I know that there are some strange interchanges that we all know. We can probably put a list ten miles long on it, but I thought that it would be interesting to post!
In New Jersey where I grew up we not only had the tangle in Woodbridge and Newark, but many local roads to major highways as well!
US 22 and Bloy Street in Hillside,NJ! It is simple, but actually has no ramps! Bloy Street itself intersects US 22 at grade being a pair of right in and right outs! There is a connector that crosses over US 22 to the west and intersects Bloy Street on both sides of US 22 and therefore you actually leave Bloy Street to continue across US 22, but it does not seem like it and locals due refer to it still as Bloy Street anyway!
NJ 35 in Keyport, NJ has an interchange with both Maple Place and Broadway at the same time using one overpass! Maple Place on the east has a dead end stub at NJ 35 and Broadway (Lloyd Road) has a stub west of NJ 35 with the other two roads Maple Place from the west and Broadway from the east being the on and off to NJ 35. The overpass connector has two signalized intersections on both sides with Broadway to the east and Maple Place to the west and continuing across to their other roads shy of the stubs. See google maps for more on this, as I do not think I can explain this one for all to understand.
US 22 and CR 531 in North Plainfield has a connector with Somerset Street and Watchung Avenue being right ins and right outs.
How about the Willowbrook Interchange on I-80 in Wayne, NJ leaving out eastbound ramps to NJ 23 considering that one of New Jerseys largest malls is at that intersection! All other movements are possible, but there is no plans for NJDOT to correct this!
You exclaim too often!
Just about anything on I-81 between either end of I-481 counts (except for I-90 and 7th North St).
The "bowtie" in Poughkeepsie between US 9 and US 44 and the area, due to all those left exits/entrances.
US 501 at SC 31, it's so weird to me I have no idea why it was built that way
The junction of I-85 & I-77/US 21 in Charlotte NC, the carriageways of I-77 cross over before and after the I-85 interchange.
Quote from: ausinterkid on March 26, 2011, 06:05:39 PM
The junction of I-85 & I-77/US 21 in Charlotte NC, the carriageways of I-77 cross over before and after the I-85 interchange.
How about the I-65 and I-20/ I- 59 interchange in Birmingham, AL
Quote from: 74/171FAN on March 26, 2011, 04:58:22 PM
US 501 at SC 31, it's so weird to me I have no idea why it was built that way
It's an interesting tradeoff:
- left exits and entrances on SC 31 (bad)
- no weaving (good)
- smaller footprint than a conventional cloverleaf (good)
- lower elevation than a multilevel interchange (good)
I-96/I-696/M-5 in Novi - one of the largest freeway interchanges in America: http://maps.google.com/maps?hl=en&ie=UTF8&ll=42.481909,-83.433352&spn=0.025763,0.112267&t=k&z=14
I-496/US-127/Trowbridge Rd in Lansing - the main way to MSU: http://maps.google.com/maps?hl=en&ie=UTF8&ll=42.724475,-84.506707&spn=0.012831,0.056133&t=k&z=15
I-96/I-69 northwest of Lansing - it's so big that it has two different numbers (I-69 EB is Exit 91 on I-96 WB and Exit 89 on I-96 EB): http://maps.google.com/maps?hl=en&ie=UTF8&ll=42.785638,-84.663219&spn=0.025637,0.112267&t=k&z=14
US-131/M-6/68th St in Cutlerville - a cloverleaf with a diamond connected to it: http://maps.google.com/maps?hl=en&ie=UTF8&ll=42.846678,-85.676966&spn=0.012806,0.056133&t=k&z=15
I-196/US-131 and I-196/Ottawa Ave in downtown Grand Rapids - two for the price of one: http://maps.google.com/maps?hl=en&ie=UTF8&ll=42.972753,-85.674584&spn=0.00639,0.028067&t=k&z=16
I-196/M-45 in Grand Rapids - mostly free-flowing despite M-45 being a surface street: http://maps.google.com/maps?hl=en&ie=UTF8&ll=42.965939,-85.70647&spn=0.006391,0.028067&t=k&z=16
I-196/M-11, I-196/Baldwin St, and I-196/M-121 - three for the price of one (the Baldwin St ramps were just recently added): http://maps.google.com/maps?hl=en&ie=UTF8&ll=42.909606,-85.773611&spn=0.025586,0.112267&t=k&z=14
Also, I-96/US-131/M-37, I-96/US-31, and I-96/I-196/M-37/M-44, posted in Bad Interchanges.
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Borger,+TX&aq=0&sll=35.661071,-101.39794&sspn=0.005056,0.013078&gl=us&ie=UTF8&hq=&hnear=Borger,+Hutchinson,+Texas&ll=35.661114,-101.400214&spn=0.005056,0.017166&t=k&z=17
Borger, TX Interchange between TX136, TX207 and Wilson Street
Pretty much all the interchanges on the Parkway East (I-376) here in the 'Burgh (the general region, not just the city proper) are strange and somewhat unique. (Including, but certainly not limited to, the Squirrel Hill IC, which features a bridge carrying "wrong way" traffic over the parkway... The Penn Hills IC with PA 791 is almost a "normal" trumpet, but it has spurs for PA 791 to continue and end at Business 22)
Penna Turnpike at I-95, taking the General Lee approach.
I-69 at Coldwater Road in Fort Wayne, IN. Loop ramps, left merges, and an usual connector road for a side street in the median next to an old cemetery.
