Quote from: Rothman on February 29, 2016, 07:54:35 AM
Not the most original, but this Y intersection with a missing leg causes a lot of head-shaking. To go from US 9W NB to NY 32 SB (westbound on Delmar By-Pass, which is a ridiculous facility: Four lanes, wide median and yet traffic lights far too often to justify it -- you speed up to 55 just to get stopped at a red light), you take Plank Road and then go through a traffic light to essentially do a U-turn.
It's just a jughandle
Indiana Toll Road/I-65/US 12/US 20/Assorted local roads: https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3 (https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3)
I think this deserves a mention: I-90 (Mass Pike) at I-290/I-395/US 20/MA 12 in Auburn (https://www.google.com/maps/@42.1878332,-71.8469349,2143m/data=!3m1!1e3). While contorted, all but one movement is possible. Not bad considering that there are 2 freeways and 2 local streets.
Quote from: thenetwork on February 28, 2016, 02:27:20 AM
Another interchange which intrigues me is the junction of I-70 and I-77 in Cambridge, OH, which was the largest interchange in the world as late as 1969 according to the ODOT State Highway Map. The "helix" in the middle of the "diamond" looks graceful from above:
https://www.google.com/maps/@39.9970842,-81.5595985,1279m/data=!3m1!1e3
This design is also used at the junction of I-80 and I-57 near Chicago. I think this design is an especially good choice when you have two freeways that cross at an angle-makes the interior "turbine" ramps a bit smoother, fostering easy 'left turns'.
https://www.google.com/maps/@41.5663251,-87.7445266,15.29z
Quote from: paulthemapguy on February 29, 2016, 10:51:50 PM
Quote from: thenetwork on February 28, 2016, 02:27:20 AM
Another interchange which intrigues me is the junction of I-70 and I-77 in Cambridge, OH, which was the largest interchange in the world as late as 1969 according to the ODOT State Highway Map. The "helix" in the middle of the "diamond" looks graceful from above:
https://www.google.com/maps/@39.9970842,-81.5595985,1279m/data=!3m1!1e3
This design is also used at the junction of I-80 and I-57 near Chicago. I think this design is an especially good choice when you have two freeways that cross at an angle-makes the interior "turbine" ramps a bit smoother, fostering easy 'left turns'.
https://www.google.com/maps/@41.5663251,-87.7445266,15.29z
In the 60s, it was a common design. I-96 and US 23 has this, but I-96 is being reconfigured to remove the left exits. That one was unique because there was a subdivision
inside the interchange.
Quote from: paulthemapguy on February 29, 2016, 10:51:50 PM
Quote from: thenetwork on February 28, 2016, 02:27:20 AM
Another interchange which intrigues me is the junction of I-70 and I-77 in Cambridge, OH, which was the largest interchange in the world as late as 1969 according to the ODOT State Highway Map. The "helix" in the middle of the "diamond" looks graceful from above:
https://www.google.com/maps/@39.9970842,-81.5595985,1279m/data=!3m1!1e3
This design is also used at the junction of I-80 and I-57 near Chicago. I think this design is an especially good choice when you have two freeways that cross at an angle-makes the interior "turbine" ramps a bit smoother, fostering easy 'left turns'.
https://www.google.com/maps/@41.5663251,-87.7445266,15.29z
Reminds me of this interchange near Seattle. 5 at the 405/518 junction. Couple left exits, a cloverleaf, a flyover, HOV ramps... it's all here:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2F74HP1MQ.png&hash=909ab5b20bcbfa8aab0607a1225facd8fbd84b43)
A combination of Median U-Turns & Superstreets along a corridor are original. You only see this in Michigan.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi478.photobucket.com%2Falbums%2Frr144%2Ftradephoric%2FTransportation%2520Pictures%2FMichigan%2520Lefts%2FBigBeaverCrooksMichiganLeft.jpg&hash=231002276ee099285c7f236432b357823eddce7e)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi478.photobucket.com%2Falbums%2Frr144%2Ftradephoric%2FTransportation%2520Pictures%2FRandom%2FDallascomparison.jpg&hash=782c26ed28918b91f47019b216f5ad892ab9aa47)
Quote from: authenticroadgeek on February 28, 2016, 01:53:20 PM
Quote from: empirestate on February 27, 2016, 07:30:07 PM
Just to clarify, you mean the most creative or inventive designs for intersections (and interchanges)? (As opposed to the oldest ones still in service.)
Yes, the most creative designs.
Well, the Can of Worms (I-490/I-590/NY 590) won some civil engineering award when it was rebuilt in the late 80s, which I think was at least partly for the achievement of jamming it into an existing, restricted space.
But in general, I think you have to go overseas to see real adventurous thinking in terms of interchange design. We're actually pretty conservative about it here in the U.S.
(This is kinda related to the response above)
If you want to see some crazy-complex interchange designs with over a dozen ramps each, look at the insane stuff Ontario's had to do with the 401, the busiest freeway in North America! Throughout the Toronto area, 401 is split into express and local lanes, and when the 401 reaches another very important highway, access to and from that crossing highway is provided for BOTH the express and local lanes. That leads to twice the number of ramps you'd expect at a typical freeway interchange. And all of this grandiose construction is necessary--the highway still has a good share of traffic jams despite being 14-16 lanes wide at certain points. Unique sets of challenges breed unique designs-
https://www.google.com/maps/@43.7684244,-79.3418828,15z
Quote from: paulthemapguy on March 01, 2016, 09:43:19 AM
(This is kinda related to the response above)
If you want to see some crazy-complex interchange designs with over a dozen ramps each, look at the insane stuff Ontario's had to do with the 401, the busiest freeway in North America! Throughout the Toronto area, 401 is split into express and local lanes, and when the 401 reaches another very important highway, access to and from that crossing highway is provided for BOTH the express and local lanes. That leads to twice the number of ramps you'd expect at a typical freeway interchange. And all of this grandiose construction is necessary--the highway still has a good share of traffic jams despite being 14-16 lanes wide at certain points. Unique sets of challenges breed unique designs-
https://www.google.com/maps/@43.7684244,-79.3418828,15z
I was waiting for someone to post the 401/404/DVP interchange. It's as crazy in person as it looks from the air. And it's all done so you can get almost everywhere without weaving. There are still 2 movements that can't be done directly (404 SB to EB express and DVP NB to WB express).
The I-85/I-77 interchange (https://www.google.com/maps/@35.2723406,-80.8443454,1836m/data=!3m1!1e3) in Charlotte also comes to mind. What makes it intriguing is the double-crossover that I-77 does there, allowing the two loop ramps (to I-85) and the two left-turn ramps (from I-85) to be placed in the middle.
And speaking of I-77 in Charlotte, the two junctions with I-277 (at the Brookshire (https://www.google.com/maps/@35.2431445,-80.8482998,1095m/data=!3m1!1e3) and Belk Freeways (https://www.google.com/maps/@35.2235712,-80.8660624,776m/data=!3m1!1e3)) also make an interesting case of their own.
Quote from: Henry on March 01, 2016, 10:37:29 AM
The I-85/I-77 interchange (https://www.google.com/maps/@35.2723406,-80.8443454,1836m/data=!3m1!1e3) in Charlotte also comes to mind. What makes it intriguing is the double-crossover that I-77 does there, allowing the two loop ramps (to I-85) and the two left-turn ramps (from I-85) to be placed in the middle.
And speaking of I-77 in Charlotte, the two junctions with I-277 (at the Brookshire (https://www.google.com/maps/@35.2431445,-80.8482998,1095m/data=!3m1!1e3) and Belk Freeways (https://www.google.com/maps/@35.2235712,-80.8660624,776m/data=!3m1!1e3)) also make an interesting case of their own.
^The Diverging Freeway Interchange.
The interchange at I-565 and US 231/US 431 in Huntsville, AL is rather interesting:
https://www.google.com/maps/@34.7349703,-86.5942172,16z/data=!3m1!1e3
This situation in Poughkeepsie is pretty distinctive.
https://www.google.com/maps/@41.702399,-73.9369497,16.5z
Quote from: tradephoric on March 01, 2016, 11:04:43 AM
Quote from: Henry on March 01, 2016, 10:37:29 AM
The I-85/I-77 interchange (https://www.google.com/maps/@35.2723406,-80.8443454,1836m/data=!3m1!1e3) in Charlotte also comes to mind. What makes it intriguing is the double-crossover that I-77 does there, allowing the two loop ramps (to I-85) and the two left-turn ramps (from I-85) to be placed in the middle.
And speaking of I-77 in Charlotte, the two junctions with I-277 (at the Brookshire (https://www.google.com/maps/@35.2431445,-80.8482998,1095m/data=!3m1!1e3) and Belk Freeways (https://www.google.com/maps/@35.2235712,-80.8660624,776m/data=!3m1!1e3)) also make an interesting case of their own.
^The Diverging Freeway Interchange.
Yeah, but that's only a half. 20/59/65 in Birmingham is a full. A similar config existed at 95/695 outside Baltimore before 95 was rebuild to include the express toll lanes.
Quote from: paulthemapguy on March 01, 2016, 08:04:36 PM
This situation in Poughkeepsie is pretty distinctive.
https://www.google.com/maps/@41.702399,-73.9369497,16.5z
What's worse is that it was supposed to be I-487 before most of the rest of it got cancelled
Quote from: theline on February 29, 2016, 05:16:49 PM
Indiana Toll Road/I-65/US 12/US 20/Assorted local roads: https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3 (https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3)
This is the only place I've ever seen where a ramp is a 540 degree turn. It goes from I-65 north, then east under the Toll Road, then south along it, back west over the Toll Road, into the loop ramp of a trumpet, and finally onto the Toll Road eastbound.
Quote from: Super Mateo on March 01, 2016, 11:23:42 PM
Quote from: theline on February 29, 2016, 05:16:49 PM
Indiana Toll Road/I-65/US 12/US 20/Assorted local roads: https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3 (https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3)
This is the only place I've ever seen where a ramp is a 540 degree turn. It goes from I-65 north, then east under the Toll Road, then south along it, back west over the Toll Road, into the loop ramp of a trumpet, and finally onto the Toll Road eastbound.
Mass Pike Exit 10A (https://www.google.com/maps/@42.2087716,-71.7846537,1170m/data=!3m1!1e3). I didn't post it because it's basically a simple trumpet, but it loops around to the other side. Traffic from US 20 to I-90 WB has a 540 degree turn and WB to US 20 does 450. Fits in a constrained space, but quite the oddity (and it still doesn't provide a freeway-freeway connection)
Also from MA, the quadruple trumpet (https://www.google.com/maps/@42.1571383,-72.6367876,2322m/data=!3m1!1e3) in West Springfield. 2 major expressways, neither of which terminate at the interchange, plus US 5. Straight out of the "only in Massachusetts" category. They finally striped it for 2 lanes during the last repaving project, so it isn't as much of a charlie foxtrot as it once was, but it is still bad. Good luck finding another quadruple trumpet.
Quote from: Super Mateo on March 01, 2016, 11:23:42 PM
Quote from: theline on February 29, 2016, 05:16:49 PM
Indiana Toll Road/I-65/US 12/US 20/Assorted local roads: https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3 (https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3)
This is the only place I've ever seen where a ramp is a 540 degree turn. It goes from I-65 north, then east under the Toll Road, then south along it, back west over the Toll Road, into the loop ramp of a trumpet, and finally onto the Toll Road eastbound.
Wouldn't the Helix on NJ 495 to get into the Lincoln Tunnel qualify? I'm pretty sure you go like 720 degrees...
Quote from: Zeffy on March 02, 2016, 09:36:57 AM
Quote from: Super Mateo on March 01, 2016, 11:23:42 PM
Quote from: theline on February 29, 2016, 05:16:49 PM
Indiana Toll Road/I-65/US 12/US 20/Assorted local roads: https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3 (https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3)
This is the only place I've ever seen where a ramp is a 540 degree turn. It goes from I-65 north, then east under the Toll Road, then south along it, back west over the Toll Road, into the loop ramp of a trumpet, and finally onto the Toll Road eastbound.