Someone needs to explain this one:
http://maps.google.com/maps?q=38.948333,-92.333889&ie=UTF8&ll=38.962279,-92.293053&spn=0.047184,0.077162&z=14
Quote from: InterstateNG on March 30, 2011, 03:28:21 PM
Someone needs to explain this one:
http://maps.google.com/maps?q=38.948333,-92.333889&ie=UTF8&ll=38.962279,-92.293053&spn=0.047184,0.077162&z=14
I can see why they did it (no room for an interchange with the new 63 freeway) but the lack of a freeway-to-freeway connection is still going to be jarring to drivers.
Just went through that many times this past weekend. Going north-south through it or east-west is a breeze. The pain is when you come north from Jeff City and head west on I-70 your going 65 mph then have to come to three stop lights to get on I-70. Or when you exit I-70 and head south on 63 toward Jeff City it is two lanes as you head under SB 63 to connect, but your merging into traffic that itself is coming off a curve and you are on a curve and headin up as one of your lanes ends, then the lane your end becomes the exit lane for MO WW. Can be confusing the first time.
A half hour south of there I have found the U.S. 50/54/63 interchange in Jeff City to be a bit strange.
Yeah, with the old interchange there and probably limited ROW, they did, essentially, what US35 does in Ohio when it crosses I-70. At least a freeway is maintained through the interchange, even if the offramps require lights, etc.
I believe you mean I-71:
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Dayton,+OH&aq=&sll=37.0625,-95.677068&sspn=48.555061,79.013672&ie=UTF8&hq=&hnear=Dayton,+Montgomery,+Ohio&ll=39.62278,-83.607073&spn=0.023238,0.038581&z=15
I find US 30 at I-83 to be strange in a way. Obviously, the freeway never made it through York. But my best free way home from Baltimore is to take 83-30-222-78. The connection from 83 to 30 requires waiting at just one traffic light. When I get to 30, I can RTOR and the freeway starts. The strange part is that there's no development along this well-traveled and important link! You could easily build a two-lane freeway connector running between 83 and 30 at these points, despite the apparent impossibility of ever connecting the other six interchange movements.
My hometown interchange, US 11 and I-80.
Left exits and entrances galore, extensive weaving and and to get from US 11 North to I-80 west, a short, tight U-turn ramp followed by crossing two lanes of US 11 S!
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Lime+Ridge,+PA&aq=1&sll=38.968352,-92.291679&sspn=0.014982,0.038152&ie=UTF8&hq=&hnear=Lime+Ridge,+Columbia,+Pennsylvania&ll=41.033755,-76.33863&spn=0.007268,0.019076&t=h&z=16
QuoteThe connection from 83 to 30 requires waiting at just one traffic light.
Two. The light at Market St (PA 462), and the light in front of Rutters, which is usually where I top off the gas tank when I make my own Baltimore-York-Lancaster-and-beyond runs.
I wouldn't quite say there's "no development" either. There's a car dealer and a fair bit of industrial development on both sides of North Hills Rd (the connector road in question) between the railroad and US 30...enough to where you'd have to take out at least one business/building (and probably 1-2 more) in order to build the connector you suggest.
Quote from: froggie on April 01, 2011, 10:02:22 AM
QuoteThe connection from 83 to 30 requires waiting at just one traffic light.
Two. The light at Market St (PA 462), and the light in front of Rutters, which is usually where I top off the gas tank when I make my own Baltimore-York-Lancaster-and-beyond runs.
I wouldn't quite say there's "no development" either. There's a car dealer and a fair bit of industrial development on both sides of North Hills Rd (the connector road in question) between the railroad and US 30...enough to where you'd have to take out at least one business/building (and probably 1-2 more) in order to build the connector you suggest.
OK, forgot the second light, true. But "no development" = pretty easy to take out vs. homes or dense commercial.
Except that you have dense industrial, which would be just as difficult to take out as dense commercial.
Back on topic, while it's nominally a standard par-clo, the ramp geometry at the US 68/OH 15 interchange (http://maps.google.com/?ie=UTF8&ll=40.992451,-83.650825&spn=0.011224,0.02738&t=k&z=16) near Findlay can certainly be categorized as strange.
This is the third thread I've posted in that the interchange at Breezewood (http://maps.google.com/?ie=UTF8&ll=39.992443,-78.238535&spn=0.034588,0.084543&t=h&z=14) fits the topic. (#1 (https://www.aaroads.com/forum/index.php?topic=4277.msg94111#msg94111), #2 (https://www.aaroads.com/forum/index.php?topic=4384.msg96164#msg96164))
Quote from: deanej on March 26, 2011, 11:46:06 AM
Just about anything on I-81 between either end of I-481 counts (except for I-90 and 7th North St).
What about the C-D roads between the airport and Taft Rd? Also, quite a few of the downtown interchanges are just variations of diamonds. The interchanges at the Carousel Center and I-690 are the strangest, IMO. In 4th grade, I redesigned the I-81/US 11 interchange in Mattydale.
Quote from: mightyace on April 01, 2011, 02:36:00 AM
My hometown interchange, US 11 and I-80.
Left exits and entrances galore, extensive weaving and and to get from US 11 North to I-80 west, a short, tight U-turn ramp followed by crossing two lanes of US 11 S!
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Lime+Ridge,+PA&aq=1&sll=38.968352,-92.291679&sspn=0.014982,0.038152&ie=UTF8&hq=&hnear=Lime+Ridge,+Columbia,+Pennsylvania&ll=41.033755,-76.33863&spn=0.007268,0.019076&t=h&z=16
I don't see why this isn't just a folded diamond.
Some more from Michigan:
I-96/M-104/112th Ave in Nunica (US-31 will come in here as well when/if it is completed): http://maps.google.com/maps?hl=en&ie=UTF8&ll=43.073684,-86.072216&spn=0.012759,0.056133&t=k&z=15
I-96/16th Ave in Marne (it looks like I-96 was built right through the middle of town): http://maps.google.com/maps?hl=en&ie=UTF8&ll=43.037905,-85.826043&spn=0.003192,0.014033&t=k&z=17
I-94/US-127 in Jackson (US-127 comes in from the north as a freeway): http://maps.google.com/maps?hl=en&ie=UTF8&ll=42.272371,-84.426949&spn=0.006462,0.028067&t=k&z=16
From Georgia: I-75/I-85/I-20 in downtown Atlanta: http://maps.google.com/maps?hl=en&ie=UTF8&ll=33.744468,-84.389999&spn=0.007262,0.028067&t=k&z=16
The majority of interchanges on I-75 between Macon and the Florida line look exactly the same.
Quote from: Michael on April 06, 2011, 11:31:28 AM
Quote from: mightyace on April 01, 2011, 02:36:00 AM
My hometown interchange, US 11 and I-80.
Left exits and entrances galore, extensive weaving and and to get from US 11 North to I-80 west, a short, tight U-turn ramp followed by crossing two lanes of US 11 S!
I don't see why this isn't just a folded diamond.
I don't know either. I-80 goes uphill west of the interchange but the Milesburg exit (#158) has similar constraints. Railroad tracks on the east side of the interchange and the hill is
much longer and steeper than that at exit 241.
The only thing I can think of is that this design keeps traffic free flowing on both US 11 and most of the ramps to/from I-80.
Milesburg:
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Milesburg,+PA&aq=0&sll=37.0625,-95.677068&sspn=31.977057,79.013672&ie=UTF8&hq=&hnear=Milesburg,+Centre,+Pennsylvania&ll=40.956162,-77.770243&spn=0.007438,0.01929&t=h&z=16
I-90/94 in Downtown Chicago comes to mind...
Quote from: pianocello on April 10, 2011, 03:11:26 PM
I-90/94 in Downtown Chicago comes to mind...
Which I-90/94 interchange? The Edens Junction or the Skyway Junction? Granted the Circle Interchange can be a bit strange, but that's at I-90/94 (Ryan and Kennedy Expys) and I-290 (Ike Expy and Congress Pkwy).
Quote from: ausinterkid on March 26, 2011, 06:05:39 PM
The junction of I-85 & I-77/US 21 in Charlotte NC, the carriageways of I-77 cross over before and after the I-85 interchange.
I-95 and I-695 north of Baltimore used to do that when they met, but now it's a conventional stack interchange.
Quote from: Brandon on April 10, 2011, 03:44:00 PM
Quote from: pianocello on April 10, 2011, 03:11:26 PM
I-90/94 in Downtown Chicago comes to mind...
Which I-90/94 interchange? The Edens Junction or the Skyway Junction? Granted the Circle Interchange can be a bit strange, but that's at I-90/94 (Ryan and Kennedy Expys) and I-290 (Ike Expy and Congress Pkwy).
He said Downtown Chicago, so he can't mean the Edens or the Skyway, because one interchange lies to the north of there, and the other to the south. And I believe you answered his question with the circle interchange thing.
QuoteI-95 and I-695 north of Baltimore used to do that when they met, but now it's a conventional stack interchange.
Not completely true. The I-695 carriageways still cross each other through the interchange.
Quote from: froggie on April 14, 2011, 12:27:09 PM
QuoteI-95 and I-695 north of Baltimore used to do that when they met, but now it's a conventional stack interchange.
Not completely true. The I-695 carriageways still cross each other through the interchange.
US-131 does the same thing at I-196. Also, the carriageways for I-196 are at different levels, one going over US-131 and the other going under.
Actually, I was referring to the string of interchanges between the circle and Ohio Street, but the Circle interchange is also pretty strange.
How about the O Hare Interchange between I-90, I-190, and I-294. There is no exit to EB I-190 from NB I-294 spite that there is a WB to SB ramp there. Instead there is a direct interchange to I-90 EB where I-190 goes anyhow. There is no WB I-90 to SB I-294 and therefore uses I-190 to make the connection!
I am guessing it all has to do with the tolling as all exits from both toll roads to the airport here need them cause the mainline plazas are only halfees and are split to either side of J-90 and I-190 on 294 and one heading west on I-90. Of course the Illinois Tollway Authority is not going to let you pass by without paying toll.
Quote from: roadman65 on April 14, 2011, 09:58:28 PM
How about the O Hare Interchange between I-90, I-190, and I-294. There is no exit to EB I-190 from NB I-294 spite that there is a WB to SB ramp there. Instead there is a direct interchange to I-90 EB where I-190 goes anyhow. There is no WB I-90 to SB I-294 and therefore uses I-190 to make the connection!
I am guessing it all has to do with the tolling as all exits from both toll roads to the airport here need them cause the mainline plazas are only halfees and are split to either side of J-90 and I-190 on 294 and one heading west on I-90. Of course the Illinois Tollway Authority is not going to let you pass by without paying toll.
Not at all. There's just no point to a ramp there except for River Rd. The only exit is for River Rd, and that can accessed via different ramps. The deficiency in this regard exists for both SB I-294 and EB I-90, and it's worse for EB I-90.