Wouldn't the Helix on NJ 495 to get into the Lincoln Tunnel qualify? I'm pretty sure you go like 720 degrees...
Nope - just 360. 720 would be if you went around the helix twice.
Quote from: froggie on March 01, 2016, 08:17:45 PM
Quote from: tradephoric on March 01, 2016, 11:04:43 AM
Quote from: Henry on March 01, 2016, 10:37:29 AM
The I-85/I-77 interchange (https://www.google.com/maps/@35.2723406,-80.8443454,1836m/data=!3m1!1e3) in Charlotte also comes to mind. What makes it intriguing is the double-crossover that I-77 does there, allowing the two loop ramps (to I-85) and the two left-turn ramps (from I-85) to be placed in the middle.
And speaking of I-77 in Charlotte, the two junctions with I-277 (at the Brookshire (https://www.google.com/maps/@35.2431445,-80.8482998,1095m/data=!3m1!1e3) and Belk Freeways (https://www.google.com/maps/@35.2235712,-80.8660624,776m/data=!3m1!1e3)) also make an interesting case of their own.
^The Diverging Freeway Interchange.
Yeah, but that's only a half. 20/59/65 in Birmingham is a full. A similar config existed at 95/695 outside Baltimore before 95 was rebuild to include the express toll lanes.
Just found the Birmingham example:
https://www.google.com/maps/@33.5193875,-86.8264166,1576m/data=!3m1!1e3
Quote from: cl94 on March 01, 2016, 08:56:54 PM
Quote from: paulthemapguy on March 01, 2016, 08:04:36 PM
This situation in Poughkeepsie is pretty distinctive.
https://www.google.com/maps/@41.702399,-73.9369497,16.5z
What's worse is that it was supposed to be I-487 before most of the rest of it got cancelled
Heh. I actually like the figure-eight interchange.
Quote from: cl94 on March 02, 2016, 12:04:15 AM
Also from MA, the quadruple trumpet (https://www.google.com/maps/@42.1571383,-72.6367876,2322m/data=!3m1!1e3) in West Springfield. 2 major expressways, neither of which terminate at the interchange, plus US 5. Straight out of the "only in Massachusetts" category. They finally striped it for 2 lanes during the last repaving project, so it isn't as much of a charlie foxtrot as it once was, but it is still bad. Good luck finding another quadruple trumpet.
Years ago I pointed out that interchange as special or confusing on m.t.r. and a couple of people actually responded that it's "just" a trumpet interchange. *sigh*
Quote from: Rothman on March 02, 2016, 10:27:14 AM
Quote from: cl94 on March 02, 2016, 12:04:15 AM
Also from MA, the quadruple trumpet (https://www.google.com/maps/@42.1571383,-72.6367876,2322m/data=!3m1!1e3) in West Springfield. 2 major expressways, neither of which terminate at the interchange, plus US 5. Straight out of the "only in Massachusetts" category. They finally striped it for 2 lanes during the last repaving project, so it isn't as much of a charlie foxtrot as it once was, but it is still bad. Good luck finding another quadruple trumpet.
Years ago I pointed out that interchange as special or confusing on m.t.r. and a couple of people actually responded that it's "just" a trumpet interchange. *sigh*
Wow, that's a lot of trumpets! :wow:
Quote from: cl94 on March 02, 2016, 12:04:15 AM
Quote from: Super Mateo on March 01, 2016, 11:23:42 PM
Quote from: theline on February 29, 2016, 05:16:49 PM
Indiana Toll Road/I-65/US 12/US 20/Assorted local roads: https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3 (https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3)
This is the only place I've ever seen where a ramp is a 540 degree turn. It goes from I-65 north, then east under the Toll Road, then south along it, back west over the Toll Road, into the loop ramp of a trumpet, and finally onto the Toll Road eastbound.
Mass Pike Exit 10A (https://www.google.com/maps/@42.2087716,-71.7846537,1170m/data=!3m1!1e3). I didn't post it because it's basically a simple trumpet, but it loops around to the other side. Traffic from US 20 to I-90 WB has a 540 degree turn and WB to US 20 does 450. Fits in a constrained space, but quite the oddity (and it still doesn't provide a freeway-freeway connection)
Wasn't the "connection" to MA 146 even worse years ago (or even nonexistent?)? I remember people doing all sorts of strange shunpiking or routing to get over to MA 146 that doesn't need to be done now.
Quote from: Rothman on March 02, 2016, 10:33:24 AM
Quote from: cl94 on March 02, 2016, 12:04:15 AM
Quote from: Super Mateo on March 01, 2016, 11:23:42 PM
Quote from: theline on February 29, 2016, 05:16:49 PM
Indiana Toll Road/I-65/US 12/US 20/Assorted local roads: https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3 (https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3)
This is the only place I've ever seen where a ramp is a 540 degree turn. It goes from I-65 north, then east under the Toll Road, then south along it, back west over the Toll Road, into the loop ramp of a trumpet, and finally onto the Toll Road eastbound.
Mass Pike Exit 10A (https://www.google.com/maps/@42.2087716,-71.7846537,1170m/data=!3m1!1e3). I didn't post it because it's basically a simple trumpet, but it loops around to the other side. Traffic from US 20 to I-90 WB has a 540 degree turn and WB to US 20 does 450. Fits in a constrained space, but quite the oddity (and it still doesn't provide a freeway-freeway connection)
Wasn't the "connection" to MA 146 even worse years ago (or even nonexistent?)? I remember people doing all sorts of strange shunpiking or routing to get over to MA 146 that doesn't need to be done now.
Yeah, I think people used to use Exit 10. I-395 still has a bunch of signs instructing people to use US 20 to get to MA 146 (at Exit 10A).
Quote from: Henry on March 02, 2016, 10:29:04 AM
Quote from: Rothman on March 02, 2016, 10:27:14 AM
Quote from: cl94 on March 02, 2016, 12:04:15 AM
Also from MA, the quadruple trumpet (https://www.google.com/maps/@42.1571383,-72.6367876,2322m/data=!3m1!1e3) in West Springfield. 2 major expressways, neither of which terminate at the interchange, plus US 5. Straight out of the "only in Massachusetts" category. They finally striped it for 2 lanes during the last repaving project, so it isn't as much of a charlie foxtrot as it once was, but it is still bad. Good luck finding another quadruple trumpet.
Years ago I pointed out that interchange as special or confusing on m.t.r. and a couple of people actually responded that it's "just" a trumpet interchange. *sigh*
Wow, that's a lot of trumpets! :wow:
https://www.youtube.com/watch?v=OYwoy7QhNBY
Quote from: cl94 on March 02, 2016, 10:42:47 AMI-395 still has a bunch of signs instructing people to use US 20 to get to MA 146 (at Exit 10A).
And by the end of the year that will be a free trip on the MassPike.
Quote from: Henry on March 01, 2016, 10:37:29 AM
The I-85/I-77 interchange (https://www.google.com/maps/@35.2723406,-80.8443454,1836m/data=!3m1!1e3) in Charlotte also comes to mind. What makes it intriguing is the double-crossover that I-77 does there, allowing the two loop ramps (to I-85) and the two left-turn ramps (from I-85) to be placed in the middle.
And speaking of I-77 in Charlotte, the two junctions with I-277 (at the Brookshire (https://www.google.com/maps/@35.2431445,-80.8482998,1095m/data=!3m1!1e3) and Belk Freeways (https://www.google.com/maps/@35.2235712,-80.8660624,776m/data=!3m1!1e3)) also make an interesting case of their own.
The Cyclone (I-85/I-485) earns an honorable mention
The I-90/I-790 trumpet in Utica was one continuous:
https://www.google.com/maps/@43.1144609,-75.211859,16z
Quote from: Buffaboy on March 02, 2016, 01:58:51 PM
The I-90/I-790 trumpet in Utica was one continuous:
https://www.google.com/maps/@43.1144609,-75.211859,16z
It's a trombone.
The US 11 and PA 581 interchange with the EB PA 581 to US 11 SB and Carlisle Pike ramp. It goes to the east side of PA 581 after it exits and then goes back to the west side.
If you go to the EB Pike you cross PA 581 three times.
Then of course, Breezewood, is an original further west on the PA Turnpike. Of course we know that one :bigass:
Quote from: Henry on March 02, 2016, 10:22:17 AM
Quote from: froggie on March 01, 2016, 08:17:45 PM
Quote from: tradephoric on March 01, 2016, 11:04:43 AM
Quote from: Henry on March 01, 2016, 10:37:29 AM
The I-85/I-77 interchange (https://www.google.com/maps/@35.2723406,-80.8443454,1836m/data=!3m1!1e3) in Charlotte also comes to mind. What makes it intriguing is the double-crossover that I-77 does there, allowing the two loop ramps (to I-85) and the two left-turn ramps (from I-85) to be placed in the middle.
And speaking of I-77 in Charlotte, the two junctions with I-277 (at the Brookshire (https://www.google.com/maps/@35.2431445,-80.8482998,1095m/data=!3m1!1e3) and Belk Freeways (https://www.google.com/maps/@35.2235712,-80.8660624,776m/data=!3m1!1e3)) also make an interesting case of their own.
^The Diverging Freeway Interchange.
Yeah, but that's only a half. 20/59/65 in Birmingham is a full. A similar config existed at 95/695 outside Baltimore before 95 was rebuild to include the express toll lanes.
Just found the Birmingham example:
https://www.google.com/maps/@33.5193875,-86.8264166,1576m/data=!3m1!1e3
Also known to us Alabamians as "Malfunction Junction". Also, in the I-20/I-59 bridge replacement project, more ramps to connect to surface streets will be added to that interchange.
Quote from: cl94 on March 02, 2016, 12:04:15 AM
Also from MA, the quadruple trumpet (https://www.google.com/maps/@42.1571383,-72.6367876,2322m/data=!3m1!1e3) in West Springfield. 2 major expressways, neither of which terminate at the interchange, plus US 5. Straight out of the "only in Massachusetts" category. They finally striped it for 2 lanes during the last repaving project, so it isn't as much of a charlie foxtrot as it once was, but it is still bad. Good luck finding another quadruple trumpet.
I'd nominate Exit 13 on I-91 (US 5) as more unique than the I-91/MassPike/US 5 connection.
Quote from: hbelkins on March 02, 2016, 02:55:08 PM
Quote from: cl94 on March 02, 2016, 12:04:15 AM
Also from MA, the quadruple trumpet (https://www.google.com/maps/@42.1571383,-72.6367876,2322m/data=!3m1!1e3) in West Springfield. 2 major expressways, neither of which terminate at the interchange, plus US 5. Straight out of the "only in Massachusetts" category. They finally striped it for 2 lanes during the last repaving project, so it isn't as much of a charlie foxtrot as it once was, but it is still bad. Good luck finding another quadruple trumpet.
I'd nominate Exit 13 on I-91 (US 5) as more unique than the I-91/MassPike/US 5 connection.
I forgot about that one. Another thing that looks Massachusetts.
I've always found the interchange between I-476 and PA 3 (https://goo.gl/maps/pm9f9U1Pka62) in Broomall, PA to be a tad bit peculiar (though it doesn't nearly compare to the other ones posted in the thread). It's a perfect diamond interchange with one cloverleaf ramp for PA 3 west to I-476 south. Traffic can't turn left at the traffic signal (https://goo.gl/maps/YtahTfy4VW42) beyond the cloverleaf ramp (nor can they turn right from the opposite direction), yet there's marked and usable pavement (https://goo.gl/maps/vnwg2maF9az) for motorists to use if they choose to make the illegal left or right. This small ramp connecting PA 3 to the ramp from 3 east to 476 south is only legally allowed to be used by traffic coming off of I-476 south on the offramp, which even has it's own designated lane (https://goo.gl/maps/TVLui1t42an) as you approach the intersection. Forgive me if there are a bunch of other examples of this same situation, but I thought it was interesting.