Quote from: pianocello on April 14, 2011, 09:31:20 PM
Actually, I was referring to the string of interchanges between the circle and Ohio Street, but the Circle interchange is also pretty strange.
The Rapid-Fire Ramps on the Kennedy Expy. One block apart each and right exit, left entry. Lots of fun to merge from. :ded:
Quote from: Brandon on April 15, 2011, 09:20:57 AM
Quote from: pianocello on April 14, 2011, 09:31:20 PM
Actually, I was referring to the string of interchanges between the circle and Ohio Street, but the Circle interchange is also pretty strange.
The Rapid-Fire Ramps on the Kennedy Expy. One block apart each and right exit, left entry. Lots of fun to merge from. :ded:
Totally forgot about that one! At least it's not as bad as this mess of ramps on I-277 in Charlotte:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fimg826.imageshack.us%2Fimg826%2F3816%2Fi277.gif&hash=459bbc59d0f17becbca26dcb22f273b162189a8e) (http://img826.imageshack.us/i/i277.gif/)
Uploaded with ImageShack.us (http://imageshack.us)
And try navigating through this inverted cloverleaf at I-77:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fimg801.imageshack.us%2Fimg801%2F655%2Fi277b.gif&hash=bee15a5261ef9b1471a7788a9b01206cb45841ef) (http://img801.imageshack.us/i/i277b.gif/)
Uploaded with ImageShack.us (http://imageshack.us)
If you're arriving on the I-77 C/D roads, MERGE IMMEDIATELY! Or you'll find yourself continuing onto the road you just exited from.
^^
That Charlotte interchange looks more like the Spaghetti Junction on I-85 near the ATL. Perhaps more so.
Quote from: froggie on April 14, 2011, 12:27:09 PM
QuoteI-95 and I-695 north of Baltimore used to do that when they met, but now it's a conventional stack interchange.
Not completely true. The I-695 carriageways still cross each other through the interchange.
Is that not going to get fixed?
Just as with the express lane ramps, it got deferred due to cost and MdTA's recent funding issues.
Actually, a fix will be underway soon. MdTA has just advertised a radically descoped version of the original Phase II contract:
http://www.mdta.maryland.gov/Contracts/Construction/contracts/KH/KH1302.html
Construction is still going forward according to the original plan but a considerable amount of the work is being deferred to the future (e.g., one major flyover bridge will have only three piers built under this contract, with the other piers and superstructure coming later).
As I understand it, that project is to construct the ETLs through the 95/695 interchange, and will not involve the I-695 mainline lanes.
CT-8 SB in Waterbury, CT has a right and left on-ramp, both with no merge time at the same spot!
The right on-ramp comes from I-84 and the left is from a side street. Who designed this!?!?! The worse part this opened in 1969, so design standards were improved by then.
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=waterbury,+ct&aq=&sll=37.0625,-95.677068&sspn=37.052328,67.412109&ie=UTF8&hq=&hnear=Waterbury,+New+Haven,+Connecticut&ll=41.550379,-73.050043&spn=0.00107,0.003079&t=h&z=19
WTF!
Good news, this whole interchange is slated to become a 4-level stack. Of course, no funding.
Quote from: froggie on April 17, 2011, 04:37:42 PMAs I understand it, that project is to construct the ETLs through the 95/695 interchange, and will not involve the I-695 mainline lanes.
Yup, it won't finish off this interchange--I estimate that the plans set for the contract just advertised has about one-third to one-half the sheet count of the full Phase II plans set. My impression, on a cursory review of the sign layouts and roadway plan sheets, is that MdTA is trying to deliver a down payment on I-95 congestion relief and get the ETLs up and running so they can start making money. I don't know when the remainder of the work will get done, but at least this contract is a start, which is more than I expected a few months ago when all the indications were that Phase II had been shelved indefinitely.
Meet the Baltimore Spiral, which is not too far from the two tunnels:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fimg808.imageshack.us%2Fimg808%2F7639%2Fbostonodonnell.gif&hash=d8b5979b433c731f5b6f34760b52b50d1a2a7fc0) (http://img808.imageshack.us/i/bostonodonnell.gif/)
Uploaded with ImageShack.us (http://imageshack.us)
Isn't any interchange on a closed-system toll road (ticket based) a strange one? Trumpet interchanges to a single side of the road (or a cloverleaf/trumpet/stack in the case of freeways) to accommodate getting ticket/paying toll/scanning transponder combo?
Madison Beltline at Verona Road (where US 18/151 split from US 12/14) - not so much as "strange" as it is a diamond connecting a surface road to a freeway, but the traffic on Verona Road south is much deserving of a freeway (a study is being conducted on a plan to put a SPUI in first to connect the the two routes, then route 18/151 using a depressed direct connection to the beltline to the east where the SPUI would serve Verona Road's local traffic that essentially becomes a pair of frontage roads paralleling the freeway in the middle. The frontage roads eventually merge with the freeway further south - taking all the cross streets off the highway. Access between 18/151 from 12/14 to the west would go through the SPUI.
http://www.dot.wisconsin.gov/projects/d1/verona/docs/map-altstage3.pdf <-- this PDF shows the planned
How can I begin to explain this mess of ramps near Newark Liberty Airport?:
http://maps.google.com/maps?hl=en&ie=UTF8&ll=40.709206,-74.168401&spn=0.01324,0.056133&t=k&z=15
Seems like every big city has an interchange or two that defy description, a point people often make emphatically with failed attempts to describe them. But just in terms of pure strangeness, I dunno. It's an interesting question.
The first interchange that came to mind was the one in Louisville, KY near the river. It's old and has lots of left exits and weaving issues. I haven't been on it in many years, but I remember it fairly well because a couple decades ago I got caught in a lengthy traffic jam at that interchange, and while I waited I looked around trying to take it all in. I couldn't.
Looking at it on this map fits with my memory, but that isn't saying much because like I said, I couldn't figure out how the junction worked even as I had time to sit and study it. So I suppose their might have been some upgrading done in the time since I was there, but it doesn't look like it's been entirely rebuilt:
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=louisville,+ky&aq=&sll=37.0625,-95.677068&sspn=25.288195,47.900391&ie=UTF8&hq=&hnear=Louisville,+Jefferson,+Kentucky&ll=38.259177,-85.741167&spn=0.012199,0.023389&z=15
For a small-town example, I offer the Vicksburg Twins, as I call them. Two back-to-back half-cloverleafs with left-exiting "flyover" ramps. Although weaving can become an issue on the non-freeway at each junction (it's rare), there are no cross-traffic left turns at any point, but there are movements you can't make. If you should need to, you'd use the opposite interchange:
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=vicksburg,+ms&aq=&sll=38.259143,-85.739815&sspn=0.006099,0.011694&ie=UTF8&hq=&hnear=Vicksburg,+Warren,+Mississippi&ll=32.345887,-90.838394&spn=0.02625,0.046778&z=14
How about the single ramp interchange from I-95 NB to US 301 NB in EMporia, VA. True that was left behind when I-95 used to end there back in the early 80's as it was a wye interchange with an entrance to I-95 SB from US 301 SB. Actually US 301 SB exited itself to the left and both lanes of I-95 NB went under the current underpass on the ramp that is probably why VDOT left the ramp behind.
The I-405 and Sunset Boulevard Interchange in LA. It has Sepulveda Boulevard pass through it, with no connection to either except for a ramp from WB Sunset to Sepulveda.
http://maps.google.com/?ie=UTF8&ll=29.968589,-90.108812&spn=0.004164,0.014613&t=k&z=17
I don't know if it necessarily qualifies as "strange" so much as "unusual" in that it's unusual in a good way: I-395 and VA-7 (King Street) in Arlington, Virginia, is a modified cloverleaf design where traffic leaving either road in either direction takes a single ramp that then splits–the usual weave area on a cloverleaf with the merge lane connecting the loop-around ramps is eliminated because there are only two loop-around ramps.
http://maps.google.com/?ie=UTF8&ll=38.835111,-77.097577&spn=0.006193,0.016512&t=k&z=17
But of the truly strange ones, I'd put the one outside Short Hills Mall in New Jersey either at or near the top of the list simply because of its stupid design. I've long that New Jersey's basic theory for interchange design is to sketch out the essential part, then just throw in as many random ramps as are needed to complete the full set of movements. Problem at Short Hills is that they didn't do that. If you look at the linked map below, NJ-24 enters from the top center. Route 124 leaves to the left center. Try coming down from the top of the map on NJ-24 and then using the interchange to go west on 124. This is what you have to do: (1) Take the exit on the right. (2) Pass under the overpass and immediately take the loop-around ramp on the right. (3) Cross over the overpass you just went under and then take the next exit on the right for the loop-around ramp that runs between the golf course and that building. (4) Make a right at the bottom of the ramp onto JFK Parkway heading back towards the mall. (5) Pass under the two overpasses (the first of which you've already passed under once and crossed once) and then take the loop-around ramp on the right just to the north of NJ-24; this ramp carries you back towards NJ-24 going back in the direction you started from. (6) Then take the second loop-around ramp on the right to access the ramp to westbound Route 124.
It seems like it would have been very easy for them simply to have stuck in a small ramp at the western corner of this interchange to allow for this maneuver, but they didn't (I do not know whether the presence of that water nearby might have been an issue).
http://maps.google.com/?ie=UTF8&ll=40.739258,-74.368579&spn=0.006024,0.016512&t=k&z=17
I-76/I-376 (east)/US-22 in Monroeville, PA
http://maps.google.com/?ie=UTF8&t=k&ll=40.438259,-79.756215&spn=0.006647,0.028067&z=16
Quote from: 1995hoo on May 02, 2011, 12:01:44 PM
But of the truly strange ones, I'd put the one outside Short Hills Mall in New Jersey either at or near the top of the list simply because of its stupid design. I've long that New Jersey's basic theory for interchange design is to sketch out the essential part, then just throw in as many random ramps as are needed to complete the full set of movements. Problem at Short Hills is that they didn't do that. If you look at the linked map below, NJ-24 enters from the top center. Route 124 leaves to the left center. Try coming down from the top of the map on NJ-24 and then using the interchange to go west on 124. This is what you have to do: (1) Take the exit on the right. (2) Pass under the overpass and immediately take the loop-around ramp on the right. (3) Cross over the overpass you just went under and then take the next exit on the right for the loop-around ramp that runs between the golf course and that building. (4) Make a right at the bottom of the ramp onto JFK Parkway heading back towards the mall. (5) Pass under the two overpasses (the first of which you've already passed under once and crossed once) and then take the loop-around ramp on the right just to the north of NJ-24; this ramp carries you back towards NJ-24 going back in the direction you started from. (6) Then take the second loop-around ramp on the right to access the ramp to westbound Route 124.