Exit 38 on I-95 in Connecticut to the Merritt Parkway (Exit 54 on Merritt) needs a connector that has exit numbers of its own
Quote from: Ian on March 02, 2016, 03:41:50 PM
I've always found the interchange between I-476 and PA 3 (https://goo.gl/maps/pm9f9U1Pka62) in Broomall, PA to be a tad bit peculiar (though it doesn't nearly compare to the other ones posted in the thread). It's a perfect diamond interchange with one cloverleaf ramp for PA 3 west to I-476 south. Traffic can't turn left at the traffic signal (https://goo.gl/maps/YtahTfy4VW42) beyond the cloverleaf ramp (nor can they turn right from the opposite direction), yet there's marked and usable pavement (https://goo.gl/maps/vnwg2maF9az) for motorists to use if they choose to make the illegal left or right. This small ramp connecting PA 3 to the ramp from 3 east to 476 south is only legally allowed to be used by traffic coming off of I-476 south on the offramp, which even has it's own designated lane (https://goo.gl/maps/TVLui1t42an) as you approach the intersection. Forgive me if there are a bunch of other examples of this same situation, but I thought it was interesting.
This setup is used, almost always, for two reasons:
1) Transit stops on the ramps, thus permitting re-entry for buses
2) re-entry for overheight vehicles unable to use the freeway underpass
EDIT: Your example is definitely for reason 2.
There's one A4 in Olympia, WA that continues to baffle me. Unlike the two primary uses for the re-entry ramp listed above, this ramp has neither of those obstacles (the freeway uses an overpass, and there's no transit stops). The ramp exists only for traffic that took the wrong exit:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2F8Io3KYo.png&hash=c4b639ddc90e23b33f1a6ab229258d5ef9af0eff)
Quote from: Super Mateo on March 01, 2016, 11:23:42 PM
Quote from: theline on February 29, 2016, 05:16:49 PM
Indiana Toll Road/I-65/US 12/US 20/Assorted local roads: https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3 (https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3)
This is the only place I've ever seen where a ramp is a 540 degree turn. It goes from I-65 north, then east under the Toll Road, then south along it, back west over the Toll Road, into the loop ramp of a trumpet, and finally onto the Toll Road eastbound.
Is it weird that that way avoids the toll booths? I can't help but think that the people getting on the Toll Road aren't getting their entrance ticket.
Quote from: CtrlAltDel on March 02, 2016, 06:53:05 PM
Quote from: Super Mateo on March 01, 2016, 11:23:42 PM
Quote from: theline on February 29, 2016, 05:16:49 PM
Indiana Toll Road/I-65/US 12/US 20/Assorted local roads: https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3 (https://www.google.com/maps/@41.5916701,-87.305009,2705m/data=!3m1!1e3)
This is the only place I've ever seen where a ramp is a 540 degree turn. It goes from I-65 north, then east under the Toll Road, then south along it, back west over the Toll Road, into the loop ramp of a trumpet, and finally onto the Toll Road eastbound.
Is it weird that that way avoids the toll booths? I can't help but think that the people getting on the Toll Road aren't getting their entrance ticket.
That part of the ITR is not ticketed. The barrier for tickets is just east of the Borman exit, about MM 22 I think. From that barrier to the Illinois line, there are just occasional stops for tolls. In fact, motorists can travel between I-65 and I-94 without paying a toll.
In the Fairland area of Montgomery County, Maryland is the interchange of U.S. 29 (Columbia Pike) and Md. 200 (ICC toll road) (https://www.google.com/maps/place/Silver+Spring,+MD+20904/@39.0775626,-76.9518342,17z/data=!3m1!1e3!4m2!3m1!1s0x89b7c53c2de460c3:0x7a7216413ba1b0ba).
It features:
- Two soaring flyovers crossing the middle of the interchange to carry Md. 200 eastbound to U.S. 29 northbound and Md. 200 westbound to U.S. 29 southbound;
- A cloverleaf ramp to carry southbound U.S. 29 traffic onto Md. 200 eastbound which passes over the ramp that carries traffic from eastbound Md. 200 to southbound U.S. 29 - twice - and passes under both of the flyover ramps;
- A cloverleaf ramp to carry eastbound Md. 200 traffic to Briggs Chaney Road (it has a separate exit number);
- A jughandle ramp to carry southbound U.S. 29 traffic to Fairland Road; and
- A multi-purpose trail that runs north and south parallel to U.S. 29 under much of this interchange.
It was built this way in part because of the extremely constrained amount of space available. Land was set aside for the interchange many decades ago, and I believe it was assumed that a cloverleaf-type of interchange would be built here.
Quote from: jakeroot on March 02, 2016, 04:29:42 PM
This setup is used, almost always, for two reasons:
1) Transit stops on the ramps, thus permitting re-entry for buses
2) re-entry for overheight vehicles unable to use the freeway underpass
EDIT: Your example is definitely for reason 2.
There's one A4 in Olympia, WA that continues to baffle me. Unlike the two primary uses for the re-entry ramp listed above, this ramp has neither of those obstacles (the freeway uses an overpass, and there's no transit stops). The ramp exists only for traffic that took the wrong exit:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2F8Io3KYo.png&hash=c4b639ddc90e23b33f1a6ab229258d5ef9af0eff)
I think it's actually quite common seeing straight lanes on exit ramps for parclos and diamond interchanges. But if an over-height vehicle can be restricted from an underpass, we can also consider that an overweight vehicle can be too heavy for an overpass with a weight restriction. Weight restrictions are usually only posted if they're below the typical maxima dictated in the state law. For vehicles with exceeding weights, you have to analyze it bridge-by-bridge sometimes.
Quote from: Henry on March 02, 2016, 10:29:04 AM
Quote from: Rothman on March 02, 2016, 10:27:14 AM
Quote from: cl94 on March 02, 2016, 12:04:15 AM
Also from MA, the quadruple trumpet (https://www.google.com/maps/@42.1571383,-72.6367876,2322m/data=!3m1!1e3) in West Springfield. 2 major expressways, neither of which terminate at the interchange, plus US 5. Straight out of the "only in Massachusetts" category. They finally striped it for 2 lanes during the last repaving project, so it isn't as much of a charlie foxtrot as it once was, but it is still bad. Good luck finding another quadruple trumpet.
Years ago I pointed out that interchange as special or confusing on m.t.r. and a couple of people actually responded that it's "just" a trumpet interchange. *sigh*
Wow, that's a lot of trumpets! :wow:
Guess we'll have to start calling that the John Williams Interchange. :cool:
Quote from: empirestate on March 02, 2016, 09:27:04 PM
Quote from: Henry on March 02, 2016, 10:29:04 AM
Quote from: Rothman on March 02, 2016, 10:27:14 AM
Quote from: cl94 on March 02, 2016, 12:04:15 AM
Also from MA, the quadruple trumpet (https://www.google.com/maps/@42.1571383,-72.6367876,2322m/data=!3m1!1e3) in West Springfield. 2 major expressways, neither of which terminate at the interchange, plus US 5. Straight out of the "only in Massachusetts" category. They finally striped it for 2 lanes during the last repaving project, so it isn't as much of a charlie foxtrot as it once was, but it is still bad. Good luck finding another quadruple trumpet.
Years ago I pointed out that interchange as special or confusing on m.t.r. and a couple of people actually responded that it's "just" a trumpet interchange. *sigh*
Wow, that's a lot of trumpets! :wow:
Guess we'll have to start calling that the John Williams Interchange. :cool:
I GET IT. 10/10
Quote from: hbelkins on March 02, 2016, 02:55:08 PM
Quote from: cl94 on March 02, 2016, 12:04:15 AM
Also from MA, the quadruple trumpet (https://www.google.com/maps/@42.1571383,-72.6367876,2322m/data=!3m1!1e3) in West Springfield. 2 major expressways, neither of which terminate at the interchange, plus US 5. Straight out of the "only in Massachusetts" category. They finally striped it for 2 lanes during the last repaving project, so it isn't as much of a charlie foxtrot as it once was, but it is still bad. Good luck finding another quadruple trumpet.
I'd nominate Exit 13 on I-91 (US 5) as more unique than the I-91/MassPike/US 5 connection.
Looks like the figure eight in Poughkeepsie, NY.
This interchange at the junction of I-95 and I-280 in New Jersey.
https://www.google.com/maps/@40.7532612,-74.1173765,1081m/data=!3m1!1e3 (https://www.google.com/maps/@40.7532612,-74.1173765,1081m/data=!3m1!1e3)
Quote from: CobaltYoshi27 on March 02, 2016, 09:43:59 PM
Quote from: empirestate on March 02, 2016, 09:27:04 PM
Quote from: Henry on March 02, 2016, 10:29:04 AM
Quote from: Rothman on March 02, 2016, 10:27:14 AM
Quote from: cl94 on March 02, 2016, 12:04:15 AM
Also from MA, the quadruple trumpet (https://www.google.com/maps/@42.1571383,-72.6367876,2322m/data=!3m1!1e3) in West Springfield. 2 major expressways, neither of which terminate at the interchange, plus US 5. Straight out of the "only in Massachusetts" category. They finally striped it for 2 lanes during the last repaving project, so it isn't as much of a charlie foxtrot as it once was, but it is still bad. Good luck finding another quadruple trumpet.
Years ago I pointed out that interchange as special or confusing on m.t.r. and a couple of people actually responded that it's "just" a trumpet interchange. *sigh*
Wow, that's a lot of trumpets! :wow:
Guess we'll have to start calling that the John Williams Interchange. :cool:
I GET IT. 10/10
We have a winner! :sombrero:
Quote from: jakeroot on March 02, 2016, 04:29:42 PM
Quote from: Ian on March 02, 2016, 03:41:50 PM
I've always found the interchange between I-476 and PA 3 (https://goo.gl/maps/pm9f9U1Pka62) in Broomall, PA to be a tad bit peculiar (though it doesn't nearly compare to the other ones posted in the thread). It's a perfect diamond interchange with one cloverleaf ramp for PA 3 west to I-476 south. Traffic can't turn left at the traffic signal (https://goo.gl/maps/YtahTfy4VW42) beyond the cloverleaf ramp (nor can they turn right from the opposite direction), yet there's marked and usable pavement (https://goo.gl/maps/vnwg2maF9az) for motorists to use if they choose to make the illegal left or right. This small ramp connecting PA 3 to the ramp from 3 east to 476 south is only legally allowed to be used by traffic coming off of I-476 south on the offramp, which even has it's own designated lane (https://goo.gl/maps/TVLui1t42an) as you approach the intersection. Forgive me if there are a bunch of other examples of this same situation, but I thought it was interesting.
This setup is used, almost always, for two reasons:
1) Transit stops on the ramps, thus permitting re-entry for buses
2) re-entry for overheight vehicles unable to use the freeway underpass
EDIT: Your example is definitely for reason 2.
No it's not. I-476 has no clearance issues whatsoever.
The way US 70 intersects I-95 since they built the freeway for it between Goldsboro and I-40 just outside the Metro Raliegh area.
https://www.google.com/maps/@35.5086162,-78.2815112,3a,75y,17.54h,86.21t/data=!3m6!1e1!3m4!1sxG4-vkK4s1AmuUj0y1UKzQ!2e0!7i13312!8i6656!6m1!1e1
Here you see how its signed. Mainline US 70 exits itself here to use the city streets of Selma to interchange with I-95 and junction with US 301. Meanwhile the freeway is Bypass US 70 until its parent reenters the freeway a few miles later.
I do not think there is something ever like this anyplace although US 63 and I-70 have the same type of set up. However, US 63 does not leave the freeway to do a Breezewood like US 70 does here. US 63 is on the freeway and the surface connection roadway is just not signed as any part of US 63.