It seems like it would have been very easy for them simply to have stuck in a small ramp at the western corner of this interchange to allow for this maneuver, but they didn't (I do not know whether the presence of that water nearby might have been an issue).
http://maps.google.com/?ie=UTF8&ll=40.739258,-74.368579&spn=0.006024,0.016512&t=k&z=17
This was omission by design. Interchange 5, with the ghost ramps to the west, was intended to serve the missing movement you speak of by having traffic use 5A and head south to NJ 124 in Chatham. But now with 5 miles between exits, it could make more sense (given enough movements) to go to Chatham via 24 E-124W than to use the 510W exit and take Park Ave. to 124 E. (Though Park has been fairly well upgraded to try to help, you get stuck in Madison.)
Quote from: ftballfan on May 02, 2011, 02:19:08 PM
I-76/I-376 (east)/US-22 in Monroeville, PA
http://maps.google.com/?ie=UTF8&t=k&ll=40.438259,-79.756215&spn=0.006647,0.028067&z=16
The main reason for this design was to reuse most of the existing Turnpike interchange as possible. It looks like only the ramp from Bus US 22 East to the Turnpike was altered from the original design. (Of course, you Pittsburgh resident feel free to correct me if I'm wrong.)
Quote from: ftballfan on May 02, 2011, 02:19:08 PM
I-76/I-376 (east)/US-22 in Monroeville, PA
Quote from: mightyace on May 02, 2011, 09:15:13 PM
Quote from: ftballfan on May 02, 2011, 02:19:08 PM
I-76/I-376 (east)/US-22 in Monroeville, PA
http://maps.google.com/?ie=UTF8&t=k&ll=40.438259,-79.756215&spn=0.006647,0.028067&z=16
The main reason for this design was to reuse most of the existing Turnpike interchange as possible. It looks like only the ramp from Bus US 22 East to the Turnpike was altered from the original design. (Of course, you Pittsburgh resident feel free to correct me if I'm wrong.)
Sounds about right.
As I said in this tread, or a similar one, most all of the interchanges on the original I-376 Parkway East segment (and, hell, even out the Parkway West to I-79) are pretty strange when you look at them.
Quote from: Mr_Northside on May 03, 2011, 04:46:13 PM
Sounds about right.
As I said in this tread, or a similar one, most all of the interchanges on the original I-376 Parkway East segment (and, hell, even out the Parkway West to I-79) are pretty strange when you look at them.
From looking at Google Maps, most of the interchanges along all of I-376 (even all the way to I-80) are strange. There are a few normal diamonds thrown in northwest of the airport and a cloverleaf at I-80. The western I-76/I-376 junction is also strange. It's a modified double trumpet to allow for access to PA-351. It also exits off itself heading SB near New Castle.
Quote from: mightyace on May 02, 2011, 09:15:13 PM
Quote from: ftballfan on May 02, 2011, 02:19:08 PM
I-76/I-376 (east)/US-22 in Monroeville, PA
http://maps.google.com/?ie=UTF8&t=k&ll=40.438259,-79.756215&spn=0.006647,0.028067&z=16
The main reason for this design was to reuse most of the existing Turnpike interchange as possible. It looks like only the ramp from Bus US 22 East to the Turnpike was altered from the original design. (Of course, you Pittsburgh resident feel free to correct me if I'm wrong.)
That is the exact reason. The original trumpet with William Penn Highway before the Monroeville bypass was built can be seen, and yes, the original ramp from then eastbound US 22 was reconfigured to allow space for the connection of then I-70.
Quote from: ftballfan on May 04, 2011, 03:59:51 PMFrom looking at Google Maps, most of the interchanges along all of I-376 (even all the way to I-80) are strange. There are a few normal diamonds thrown in northwest of the airport and a cloverleaf at I-80. The western I-76/I-376 junction is also strange. It's a modified double trumpet to allow for access to PA-351. It also exits off itself heading SB near New Castle.
The interchange at US 224 was recently reconfigured and eastbound I-376 was widened to two lanes at the southern US 422 interchange. Diamonds are the standard interchanges for PTC extensions: one half is off/on for free and the other half you pay tolls, which explains the numerous ones through Beaver and Lawrence Counties.
The 76/376 (New Castle Interchange) also had a toll plaza until 2003, whose building can still be seen, between 76 and then Turnpike 60.
^^^
Having a toll plaza between two toll roads seems funny in one way. But, back then, that part of the mainline was still ticket system and PA 60 (now I-376) was and is a barrier system.
There's also local access at the I-376 end of the interchange.
It may seem strange on paper, but considering it was a connection between a barrier system toll road and a ticket system toll road, it isn't that strange. For those leaving 76, they had to surrender their ticket and those coming from 60 had to pick one up.
How about the Woodbridge Tangle in New Jersey? It was once simple, but adding the NJ 440 Freeway changed it to being most complicated. If you look at old arieal photographs you will see that US 9 was originally in the median of the GSP. Now its reveresed! US 9 is the service road for the Parkway. Only the New Brunswick Avenue ramps to and from US 9 are the same except pre-tangle days they were Exit 127 of the Parkway. Back then you could go directly between those two roads and now from New Brunswick Avenue to the GSP you have to travel a distance on US 9 either way to get on the roadway you once had direct on ramps to.
There is another in Bridgewater, NJ between US 22 and US 202 & 206. There is no EB to SB movement anymore. Originally there was an exit from US 22 EB to US 202-206 SB ONLY! When the interchange was re-configured back in 87, the project manager eliminated that ramp for a cloverleaf so that SB to EB can move due to the re-alignment of the NB US 202-206 carrigeway. Originally there was a u-turn ramp so that EB could go NB and SB could go EB. Also, a EB to NB ramp as well as connection to Mountain Avenue from US 22 EB was added.