Quote from: jeffandnicole on March 03, 2016, 10:52:16 AM
Quote from: jakeroot on March 02, 2016, 04:29:42 PM
Quote from: Ian on March 02, 2016, 03:41:50 PM
I've always found the interchange between I-476 and PA 3 (https://goo.gl/maps/pm9f9U1Pka62) in Broomall, PA to be a tad bit peculiar (though it doesn't nearly compare to the other ones posted in the thread). It's a perfect diamond interchange with one cloverleaf ramp for PA 3 west to I-476 south. Traffic can't turn left at the traffic signal (https://goo.gl/maps/YtahTfy4VW42) beyond the cloverleaf ramp (nor can they turn right from the opposite direction), yet there's marked and usable pavement (https://goo.gl/maps/vnwg2maF9az) for motorists to use if they choose to make the illegal left or right. This small ramp connecting PA 3 to the ramp from 3 east to 476 south is only legally allowed to be used by traffic coming off of I-476 south on the offramp, which even has it's own designated lane (https://goo.gl/maps/TVLui1t42an) as you approach the intersection. Forgive me if there are a bunch of other examples of this same situation, but I thought it was interesting.
This setup is used, almost always, for two reasons:
1) Transit stops on the ramps, thus permitting re-entry for buses
2) re-entry for overheight vehicles unable to use the freeway underpass
EDIT: Your example is definitely for reason 2.
No it's not. I-476 has no clearance issues whatsoever.
Emphasis on "overheight," i.e. vehicles that exceed regulations for height. You never know what kind of crazy monstrosities a trucking company might need to haul, like a big bulldozer, a steel beam, or a big piece of precast concrete. These situations are anomalies but they do happen; when they do, clearance issues are inevitable no matter what standard the bridges/underpasses adhere to. Similarly, an overWEIGHT truck will need to avoid certain bridges OVER things, even though the bridge is built to a respected standard, just because the weight of the object being hauled is just colossal. I'm sure all this stuff is intuitive enough, and it's nothing new; what I want to emphasize here is that you can have all sorts of crazy colossal vehicle dimensions and weights that are difficult to accommodate regardless of bridge/highway standards.
Quote from: roadman65 on March 04, 2016, 08:42:00 AM
The way US 70 intersects I-95 since they built the freeway for it between Goldsboro and I-40 just outside the Metro Raliegh area.
https://www.google.com/maps/@35.5086162,-78.2815112,3a,75y,17.54h,86.21t/data=!3m6!1e1!3m4!1sxG4-vkK4s1AmuUj0y1UKzQ!2e0!7i13312!8i6656!6m1!1e1
Here you see how its signed. Mainline US 70 exits itself here to use the city streets of Selma to interchange with I-95 and junction with US 301. Meanwhile the freeway is Bypass US 70 until its parent reenters the freeway a few miles later.
I do not think there is something ever like this anyplace although US 63 and I-70 have the same type of set up. However, US 63 does not leave the freeway to do a Breezewood like US 70 does here. US 63 is on the freeway and the surface connection roadway is just not signed as any part of US 63.
Slight derail, but in the area there are US 70, US 70A, US 70 Business, and US 70 Bypass, all signed. First time I've seen that many in one place. (Nashville metro has 31, 31A, 31E, and 31W, but not that close together.)
Quote from: paulthemapguy on March 04, 2016, 09:40:22 AM
Quote from: jeffandnicole on March 03, 2016, 10:52:16 AM
Quote from: jakeroot on March 02, 2016, 04:29:42 PM
Quote from: Ian on March 02, 2016, 03:41:50 PM
I've always found the interchange between I-476 and PA 3 (https://goo.gl/maps/pm9f9U1Pka62) in Broomall, PA to be a tad bit peculiar (though it doesn't nearly compare to the other ones posted in the thread). It's a perfect diamond interchange with one cloverleaf ramp for PA 3 west to I-476 south. Traffic can't turn left at the traffic signal (https://goo.gl/maps/YtahTfy4VW42) beyond the cloverleaf ramp (nor can they turn right from the opposite direction), yet there's marked and usable pavement (https://goo.gl/maps/vnwg2maF9az) for motorists to use if they choose to make the illegal left or right. This small ramp connecting PA 3 to the ramp from 3 east to 476 south is only legally allowed to be used by traffic coming off of I-476 south on the offramp, which even has it's own designated lane (https://goo.gl/maps/TVLui1t42an) as you approach the intersection. Forgive me if there are a bunch of other examples of this same situation, but I thought it was interesting.
This setup is used, almost always, for two reasons:
1) Transit stops on the ramps, thus permitting re-entry for buses
2) re-entry for overheight vehicles unable to use the freeway underpass
EDIT: Your example is definitely for reason 2.
No it's not. I-476 has no clearance issues whatsoever.
Emphasis on "overheight," i.e. vehicles that exceed regulations for height. You never know what kind of crazy monstrosities a trucking company might need to haul, like a big bulldozer, a steel beam, or a big piece of precast concrete. These situations are anomalies but they do happen; when they do, clearance issues are inevitable no matter what standard the bridges/underpasses adhere to. Similarly, an overWEIGHT truck will need to avoid certain bridges OVER things, even though the bridge is built to a respected standard, just because the weight of the object being hauled is just colossal. I'm sure all this stuff is intuitive enough, and it's nothing new; what I want to emphasize here is that you can have all sorts of crazy colossal vehicle dimensions and weights that are difficult to accommodate regardless of bridge/highway standards.
Yeah, but in the Philly area in general, the infrastructure is so old and there are so many low-height and overweight situations on the local roadways and older highways that simply getting to that overpass wouldn't be possible from local roads. Besides, there's no height signage, and overpasses before and after this overpass are about the same height. Usually in over height situations, there are signs prior to the bridge cautioning truckers about the low height.
In this area, it's pretty much taken for granted that you must have your payload at 13' 6" or less. 14' may be the absolute maximum. It's nearly impossible to get around otherwise.
The Blue Route was originally constructed from the I-76/PA Turnpike area down to this interchange at Rt. 3. South of here was the subject of numerous lawsuits, and when it was finally built, it was only 4 lanes wide, not 6 lanes as the area north of it. If I were to guess, these straight ramps are some kind of anomaly that remained after PennDOT fully completed the interchange.
Quote from: kurumi on March 04, 2016, 11:18:15 AM
Quote from: roadman65 on March 04, 2016, 08:42:00 AM
The way US 70 intersects I-95 since they built the freeway for it between Goldsboro and I-40 just outside the Metro Raliegh area.
https://www.google.com/maps/@35.5086162,-78.2815112,3a,75y,17.54h,86.21t/data=!3m6!1e1!3m4!1sxG4-vkK4s1AmuUj0y1UKzQ!2e0!7i13312!8i6656!6m1!1e1
Here you see how its signed. Mainline US 70 exits itself here to use the city streets of Selma to interchange with I-95 and junction with US 301. Meanwhile the freeway is Bypass US 70 until its parent reenters the freeway a few miles later.
I do not think there is something ever like this anyplace although US 63 and I-70 have the same type of set up. However, US 63 does not leave the freeway to do a Breezewood like US 70 does here. US 63 is on the freeway and the surface connection roadway is just not signed as any part of US 63.
Slight derail, but in the area there are US 70, US 70A, US 70 Business, and US 70 Bypass, all signed. First time I've seen that many in one place. (Nashville metro has 31, 31A, 31E, and 31W, but not that close together.)
You said it that only Nashville comes close. No other situation arises like this one. NCDOT did it to avoid a situation like two cities in Michigan did with US 127 (former US 27) where there are two simultaneous business routes on each side of the mainline. So, according to wiki, they opted for the bypass designation instead.
FL 84 at I-95: has this ever been copied before?
(https://farm3.staticflickr.com/2899/14187567869_0f2f13f757_o.jpg) (https://flic.kr/p/nBGZD8)
Eastbound SR 84 traffic is elevated so that turning traffic to and from I-95 isn't quite impeded, and so thru SR 84 traffic doesn't have to stop.
There's also C/D lanes which lead to and from I-595.
Quote from: formulanone on March 04, 2016, 01:34:09 PM
FL 84 at I-95: has this ever been copied before?
(https://farm3.staticflickr.com/2899/14187567869_0f2f13f757_o.jpg) (https://flic.kr/p/nBGZD8)
Eastbound SR 84 traffic is elevated so that turning traffic to and from I-95 isn't quite impeded, and so thru SR 84 traffic doesn't have to stop.
There's also C/D lanes which lead to and from I-595.
Quite original here. Maybe this should replace the DDIs that are being built and proposed. :bigass:
There's a partial version of that at DC 295 and Benning Road.
Quote from: roadman65 on March 04, 2016, 01:46:56 PM
Quote from: formulanone on March 04, 2016, 01:34:09 PM
FL 84 at I-95: has this ever been copied before?
(https://farm3.staticflickr.com/2899/14187567869_0f2f13f757_o.jpg) (https://flic.kr/p/nBGZD8)
Eastbound SR 84 traffic is elevated so that turning traffic to and from I-95 isn't quite impeded, and so thru SR 84 traffic doesn't have to stop.
There's also C/D lanes which lead to and from I-595.
Quite original here. Maybe this should replace the DDIs that are being built and proposed. :bigass:
That's a good one; I don't think I've ever seen it elsewhere. It seems like a good way to eliminate left turns, but the scale of construction and thus the expense likely make it impractical in most places.
iPhone
Quote from: CobaltYoshi27 on March 02, 2016, 03:54:28 PM
Exit 38 on I-95 in Connecticut to the Merritt Parkway (Exit 54 on Merritt) needs a connector that has exit numbers of its own
This is not one interchange though. The "connector" is the Milford Parkway. There is a regular directional interchange between the Milford (Exit 2) and I-95 (Exit 38). The interchange at the northern end of the Milford (Exits 3-4) is an unusual interchange given that there is another exit in between the exits for CT-15 north and south.
Quote from: AMLNet49 on March 08, 2016, 04:34:48 PM
Quote from: CobaltYoshi27 on March 02, 2016, 03:54:28 PM
Exit 38 on I-95 in Connecticut to the Merritt Parkway (Exit 54 on Merritt) needs a connector that has exit numbers of its own
This is not one interchange though. The "connector" is the Milford Parkway. There is a regular directional interchange between the Milford (Exit 2) and I-95 (Exit 38). The interchange at the northern end of the Milford (Exits 3-4) is an unusual interchange given that there is another exit in between the exits for CT-15 north and south.
I have always considered it one interchange considering the exits post I-95 or the Merritt depending on where you are exiting.
Quote from: cpzilliacus on March 02, 2016, 08:30:11 PM
In the Fairland area of Montgomery County, Maryland is the interchange of U.S. 29 (Columbia Pike) and Md. 200 (ICC toll road) (https://www.google.com/maps/place/Silver+Spring,+MD+20904/@39.0775626,-76.9518342,17z/data=!3m1!1e3!4m2!3m1!1s0x89b7c53c2de460c3:0x7a7216413ba1b0ba).
It features:
[...]
- A cloverleaf ramp to carry eastbound Md. 200 traffic to Briggs Chaney Road (it has a separate exit number);
- A jughandle ramp to carry southbound U.S. 29 traffic to Fairland Road; and
[...]
Indeed an interesting one, and it's clearly all the same Interchange, despite the fact that ramps have different exit numbers. Because the rest of Exit 17 is a half diamond just east (no toll gantry between the two, and it's impossible to legally use just the part in the middle), should this whole thing be considered one interchange?
For some reason I've always been fascinated by the interchange of I 95, 295, 495 south of Wilmington. I'd say DE 141 is a separate interchange, but is the rest of this just one interchange? Ditto with the Shirlington interchange at the bottom of the DC beltway-even if you ignore the connected interchange with VA644 just south. Quite the convoluted collection of ramps connecting 2 highways, and their HOV lanes.
Quote from: formulanone on March 04, 2016, 01:34:09 PM
FL 84 at I-95: has this ever been copied before?
(https://farm3.staticflickr.com/2899/14187567869_0f2f13f757_o.jpg) (https://flic.kr/p/nBGZD8)
Eastbound SR 84 traffic is elevated so that turning traffic to and from I-95 isn't quite impeded, and so thru SR 84 traffic doesn't have to stop.
There's also C/D lanes which lead to and from I-595.
I-80 and 24th street in Omaha is a pale shadow of that.
This is spectacular:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.dailymail.co.uk%2Fi%2Fpix%2F2011%2F06%2F30%2Farticle-2009748-0CCBFD6F00000578-504_964x521.jpg&hash=a106a55d5485f6f13369ba9383c64b6b52aad1b1)
Quote from: Jardine on March 09, 2016, 01:18:29 PM
I-80 and 24th street in Omaha is a pale shadow of that.
I-80 and 24th Street is a half diamond, silly goose.
Quote from: Jardine on March 09, 2016, 01:19:15 PM
This is spectacular:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.dailymail.co.uk%2Fi%2Fpix%2F2011%2F06%2F30%2Farticle-2009748-0CCBFD6F00000578-504_964x521.jpg&hash=a106a55d5485f6f13369ba9383c64b6b52aad1b1)
Where is it?
Quote from: kkt on March 09, 2016, 02:00:41 PM
Where is it?
Googleland. (http://www.google.com/search?tbs=sbi:AMhZZiu1A7Nnyhbnw0sdMEaWSouzA_1TsOiHFg0QCObQvLyOPItnIgtWSUdslGbhIs1Dl7HTFDxdo4rwOKgWNlSCTkMNz91FqEqYwmhwehjlx0WgAbrKiEyYG-zt-s45R35FY2BMjBoON3JPdri6Gq_1WHIJ-djXhDpTFlyvdhaJUylK5TMxqIJKgh01mbJg5Qbsk7JftpPU3U7aALA5mpsJ5WFJOPpfGy45qMU1Dcpmkm12EVZYlopVa4LJW3h64Rf5ftI9Jw6lqU6PwklswmKrRnM-pdZj4jj1cZLOolizyp1grEAlqnc2onL7Dql7guXkET9Gd_1GMsama-lfpLGz8Jji-MXLhqzjtbRY6aYAvYO4axPqoUP7S-v-mWcjbzTH_1uLn5ZRxEMCEREH4qGckdTo41B1BufLSAnDz6qhc_1o9Mp1B2r_1MPTL5VTEdLP0NzbVN-r4UrIbwMmzogLHAyvaGAqXzjx0eLBnKt1F2tM7gOTrLT9A0vX4dlPElebb6A3u29M6d0HabTmQa3R2VGqmn2zw9LWpb_1-HgYjbQ8xi8wMo-aVLTHEAjWi3sHIqriViHfPtU_1H9ncJkYZWP-I9t0k0UqKekbAvQ3sufKRPJ4Ibp14xGpXUASXBWRIGM7o92lxvDPfK1evgE8BgPhigmIVcnZ6EltuDniKZPsgX21LTmXNPyk20GF1QqPS2jt6SYti4DbPumbdbFkFqy-wgPsyURKTRSJ4NrAoUdeE2S5IyBsXaIKkq788U_1VBlAdIvkKTHAv5iAVD-dnJRZHVuS46L1FRiJnnU30shJoxIN3qO_1RKLihlUlbjSdQ7nQFZxlDyHu4h6evQADg9sLtMIydWGEToEr2K02RzFASEl00EVDBU5cbz-vErB-Kd8SzvRi8jitj0lw26f7t9UXu-0-2_1mlGkNIAnFdRlHp2FtPEW0P2e-5y5uLCRFGIe92hlFLpY-dOuyHLlhKbj_1j27ySPnWStm-vqznNloqnCvGemsL3JTu7iFqy8wxVs8E4DM8oMt9NfCdEQv8dJloLGLTp5AnQk2xhfrzcjQpPwqL7QqdRmeY9sL76SLsfHaQDhAAQcUSEmdDnX6kCgp3guWF29z3b3YTsILWFzQwSbKZ2YeMMdkhS7Majkft-lLcgNEA3o2ZYlAlFr8Ef8VP1JO6_1H8phwVfyVanVG0eards_1-nv9rNkGuqnIJLUg81TNERizIjiUYa0jWq2076rcp-MpqxQNS9y7d4woTlzLBLudBWVLKAf7ixELjwwTD9EHgESPWl82oayHocuKJPVjpRgtr743RP_1apfm-xNKD5Urb2hhA8bP9xyT5tLOArDSjZePams9UgPcQ4mvy1Hu0kw8a9eMpTd7wlBM7bsiG8n-i0PBZ2rhM-Ec5iYeTXOLTOAA4oENYpL50npWraIJceSL0PnDOU8OhoaNNwJP2Y1mjbiSZjWimSBWc_1NkpEVQM76Rh1dLEUa9VbD2Ga_13iCQvV9F6YQUJ_1dfnsb-qjKnQHjozpEK7OtieMBScFysW4jQPzZ346jL4XHoN13kUUKCjzV6vykr6zkVLwSqmtuVfaHA1-vIOQf3gUkBknjD4xmTd84EHlJzgRDhhnfoRDNDFKqdQ8m95OpOguYzNHXACIYFRn5IuL37mjRbs0E3x0OBvQp8anaelthBVlaTQd2m2NXRPsSDFAO9g&hl=en)
Quote from: NE2 on March 09, 2016, 01:22:20 PM
Quote from: Jardine on March 09, 2016, 01:18:29 PM
I-80 and 24th street in Omaha is a pale shadow of that.
I-80 and 24th Street is a half diamond, silly goose.
In that ramps come up to midspan of the overpass, and have a traffic signal controlled intersection there.
Quote from: NE2 on March 09, 2016, 02:08:06 PM
Quote from: kkt on March 09, 2016, 02:00:41 PM
Where is it?
Googleland. (http://www.google.com/search?tbs=sbi:AMhZZiu1A7Nnyhbnw0sdMEaWSouzA_1TsOiHFg0QCObQvLyOPItnIgtWSUdslGbhIs1Dl7HTFDxdo4rwOKgWNlSCTkMNz91FqEqYwmhwehjlx0WgAbrKiEyYG-zt-s45R35FY2BMjBoON3JPdri6Gq_1WHIJ-djXhDpTFlyvdhaJUylK5TMxqIJKgh01mbJg5Qbsk7JftpPU3U7aALA5mpsJ5WFJOPpfGy45qMU1Dcpmkm12EVZYlopVa4LJW3h64Rf5ftI9Jw6lqU6PwklswmKrRnM-pdZj4jj1cZLOolizyp1grEAlqnc2onL7Dql7guXkET9Gd_1GMsama-lfpLGz8Jji-MXLhqzjtbRY6aYAvYO4axPqoUP7S-v-mWcjbzTH_1uLn5ZRxEMCEREH4qGckdTo41B1BufLSAnDz6qhc_1o9Mp1B2r_1MPTL5VTEdLP0NzbVN-r4UrIbwMmzogLHAyvaGAqXzjx0eLBnKt1F2tM7gOTrLT9A0vX4dlPElebb6A3u29M6d0HabTmQa3R2VGqmn2zw9LWpb_1-HgYjbQ8xi8wMo-aVLTHEAjWi3sHIqriViHfPtU_1H9ncJkYZWP-I9t0k0UqKekbAvQ3sufKRPJ4Ibp14xGpXUASXBWRIGM7o92lxvDPfK1evgE8BgPhigmIVcnZ6EltuDniKZPsgX21LTmXNPyk20GF1QqPS2jt6SYti4DbPumbdbFkFqy-wgPsyURKTRSJ4NrAoUdeE2S5IyBsXaIKkq788U_1VBlAdIvkKTHAv5iAVD-dnJRZHVuS46L1FRiJnnU30shJoxIN3qO_1RKLihlUlbjSdQ7nQFZxlDyHu4h6evQADg9sLtMIydWGEToEr2K02RzFASEl00EVDBU5cbz-vErB-Kd8SzvRi8jitj0lw26f7t9UXu-0-2_1mlGkNIAnFdRlHp2FtPEW0P2e-5y5uLCRFGIe92hlFLpY-dOuyHLlhKbj_1j27ySPnWStm-vqznNloqnCvGemsL3JTu7iFqy8wxVs8E4DM8oMt9NfCdEQv8dJloLGLTp5AnQk2xhfrzcjQpPwqL7QqdRmeY9sL76SLsfHaQDhAAQcUSEmdDnX6kCgp3guWF29z3b3YTsILWFzQwSbKZ2YeMMdkhS7Majkft-lLcgNEA3o2ZYlAlFr8Ef8VP1JO6_1H8phwVfyVanVG0eards_1-nv9rNkGuqnIJLUg81TNERizIjiUYa0jWq2076rcp-MpqxQNS9y7d4woTlzLBLudBWVLKAf7ixELjwwTD9EHgESPWl82oayHocuKJPVjpRgtr743RP_1apfm-xNKD5Urb2hhA8bP9xyT5tLOArDSjZePams9UgPcQ4mvy1Hu0kw8a9eMpTd7wlBM7bsiG8n-i0PBZ2rhM-Ec5iYeTXOLTOAA4oENYpL50npWraIJceSL0PnDOU8OhoaNNwJP2Y1mjbiSZjWimSBWc_1NkpEVQM76Rh1dLEUa9VbD2Ga_13iCQvV9F6YQUJ_1dfnsb-qjKnQHjozpEK7OtieMBScFysW4jQPzZ346jL4XHoN13kUUKCjzV6vykr6zkVLwSqmtuVfaHA1-vIOQf3gUkBknjD4xmTd84EHlJzgRDhhnfoRDNDFKqdQ8m95OpOguYzNHXACIYFRn5IuL37mjRbs0E3x0OBvQp8anaelthBVlaTQd2m2NXRPsSDFAO9g&hl=en)
Gee, sorry I missed the part where it said "World's Longest Bridge" across the front of the picture.
Reverse image search, dude.
Quote from: Jardine on March 09, 2016, 01:19:15 PM
This is spectacular:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.dailymail.co.uk%2Fi%2Fpix%2F2011%2F06%2F30%2Farticle-2009748-0CCBFD6F00000578-504_964x521.jpg&hash=a106a55d5485f6f13369ba9383c64b6b52aad1b1)
The interchange of I-10 at I-310 is effectively the same thing (https://www.google.com/maps/place/I-310,+Louisiana/@30.003345,-90.2962843,1541m/data=!3m1!1e3!4m2!3m1!1s0x8620c640d32e1657:0x7e886e7fcb75a0f4), although it's in a swamp instead of open water.
Actually, I was thinking I95/395 in Bmore, with the thing off in the distance being a tunnel, not a suspension bridge.
Holy crap, instead of being so proud of how you know how to use the Google machine, how about providing a frickin answer?
MN 36/Rice St. in Roseville is the most original one locally. It's a diamond with all four ramps shunted to the north side of the freeway.
https://www.google.com/maps/place/Roseville,+MN/@45.0085679,-93.1063753,1084m/data=!3m1!1e3!4m2!3m1!1s0x52b32bb9adbbffd7:0xd3006c813195322f
Quote from: paulthemapguy on March 10, 2016, 02:34:44 AM
Holy crap, instead of being so proud of how you know how to use the Google machine, how about providing a frickin answer?
I'm teaching you assholes how to fish. Be happy.
Quote from: NE2 on March 10, 2016, 10:37:13 AM
Quote from: paulthemapguy on March 10, 2016, 02:34:44 AM
Holy crap, instead of being so proud of how you know how to use the Google machine, how about providing a frickin answer?
I'm teaching you assholes how to fish. Be happy.
Either that or teaching us to ignore everything you post.
Quote from: NE2 on March 10, 2016, 10:37:13 AM
Quote from: paulthemapguy on March 10, 2016, 02:34:44 AM
Holy crap, instead of being so proud of how you know how to use the Google machine, how about providing a frickin answer?