Bottom line is one movement that once was is now no longer.
http://maps.google.com/maps?q=08060&oe=utf-8&client=firefox-a&ie=UTF8&hq=&hnear=Mt+Holly,+New+Jersey+08060&gl=us&ll=40.260534,-74.844167&spn=0.004077,0.010504&t=h&z=17
I think this interchange is strange, and the new design with roundabouts will keep it that way. I-95 north of trenton with NJ 29
Quote from: SteveG1988 on May 22, 2011, 10:51:20 PM
http://maps.google.com/maps?q=08060&oe=utf-8&client=firefox-a&ie=UTF8&hq=&hnear=Mt+Holly,+New+Jersey+08060&gl=us&ll=40.260534,-74.844167&spn=0.004077,0.010504&t=h&z=17
I think this interchange is strange, and the new design with roundabouts will keep it that way. I-95 north of trenton with NJ 29
I pronounced that one the "thread winner" in a channelization thread in MTR back in the day
http://maps.google.com/maps?q=08060&oe=utf-8&client=firefox-a&ie=UTF8&hq=&hnear=Mt+Holly,+New+Jersey+08060&gl=us&t=h&ll=39.872331,-75.099578&spn=0.016402,0.042014&z=15
Runner up. 35mph interstate where you have to practicaly exit the mainline to stay on it
The current Decarie interchange in Montreal is a real pain for some users, left exits for A-40 west to A-15 south and A-15 north to A-40 west as well as commuters from the north service road had to take a detour to continue their route
http://www.mtq.gouv.qc.ca/portal/page/portal/Librairie/Publications/fr/regions/montreal/DIM_Decarie_exist.pdf
The MTQ will reconfigure the northern part of this interchange as phase 1 of a bigger plan for the reconfiguration of the interchange http://www.mtq.gouv.qc.ca/portal/page/portal/Librairie/Publications/fr/regions/montreal/DIM_Decarie_projet%20.pdf
I have seen one recently in Metarie, LA where there is now a flyover from NB Causeway Blvd to I-10 WB that becomes the original cloverleaf ramp that was there making you do a complete figure 8 to make that movement. I have never seen anything like it, but I must admit it is original. Most of all it does what it is supposed to do and prevent weaving between I-10 EB to NB Causeway and NB Causeway to I-10 WB.
Quote from: ftballfan on April 06, 2011, 03:01:23 PM
From Georgia: I-75/I-85/I-20 in downtown Atlanta: http://maps.google.com/maps?hl=en&ie=UTF8&ll=33.744468,-84.389999&spn=0.007262,0.028067&t=k&z=16
What's so strange about it? Looks like a decent (although very congested) urban interchange...considering it's in downtown Atlanta.
Quote from: brownpelican on June 13, 2011, 02:57:04 PM
What's so strange about it? Looks like a decent (although very congested) urban interchange...considering it's in downtown Atlanta.
not all that strange, but there is a lot of complexity with the extra ramps to and from the surface. Hopefully it is signed well, as it could be confusing. I have driven it several times before, but just stayed on the freeway (20 EB once, 75 SB once) and from that perspective it wasn't bad.
Quote from: roadman65 on June 13, 2011, 12:13:01 AM
I have seen one recently in Metarie, LA where there is now a flyover from NB Causeway Blvd to I-10 WB that becomes the original cloverleaf ramp that was there making you do a complete figure 8 to make that movement. I have never seen anything like it, but I must admit it is original. Most of all it does what it is supposed to do and prevent weaving between I-10 EB to NB Causeway and NB Causeway to I-10 WB.
Before the project began, those going from I-10 West to North Causeway had to share an auxillary lane with those going from North Causeway to Veterans Blvd. The auxillary lane was very short and cause HUGE backups on I-10 West and North Causeway...directly affecting those going from North Causeway to I-10 West. They chose the design because of the limited right of way available. Here's how the finished product is supposed to work (you may have to reload a few times):
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fblog.nola.com%2Fnews_impact%2F2009%2F04%2FCAUSEWAY040509.swf&hash=72c9779bbe48237b41a7f63435c4061a2442e85f)
http://blog.nola.com/news_impact/2009/04/CAUSEWAY040509.swf (http://blog.nola.com/news_impact/2009/04/CAUSEWAY040509.swf)
Quote from: brownpelican on June 13, 2011, 03:13:34 PM
Quote from: roadman65 on June 13, 2011, 12:13:01 AM
I have seen one recently in Metarie, LA where there is now a flyover from NB Causeway Blvd to I-10 WB that becomes the original cloverleaf ramp that was there making you do a complete figure 8 to make that movement. I have never seen anything like it, but I must admit it is original. Most of all it does what it is supposed to do and prevent weaving between I-10 EB to NB Causeway and NB Causeway to I-10 WB.
Before the project began, those going from I-10 West to North Causeway had to share an auxillary lane with those going from North Causeway to Veterans Blvd. The auxillary lane was very short and cause HUGE backups on I-10 West and North Causeway...directly affecting those going from North Causeway to I-10 West. They chose the design because of the limited right of way available. Here's how the finished product is supposed to work (you may have to reload a few times):
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fblog.nola.com%2Fnews_impact%2F2009%2F04%2FCAUSEWAY040509.swf&hash=72c9779bbe48237b41a7f63435c4061a2442e85f)
http://blog.nola.com/news_impact/2009/04/CAUSEWAY040509.swf (http://blog.nola.com/news_impact/2009/04/CAUSEWAY040509.swf)
That look very...confusing.