I'm teaching you assholes how to fish. Be happy.
Hm. Who's the real anus here? :D
...
Actually, I do like pulling out the "God invented Google for a reason" card when someone asks a public forum something like, "What's the population of the U.S.?"
Quote from: paulthemapguy on March 10, 2016, 02:34:44 AM
Holy crap, instead of being so proud of how you know how to use the Google machine, how about providing a frickin answer?
For any who doesn't want to search, it is the Jiaozhou Bay Bridge on G22 Qingdao-Lanzhou expressway near Qingdao, Shandong, China.
I think the I-95/I-395 MD interchange in Baltimore is similar to that, built over water.
I love the Michigan Lefts. Such a unique solution to a common problem.
As for Interchanges, Anything that either has, or was originally designed as, a 5+ way interchange, like I-5/I-405 at the end of the Freemont Bridge in Portland, OR.
https://www.google.com/maps/@45.5431569,-122.6777273,1494m/data=!3m1!1e3
Same goes for I-5/I/405/US 26/OR 43 at the Marquam bridge, in Portland, OR.
https://www.google.com/maps/@45.5025765,-122.6760286,1495m/data=!3m1!1e3
Finally... for now...
I-5 at Morrison Bridge in Portland.
https://www.google.com/maps/@45.518155,-122.6712865,1495m/data=!3m1!1e3
I have done a 540 on the Indiana Toll Road.
I'm surprised that someone hasn't mentioned the floating roundabout (https://www.google.com/maps/place/Metairie,+LA/@29.9744791,-90.1558937,773m/data=!3m1!1e3!4m2!3m1!1s0x8620b042adb34dc7:0xc2d71e7374f33ad1!6m1!1e1) at US 61 and Causeway Blvd. near New Orleans.
Quote from: lordsutch on March 09, 2016, 05:22:16 PM
Quote from: Jardine on March 09, 2016, 01:19:15 PM
This is spectacular:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.dailymail.co.uk%2Fi%2Fpix%2F2011%2F06%2F30%2Farticle-2009748-0CCBFD6F00000578-504_964x521.jpg&hash=a106a55d5485f6f13369ba9383c64b6b52aad1b1)
The interchange of I-10 at I-310 is effectively the same thing (https://www.google.com/maps/place/I-310,+Louisiana/@30.003345,-90.2962843,1541m/data=!3m1!1e3!4m2!3m1!1s0x8620c640d32e1657:0x7e886e7fcb75a0f4), although it's in a swamp instead of open water.
I think that's the difference between one being impressive and one being spectacular.
Doesn't the Google reverse image search feature work only in Chrome? Not everyone uses Chrome as their browser.
Locally:
The relatively new interchange of MD-295 (the Baltimore/Washington Parkway) with Arundel Mills Boulevard. It's unique because it's got a wrong-way overpass and crossover (https://www.google.com/maps/place/Columbia,+MD+21046/@39.1556713,-76.7456477,611m/data=!3m1!1e3!4m2!3m1!1s0x89b7de24b330a9bb:0xc6c840db879a9ff7). Eliminates weaving, but I have a feeling some highway engineer made that as a plan just because he could.
Also, the Department of Redundancy Department Interchange (https://www.google.com/maps/place/Columbia,+MD+21046/@39.2974316,-76.8272102,361m/data=!3m1!1e3!4m2!3m1!1s0x89b7de24b330a9bb:0xc6c840db879a9ff7) between US-29 N and I-70 W has always baffled me. The left turn that SHA put in does NOT reduce traffic delays as it was intended to do, and causes confusion.
A mile or so south of that you have the interchange between US 29 and US 40. The engineers who designed this one must have been smoking some good stuff (https://www.google.com/maps/place/Columbia,+MD+21046/@39.2768016,-76.8217484,1025m/data=!3m1!1e3!4m2!3m1!1s0x89b7de24b330a9bb:0xc6c840db879a9ff7).
MD-100 interchanges look like a highway engineer traveled to Massachusetts and fell in love with rotaries, then went to England and fell in love with left-hand exit ramps.
The I-95/MD-175 interchange is an interesting weave-eliminating design (https://www.google.com/maps/place/Columbia,+MD+21046/@39.1780921,-76.7921201,1130m/data=!3m1!1e3!4m2!3m1!1s0x89b7de24b330a9bb:0xc6c840db879a9ff7). I also find the reconfiguration of the I-95/MD-43 interchange to include the new Lexus Lanes (https://www.google.com/maps/place/Columbia,+MD+21046/@39.379557,-76.4497655,822m/data=!3m1!1e3!4m2!3m1!1s0x89b7de24b330a9bb:0xc6c840db879a9ff7) an interesting one. I'm sad to see the crossovers at the old I-95/I-695 northern interchange go with the construction of those same Lexus Lanes.
Not-so-locally, the interchange of the NYS Thruway with I-87 and I-90 in Albany has always been a head-scratcher for me (https://www.google.com/maps/place/Albany,+NY/@42.6950863,-73.8485857,2830m/data=!3m1!1e3!4m2!3m1!1s0x89de0a34cc4ffb4b:0xe1a16312a0e728c4). It looks like they had intended the Northway to make a more direct interchange with the Thruway but then changed their minds.
Quote from: hbelkins on March 11, 2016, 03:12:11 PM
Doesn't the Google reverse image search feature work only in Chrome? Not everyone uses Chrome as their browser.
Firefox here.
Quote from: tckma on March 11, 2016, 06:22:00 PM
Locally:
The relatively new interchange of MD-295 (the Baltimore/Washington Parkway) with Arundel Mills Boulevard. It's unique because it's got a wrong-way overpass and crossover (https://www.google.com/maps/place/Columbia,+MD+21046/@39.1556713,-76.7456477,611m/data=!3m1!1e3!4m2!3m1!1s0x89b7de24b330a9bb:0xc6c840db879a9ff7). Eliminates weaving, but I have a feeling some highway engineer made that as a plan just because he could.
A terminal DDI? Interesting! Someone took the diverging diamond and applied it to an interchange where the surface road ends. "I get that feeling of someone "[Making] that a plan just because he could," too, but I kinda feel that way about all DDI's. I like this application because it takes up less space than a trumpet, and it eliminates a flyover/bridge from a would-be free flow interchange.
Quote from: paulthemapguy on March 11, 2016, 11:52:05 PM
Quote from: tckma on March 11, 2016, 06:22:00 PM
Locally:
The relatively new interchange of MD-295 (the Baltimore/Washington Parkway) with Arundel Mills Boulevard. It's unique because it's got a wrong-way overpass and crossover (https://www.google.com/maps/place/Columbia,+MD+21046/@39.1556713,-76.7456477,611m/data=!3m1!1e3!4m2!3m1!1s0x89b7de24b330a9bb:0xc6c840db879a9ff7). Eliminates weaving, but I have a feeling some highway engineer made that as a plan just because he could.
A terminal DDI? Interesting! Someone took the diverging diamond and applied it to an interchange where the surface road ends. "I get that feeling of someone "[Making] that a plan just because he could," too, but I kinda feel that way about all DDI's. I like this application because it takes up less space than a trumpet, and it eliminates a flyover/bridge from a would-be free flow interchange.
I think it also allows for a potential extension of the road as well.
Is there any operational advantage of a terminal DDI versus a terminal diamond? Both are two-phase signals, though (in some states) a terminal diamond allows left turns on red.
Quote from: jakeroot on March 12, 2016, 03:03:52 PM
Is there any operational advantage of a terminal DDI versus a terminal diamond? Both are two-phase signals, though (in some states) a terminal diamond allows left turns on red.
I'm not sure I understand; there is no signal at the southbound ramps. A traditional diamond would require one, along with a three phase signal at the northbound ramps (although you wouldn't expect anyone on the off-ramp left).
I liked the Florida example, sort of a "continuous green" situation. Also kind of reminiscent of the "volleyball" tri-level.
Speaking of tri-level, here's a cool one in Kansas. You don't often see three routes cross at the same point, especially at a service interchange! https://www.google.com/maps/@38.8547549,-94.8158158,16.25z (https://www.google.com/maps/@38.8547549,-94.8158158,16.25z)
Quote from: tckma on March 11, 2016, 06:22:00 PM
Not-so-locally, the interchange of the NYS Thruway with I-87 and I-90 in Albany has always been a head-scratcher for me (https://www.google.com/maps/place/Albany,+NY/@42.6950863,-73.8485857,2830m/data=!3m1!1e3!4m2!3m1!1s0x89de0a34cc4ffb4b:0xe1a16312a0e728c4). It looks like they had intended the Northway to make a more direct interchange with the Thruway but then changed their minds.
That's essentially what happened. I-87 was intended to run parallel to the Thruway between I-90 and I-787, but that freeway was never built. More recently, the Thruway planned to build E-ZPass-only ramps to connect there, but that never happened either (I assume that idea is dead as the time to do it would have been with the recent widening).
Quote from: johndoe on March 12, 2016, 03:37:45 PM
Quote from: jakeroot on March 12, 2016, 03:03:52 PM
Is there any operational advantage of a terminal DDI versus a terminal diamond? Both are two-phase signals, though (in some states) a terminal diamond allows left turns on red.
I'm not sure I understand; there is no signal at the southbound ramps. A traditional diamond would require one, along with a three phase signal at the northbound ramps (although you wouldn't expect anyone on the off-ramp left).
Terminal diamonds do not permit U-turns (though frankly, I don't see why they need to). Here's an example of how, in terms of phases, terminal diamonds and terminal DDIs are the same:
Traffic drives on the left in this diagram.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FA7y4EcK.png&hash=92942d02635b4e3c22d7ad315491323170f29433)
Quote from: jakeroot on March 12, 2016, 03:03:52 PM
Is there any operational advantage of a terminal DDI versus a terminal diamond?
No, except perhaps slightly higher speeds on green.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.dawnet.com%2Ftraffic%2FIntDiagFlipped.jpg&hash=c17f17759069ed8f4aa67081f1e7b6b8d0ede7c9)
(Posting in reverse for those of us who can't think British on the fly)
Quote from: davewiecking on March 12, 2016, 05:56:39 PM
(Posting in reverse for those of us who can't think British on the fly)
The point is simply to demonstrate how both interchanges have two phases. LHD/RHD is not necessarily relevant (though, to prevent people from commenting on it, I did mention that my diagram was RHD when I first posted it).
Quote from: davewiecking on March 12, 2016, 05:56:39 PM
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.dawnet.com%2Ftraffic%2FIntDiagFlipped.jpg&hash=c17f17759069ed8f4aa67081f1e7b6b8d0ede7c9)
(Posting in reverse for those of us who can't think British on the fly)
I just wanted to say that, it was really clever of you to recognize to just do a mirror image, in order to flip the traffic across the whole diagram.
But I see what you all mean now, when you say there is no advantage to putting a terminal DDI over a terminal diamond. Some engineer must have just had a boner for DDI's.
Quote from: Mr_Northside on March 12, 2016, 02:44:05 PM
I think it also allows for a potential extension of the road as well.
I believe that's why VDOT is putting a DDI at the new interchange at US 460 and Southgate Drive (http://www.virginiadot.org/projects/salem/southgate_connector_-_blacksburg.asp) in Blacksburg; the ultimate plan is to build a new location roadway to the west as well.
Quote from: jakeroot on March 12, 2016, 04:38:55 PM
Quote from: johndoe on March 12, 2016, 03:37:45 PM
Quote from: jakeroot on March 12, 2016, 03:03:52 PM
Is there any operational advantage of a terminal DDI versus a terminal diamond? Both are two-phase signals, though (in some states) a terminal diamond allows left turns on red.
I'm not sure I understand; there is no signal at the southbound ramps. A traditional diamond would require one, along with a three phase signal at the northbound ramps (although you wouldn't expect anyone on the off-ramp left).
Terminal diamonds do not permit U-turns (though frankly, I don't see why they need to). Here's an example of how, in terms of phases, terminal diamonds and terminal DDIs are the same:
I would say that among the advantages of a DDI are that the left turn on-ramp will be more smooth and so more left turners can make the turn at full speed. Also, there is likely more space for exiting cars to wait for the light to change and not cause back ups on the main lanes of the expressway.
{I didn't find a version of the pic without lettering, sorry}
(https://i.imgflip.com/10pl1g.jpg)
:wow:
Quote from: Jardine on March 13, 2016, 03:20:51 PM
https://i.imgflip.com/10pl1g.jpg
I can't quite figure out what interchange that Photoshop is based off of. My original guess was the 110/105 interchange outside Hawthorna, Los Angeles, but the buildings don't match up, and neither do some of the ramp designs. Any ideas?
Quote from: paulthemapguy on March 12, 2016, 11:10:33 PM
Quote from: davewiecking on March 12, 2016, 05:56:39 PM
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.dawnet.com%2Ftraffic%2FIntDiagFlipped.jpg&hash=c17f17759069ed8f4aa67081f1e7b6b8d0ede7c9)
(Posting in reverse for those of us who can't think British on the fly)
I just wanted to say that, it was really clever of you to recognize to just do a mirror image, in order to flip the traffic across the whole diagram.
But I see what you all mean now, when you say there is no advantage to putting a terminal DDI over a terminal diamond. Some engineer must have just had a boner for DDI's.
But wouldn't cars be able to move through faster through the DDI light (remember, at the diamond light, everyone is making a left turn), thereby getting more people though even though the phases are the same length? It also eliminates the merge with the other ramp by making it signal controlled.
Quote from: vdeane on March 13, 2016, 03:42:16 PM
Quote from: paulthemapguy on March 12, 2016, 11:10:33 PM
But I see what you all mean now, when you say there is no advantage to putting a terminal DDI over a terminal diamond. Some engineer must have just had a boner for DDI's.
But wouldn't cars be able to move through faster through the DDI light (remember, at the diamond light, everyone is making a left turn), thereby getting more people though even though the phases are the same length? It also eliminates the merge with the other ramp by making it signal controlled.
The diamond design does possess a left-on-red scenario, which is legal from two-way roads in some states. I could see this being advantageous on occasion.
Quote from: jakeroot on March 13, 2016, 03:29:18 PM
Quote from: Jardine on March 13, 2016, 03:20:51 PM
https://i.imgflip.com/10pl1g.jpg
I can't quite figure out what interchange that Photoshop is based off of. My original guess was the 110/105 interchange outside Hawthorna, Los Angeles, but the buildings don't match up, and neither do some of the ramp designs. Any ideas?
A reverse image search (https://www.google.com/search?tbs=sbi:AMhZZistJ3EiG8gnDIB3J7MLdXvwdoQgxdYMYDugzbXAMXFTJ-Ppqnx3sZkDJtWAHo1dZc3LLHLZK9dsPUnt7mAZwdw6nZWiP7KYjMqw0cO91ebzIKscQSb5S5zAG1Vq_1H8K-fKezoSzmX7JedKl2Mqmm9Emd6UuM2GSQl6eDSBunhC5I_1g1aWXEt9UT-htZxclAQd41HtuNnGqpLOzFCWWf99uu5zuGRmhyRf3XsajMrlX5USUQodJuBe8MqgI8_1w-bZgz4DA9-aFMHja2ARgscXPAnWqRE0F_1w8wIh8SSDqLlqA6Dh4jYBbpqRpGC6XEjJJYJ_1a7QFnSuKCaV28tXkefgL-UkZSKzdUurs-Hah1o8IT4-37-SteI4WHHqG5MdBkMhdmsMzVIKbXkhB2hZPNb6QvcTG_1PHagdtR0XubyAGfNJkt3GywWWwCfZORqrwSjdDc3VmhSXxSPcSFhgzzULVR8hJj7NZ_15kmWU41KQ9J-BoPZvljkO3IWLiB8LyTUe0QzLJRno_1n3E79AE3EsMts5kvr_1b7V7CtGPm7IGrUwnFn87_1ImtXNY0erFzX96HoJ0ihpDF0TabmI0i8bC4JOMP3wg2tSA0HqsMVMqQcAV22f_1Xh-FsiNO1V0JcH5GVT7qSk9ZwcM89G7QE_1C-NXej05hNxq8FI5bnnySQyDlIQfh7VIwmMlk4qIRYZhQiqYFgMmYWZedopuxnJ6gcjkE_1u7Mun6_1az1XhNUfM3ljEmuodxOcjiAfDXgu7RZUbW2VNMpARVH72P_11PXTNEUq28kxFzyxbTkODjRvvW01jPNjw8duc5jf_1OLbJRK9ETiBUc-v9wNAItjgB4jydn93ACvUo6SemHXkZqtve5YZu6uNq3MxTbZa0OuWcSaMsZ8uEd5jcNt_1vT2edOZfdgVZN1ej_141sNancWZ1FgGwdRHspI2aWjCxXCBfnuqZlrg10tPZ7CRiPJDZ4cpOk_1TkA04vdbvSfiegV2y6W_1atT75utGM7dRf2Pu_1_1gwlipgoIEYL9FwuHLSdpHfUdmtblpsLvkzeOCiwNVAf0YP8_14ZzxEZiJNPD_14W1TcYJ6LB2_1aFs060VbMX0ecWyeLyywyPx0-DF1eJUYydyZMPXH8_1qmxJQL8tvTH_1Z9ldHtSnjLeodvQUw7XaT5sztRLWVFngL8yJjDTW5GaVQKH47mLzyBFkLomRwf0vBxqoqvwd1E3169TnY_1hR6w2D-nEVI-TA9NLGTnvnFF3lMLXkYLegCpsIZHzqrv3AUXnzqrdPhDFckUtYw4sbSQjN-L5CtWH1g8fdo16Af0OSrhaiCNnW5mK3Lj0OhiO965U8NUo9hncp91g12l9SI9s04VLofgWvu-5JaoDuWtopIDOZ8ufIu7NtIGQ9JGOVckiJNlgNgusPELoH8CTA6dfQHzRcQ0_1TqhMj1QUKGdMiqiy0W6fOk6SKF6YSn2rYs9-z_1KkgARU_1QHWJ6w9lvYjvy1l9kIqHlStKETtaIu9PoeyItB5n-Qj4BprmzWWIguPG8DuwiwMONXfK2Ss4FwOAkMwxm-9DpiaNkx1fdBJTtHQkV0fe1rJiE1pBNhRc9FLqPRMr0dfgenFEwe_1QjHQZ-ZqGHC81IqnXhyDy6DK3fh8tlvYVIjNUdb7bFRv2CZ9FCBYoJRSz8xTGljUnRZn6vEm0YI5bwXaXAYjA&hl=en) gets me to an LA Examiner (http://www.examiner.com/article/ucla-unearths-new-freeway-health-hazard-asthma-flare-ups) article. Then searching for that image gets me here (http://southland.gizmodo.com/l-a-s-freeway-interchanges-are-beautiful-if-youre-no-1556221283) where someone says "It originated from a forum for Dallas architecture. It's poking fun at The High Five on highway 635. Which looks somewhat similar, however obviously not that intricate." But it's definitely not the High Five. I give up; it could be heavily shopped with each area from a different interchange.
Quote from: jakeroot on March 13, 2016, 04:09:12 PM
Quote from: vdeane on March 13, 2016, 03:42:16 PM
Quote from: paulthemapguy on March 12, 2016, 11:10:33 PM
But I see what you all mean now, when you say there is no advantage to putting a terminal DDI over a terminal diamond. Some engineer must have just had a boner for DDI's.
But wouldn't cars be able to move through faster through the DDI light (remember, at the diamond light, everyone is making a left turn), thereby getting more people though even though the phases are the same length? It also eliminates the merge with the other ramp by making it signal controlled.
The diamond design does possess a left-on-red scenario, which is legal from two-way roads in some states. I could see this being advantageous on occasion.
Indeed, though that wouldn't help if traffic is high enough that ability to move quickly through the green is more important than whether a left on red could be made (and technically the diamond is a one-way and a two-way, which is legal less often). That could be moot though - the diagram was made in a country that drives on the left, and I don't know if "left" (right, really) on red is legal in any of those countries. I'm pretty sure it's a North American concept; while we take turns on red for granted, in many countries
any turns on red are strictly illegal.
Quote from: NE2 on March 12, 2016, 04:47:22 PM
Quote from: jakeroot on March 12, 2016, 03:03:52 PM
Is there any operational advantage of a terminal DDI versus a terminal diamond?
No, except perhaps slightly higher speeds on green.
That was the only advantage I could think of initially.
The only other idea that came to mind was if the terminal DDI is installed at a lower-volume location, you could potentially have one side of the crossover intersection be yield controlled. That could make the whole interchange almost free-flowing if you had an added/acceleration lane from the off ramp to the crossroad on the crossover side. But then again, it seems unlikely that a DOT would install a terminal DDI at a lower-volume interchange to begin with...
Quote from: vdeane on March 13, 2016, 04:38:55 PM
That could be moot though - the diagram was made in a country that drives on the left, and I don't know if "left" (right, really) on red is legal in any of those countries. I'm pretty sure it's a North American concept; while we take turns on red for granted, in many countries any turns on red are strictly illegal.
The diagram is RHD because the city that I was working on at the time (in Cities Skylines) was RHD. But, as I said to Paul above, the point is not RHD vs LHD. My diagram was simply to illustrate how both designs have two signal phases.
Quote from: roadfro on March 13, 2016, 05:00:30 PM
The only other idea that came to mind was if the terminal DDI is installed at a lower-volume location, you could potentially have one side of the crossover intersection be yield controlled. That could make the whole interchange almost free-flowing if you had an added/acceleration lane from the off ramp to the crossroad on the crossover side. But then again, it seems unlikely that a DOT would install a terminal DDI at a lower-volume interchange to begin with...
I seem to recall a crossover type interchange somewhere in the Northeast with the crossover using a yield sign. Perhaps someone else knows where it was.
Down here in Australia they've just completed a new sort of interchange, the first of its kind anywhere apparently.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fgatewaywa.com.au%2Fassets%2FUploads%2FRoe-Berkshire-Feb-2016.jpg&hash=2c74a9da5bb7c9de924ee3fb60a015ba1ce06b3c)
Fact sheet: http://gatewaywa.com.au/assets/Uploads/Roe-Highway-Berkshire-Road-Factsheet.pdf (http://gatewaywa.com.au/assets/Uploads/Roe-Highway-Berkshire-Road-Factsheet.pdf)
It's called a 'Tennis Ball Interchange', functionally the same as a standard diamond but... curvy...
According to the Main Roads department, the design will improve safety 'through decreasing the severity of potential impacts by a change in incident angle and a reduction in approach speed.' :eyebrow:
Quote from: Jet380 on March 14, 2016, 08:00:21 AM
Down here in Australia they've just completed a new sort of interchange, the first of its kind anywhere apparently.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fgatewaywa.com.au%2Fassets%2FUploads%2FRoe-Berkshire-Feb-2016.jpg&hash=2c74a9da5bb7c9de924ee3fb60a015ba1ce06b3c)
Fact sheet: http://gatewaywa.com.au/assets/Uploads/Roe-Highway-Berkshire-Road-Factsheet.pdf (http://gatewaywa.com.au/assets/Uploads/Roe-Highway-Berkshire-Road-Factsheet.pdf)
It's called a 'Tennis Ball Interchange', functionally the same as a standard diamond but... curvy...
According to the Main Roads department, the design will improve safety 'through decreasing the severity of potential impacts by a change in incident angle and a reduction in approach speed.' :eyebrow:
LOLOLOLOL Look at all the merging issues they're going to have from the cars merging in from the left! Apparently some engineer has never considered what happens when through traffic wants to exit to one side right after traffic enters the road from that same side, the problem with every basic cloverleaf ever. They just took right-side weave issues and moved them to the left, unless there's a configuration of signal phases I haven't thought of.
Quote from: paulthemapguy on March 14, 2016, 10:05:48 AM
Quote from: Jet380 on March 14, 2016, 08:00:21 AM
Down here in Australia they've just completed a new sort of interchange, the first of its kind anywhere apparently.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fgatewaywa.com.au%2Fassets%2FUploads%2FRoe-Berkshire-Feb-2016.jpg&hash=2c74a9da5bb7c9de924ee3fb60a015ba1ce06b3c)
Fact sheet: http://gatewaywa.com.au/assets/Uploads/Roe-Highway-Berkshire-Road-Factsheet.pdf (http://gatewaywa.com.au/assets/Uploads/Roe-Highway-Berkshire-Road-Factsheet.pdf)
It's called a 'Tennis Ball Interchange', functionally the same as a standard diamond but... curvy...
According to the Main Roads department, the design will improve safety 'through decreasing the severity of potential impacts by a change in incident angle and a reduction in approach speed.' :eyebrow:
LOLOLOLOL Look at all the merging issues they're going to have from the cars merging in from the left! Apparently some engineer has never considered what happens when through traffic wants to exit to one side right after traffic enters the road from that same side, the problem with every basic cloverleaf ever. They just took right-side weave issues and moved them to the left, unless there's a configuration of signal phases I haven't thought of.
For starters, they drive on the opposite side of the road (compared to USA drivers), so their normal merging should be on the left.
Aside from that, I'm not sure where the "Change in incident angles" are at. Many of the actual intersections are still 90 degree (or very close to it) angles.
And what's with that island separation for traffic coming from the top to the bottom? I can't see why that's really necessary.
Another thing to consider. Looks like there's a lot of warehouses there. Warehouses = trucks. Trucks prefer straight roads, not tightly curved roads.
Quote from: Buffaboy on March 02, 2016, 01:56:51 PM
Quote from: Henry on March 01, 2016, 10:37:29 AM
The I-85/I-77 interchange (https://www.google.com/maps/@35.2723406,-80.8443454,1836m/data=!3m1!1e3) in Charlotte also comes to mind. What makes it intriguing is the double-crossover that I-77 does there, allowing the two loop ramps (to I-85) and the two left-turn ramps (from I-85) to be placed in the middle.
And speaking of I-77 in Charlotte, the two junctions with I-277 (at the Brookshire (https://www.google.com/maps/@35.2431445,-80.8482998,1095m/data=!3m1!1e3) and Belk Freeways (https://www.google.com/maps/@35.2235712,-80.8660624,776m/data=!3m1!1e3)) also make an interesting case of their own.
The Cyclone (I-85/I-485) earns an honorable mention
Forgot about that one! (https://www.google.com/maps/@35.3473945,-80.7334667,1833m/data=!3m1!1e3) It, and I-295/FL 202 in Jacksonville (https://www.google.com/maps/@30.2509092,-81.5155578,1941m/data=!3m1!1e3), are copycats of the Chicago example I posted earlier; therefore, I refer to them as Circle South (I for the latter, II for the former).
Quote from: jeffandnicole on March 14, 2016, 10:23:55 AM
And what's with that island separation for traffic coming from the top to the bottom? I can't see why that's really necessary.
To help solidify that the right lane is right-turn only. No different than the splitters sometimes seen at roundabouts: https://goo.gl/fzKl47
Quote from: jeffandnicole on March 14, 2016, 10:23:55 AM
Another thing to consider. Looks like there's a lot of warehouses there. Warehouses = trucks. Trucks prefer straight roads, not tightly curved roads.
Australian truckers are pretty used to roundabouts, so I don't think they'll have any trouble getting used to this.
Here is a real life example of a terminal DDI:
https://www.google.com/maps/@39.15612,-76.74517,425m/data=!3m1!1e3
Quote from: tradephoric on March 14, 2016, 02:39:18 PM
Here is a real life example of a terminal DDI:
https://www.google.com/maps/@39.15612,-76.74517,425m/data=!3m1!1e3
Something like that makes a lot of sense, especially if traffic that needs to make the right turn is high.
Quote from: tradephoric on March 14, 2016, 02:39:18 PM
Here is a real life example of a terminal DDI:
https://www.google.com/maps/@39.15612,-76.74517,425m/data=!3m1!1e3
...which appears to be the exact same one I posted to start off this lively discussion. :)
:sombrero:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi1.ytimg.com%2Fvi%2Fq1ISoecZqFs%2Fhqdefault.jpg&hash=43102723c75b3b0598b24d6997efae427c8368ed)
Quote from: paulthemapguy on March 14, 2016, 10:05:48 AM
LOLOLOLOL Look at all the merging issues they're going to have from the cars merging in from the left! Apparently some engineer has never considered what happens when through traffic wants to exit to one side right after traffic enters the road from that same side, the problem with every basic cloverleaf ever. They just took right-side weave issues and moved them to the left, unless there's a configuration of signal phases I haven't thought of.
I think the point still stands (as long as you reverse the directions :spin:) but considering the interchange is signalised with all movements protected, it won't really be a 'merging' situation.
And Jakeroot is spot on with the splitters being similar to what you get at roundabouts - they're also made to stop drivers from changing lanes in order to take the corner in more of a 'racing line', thus reducing speeds. The 'speed kills' mentality is king here!
Quote from: tckma on March 14, 2016, 05:47:41 PM
Quote from: tradephoric on March 14, 2016, 02:39:18 PM
Here is a real life example of a terminal DDI:
https://www.google.com/maps/@39.15612,-76.74517,425m/data=!3m1!1e3
...which appears to be the exact same one I posted to start off this lively discussion. :)
Oops. Didn't notice.
If you've ever been on alpsroads.net, you've probably noticed these massive interchanges:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.alpsroads.net%2Froads%2F10way.jpg&hash=6361e5cd430cc97066e3c9875e30edeacf9b9f73)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.alpsroads.net%2Froads%2F11way.jpg&hash=d5257968e70d049a8fe9adc14330600e179d2e43)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.alpsroads.net%2Froads%2F12way.jpg&hash=8a44b3f63c7593c87c9ad531267d46ff465545e7)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.alpsroads.net%2Froads%2Fdinner.jpg&hash=5c4750c4c1fa16b83fb2e6c8392c7836a0a7e838)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.alpsroads.net%2Froads%2Fmap.png&hash=d4fc2048b8022eec57f93b65873db9fc9c768dc4)
Quote from: Henry on March 15, 2016, 10:48:03 AM
If you've ever been on alpsroads.net, you've probably noticed these massive interchanges: <snip>
Do these represent real interchanges or just concepts?
Sometimes I imagine how metro systems would look like if they were freeways. When three or more lines meet, things get interesting. I still have to do New York, however...
Quote from: jbnv on March 15, 2016, 11:18:22 AM
Quote from: Henry on March 15, 2016, 10:48:03 AM
If you've ever been on alpsroads.net, you've probably noticed these massive interchanges: <snip>
Do these represent real interchanges or just concepts?
Clearly, those are concepts of interchanges that most likely don't exist. However, I can see the one on the bottom exist somewhere in the real world.
This is an interchange concept I designed at age 18, wondering what I would do if three interstates intersected at the same place. All vehicles have a ramp connection to all directions on all other highways. Takes up a lot of ROW but I tried to keep most ramps within the triad of thru-lanes.
(https://farm2.staticflickr.com/1559/25809305366_6416ddde94_z.jpg) (https://flic.kr/p/FjFriy)
How about this one? (https://www.google.com/maps/place/Edgewater,+MD/@38.8978303,-76.7218223,1225m/data=!3m1!1e3!4m2!3m1!1s0x89b7f3f2fbca33c5:0xe58d5c0f28366abb!6m1!1e1)
Quote from: tckma on March 16, 2016, 03:41:20 PM
How about this one? (https://www.google.com/maps/place/Edgewater,+MD/@38.8978303,-76.7218223,1225m/data=!3m1!1e3!4m2!3m1!1s0x89b7f3f2fbca33c5:0xe58d5c0f28366abb!6m1!1e1)
Did they really need to keep that piece of Hwy. 978?
Quote from: jbnv on March 16, 2016, 04:25:10 PM
Did they really need to keep that piece of Hwy. 978?
Judging by GMSV, it isn't signed as such. It's signed as "To South US-301," or "To East MD-214," for example.
cl94 posted a link that also lead to another one. I believe I-10 and US 29 has something similar to what's here (http://www.weathergraphics.com/tim/dumbroad/freak.htm). Also, below that is an example of how to screw up the traffic flow for cloverleaf interchanges with suburban sprawl. Another example is the cloverleaf between Suffolk CR 97 and the service roads of NY 27 (https://www.google.com/maps/@40.7731652,-73.048867,16z/data=!3m1!1e3).
BTW, if we're going to go with fictional interchanges as Paul The Map Guy did, does anybody remember my invention known as the Pelham Interchange?
Quote from: D-Dey65 on March 16, 2016, 08:22:02 PM. Another example is the cloverleaf between Suffolk CR 97 and the service roads of NY 27 (https://www.google.com/maps/@40.7731652,-73.048867,16z/data=!3m1!1e3).
I had an uncle who lived in Islip. I remember my father constantly complaining about the interchange between NY-27 and Connetquot Avenue (which when I was a kid I thought he was saying "Connecticut Ave"), about how it was confusing to have to get on the C/D road (he doesn't know that term and back then I didn't either). I just remember him consistently passing the exit and having to turn around on Montauk Highway. The exits around there make no sense. Why bother with a cloverleaf between Suffolk CR 97 and NY-27 if you can't get from 97 south to 27 east without exiting again at the next exit off 27?
Quote from: D-Dey65 on March 16, 2016, 08:22:02 PM
BTW, if we're going to go with fictional interchanges as Paul The Map Guy did, does anybody remember my invention known as the Pelham Interchange?
What did that look like? Do you still have a pic?
And while we're on the subject, here are the intersections/interchanges that I've dreamed up:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.geocities.ws%2Fhenryewatson%2Finterchanges1.jpg&hash=4a8dea22a28f3811dcd88ff0b3e81b7290e09c34)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.geocities.ws%2Fhenryewatson%2Finterchanges2.jpg&hash=c4d70e7b0ccfe9fb5307f38ea2254a02ec2a2656)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.geocities.ws%2Fhenryewatson%2Finterchanges3.jpg&hash=9b000f617183ee4f145ad6bb11029e4c84bdac9a)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.geocities.ws%2Fhenryewatson%2Finterchanges4.jpg&hash=b40d474deeef007fb254c0c7cb343483eb32009c)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.geocities.ws%2Fhenryewatson%2Finterchanges5.jpg&hash=f812c7cc2aca371792bbec727747551383b880d1)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.geocities.ws%2Fhenryewatson%2Finterchanges6.jpg&hash=3f7e08369e12c76ac4f69e3cedee5ee13f3f77f1)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.geocities.ws%2Fhenryewatson%2Finterchanges7.jpg&hash=476c6cf4c572e9beb5e4443b93a6da24e31ca3f4)
The complete details are found here (http://www.geocities.ws/henryewatson/dreaminterchanges.html).
Quote from: D-Dey65 on March 16, 2016, 08:22:02 PM
an example (http://www.weathergraphics.com/tim/dumbroad/freak.htm) of how to screw up the traffic flow for cloverleaf interchanges with suburban sprawl.
This is a common problem in Louisiana. The frontage roads have their own intersections, and traffic backs up very easily on those roads. For example, I-10 at US 61 (https://www.google.com/maps/place/Baton+Rouge,+LA/@30.4215772,-91.0768594,15z/data=!4m2!3m1!1s0x86243867325f74cb:0x2123f1db91579a1d).
Quote from: Henry on March 17, 2016, 10:29:59 AM
What did that look like? Do you still have a pic?
I have it somewhere in my files, and I also had a link, but ImageShack deleted it.