Quote from: WolfGuy100 on June 13, 2011, 04:40:59 PM
Quote from: brownpelican on June 13, 2011, 03:13:34 PM
Quote from: roadman65 on June 13, 2011, 12:13:01 AM
I have seen one recently in Metarie, LA where there is now a flyover from NB Causeway Blvd to I-10 WB that becomes the original cloverleaf ramp that was there making you do a complete figure 8 to make that movement. I have never seen anything like it, but I must admit it is original. Most of all it does what it is supposed to do and prevent weaving between I-10 EB to NB Causeway and NB Causeway to I-10 WB.
Before the project began, those going from I-10 West to North Causeway had to share an auxillary lane with those going from North Causeway to Veterans Blvd. The auxillary lane was very short and cause HUGE backups on I-10 West and North Causeway...directly affecting those going from North Causeway to I-10 West. They chose the design because of the limited right of way available. Here's how the finished product is supposed to work (you may have to reload a few times):
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fblog.nola.com%2Fnews_impact%2F2009%2F04%2FCAUSEWAY040509.swf&hash=72c9779bbe48237b41a7f63435c4061a2442e85f)
http://blog.nola.com/news_impact/2009/04/CAUSEWAY040509.swf (http://blog.nola.com/news_impact/2009/04/CAUSEWAY040509.swf)
That look very...confusing.
I think the reason it looks confusing is that it's not a three-dimensional graphic. I looked at Google Maps' satellite view to confirm what I thought I was seeing and it verified that it's a situation where you have two mainlines (I-10 and Causeway Boulevard) that each have service roads (or frontage roads) as well. What brownpelican is saying is that under the original design, traffic exiting westbound I-10 onto the northbound mainline of Causeway had to cross over with the traffic going from northbound Causeway to Veterans Boulevard, which is accessed only from the service road since Causeway passes over Veterans via an overpass.
The new design will eliminate the crossing over by putting the mainline/service road split on Causeway south of where it was and by providing a flyover ramp so that traffic from westbound I-10 will merge into the Causeway mainline after Veterans-bound traffic has already exited.
The cloverleaf part of it looks similar to. though not quite the same as, the I-395/King Street interchange in Virginia that I linked at the top of Page 3 of this thread. You exit, then you pick which way you want to go. It reduces some of the weaving and merging.
On the whole it looks like a fairly sensible idea. Here in Northern Virginia we had a similar merging problem on I-95 in Springfield just south of the Beltway (the heart of the notorious Springfield Interchange), where prior to the reconstruction all the thru traffic on I-95 (and from the western part of the Beltway bound for I-95) had to choke down to two lanes and shove left just as traffic coming from DC on I-395 bound for Springfield had to shove right. They rebuilt the interchange to separate all the movements and it's worked wonders compared to how it used to be. The one in Metairie seems like one with a similar intent on a much smaller scale. I hope it works as well as ours did and costs them less!
Edited to add: If you look at the satellite view at the following zoom level you can see it how it was. Note the area just to the right of the placemarker. That's the problematic merge area brownpelican mentions.
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=I-10+and+Causeway+Blvd,+Metairie,+LA&aq=&sll=37.0625,-95.677068&sspn=51.089971,135.263672&ie=UTF8&hq=&hnear=N+Causeway+Blvd+%26+North+Interstate+10+Service+Rd+W,+Metairie,+Jefferson,+Louisiana+70002&ll=30.001005,-90.154109&spn=0.004868,0.008256&t=k&z=18
After you look at that, if you zoom the image out one click, or one turn of your mouse's scrolly ball, you'll see the reconstruction in progress. Looks like a pretty good job of doing it within the existing footprint.
Whitman Street Interchange in Rockford, Illinois
....it's a strange configuration of state highways and city streets in the heart of the city, without a freeway or expressway :crazy:
http://maps.google.com/maps?q=Longwood+%26+Rural&ie=UTF8&hl=en&hq=&hnear=Rural+St+%26+N+Longwood+St,+Rockford,+Winnebago,+Illinois+61107&ll=42.274165,-89.080861&spn=0.008748,0.021973&z=16
There has been talk of revamping this entire interchange and reconnecting the neighborhoods it split apart; the pavement is literally crumbling and I would not recommend driving in this area, you are 99% guaranteed to hit couple of potholes....
^^^
The eastern side of the PA 61 bridge in Sunbury, PA has something similar going on. Though, this one seems more compact and less disrupting of the local neighborhood.
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Sunbury,+pa&aq=&sll=42.275245,-89.081161&sspn=0.007129,0.019076&ie=UTF8&hq=&hnear=Sunbury,+Northumberland,+Pennsylvania&ll=40.851865,-76.801826&spn=0.005421,0.009645&t=h&z=17
Back to yours, it looks like 251 from there north is a semi-freeway from there north with a few exits. Was this built as a compromise to a proposed expressway that got killed?
Though, I would agree that the exit for the eastern approach to this bridge is a bit overdone.
Fort Hayes interchange (I-71 / I-670) in Columbus:
http://maps.google.com/?ie=UTF8&hq=&hnear=Columbus,+Franklin,+Ohio&ll=39.975311,-82.98641&spn=0.01151,0.021865&t=k&z=16 (http://maps.google.com/?ie=UTF8&hq=&hnear=Columbus,+Franklin,+Ohio&ll=39.975311,-82.98641&spn=0.01151,0.021865&t=k&z=16)
This is actually a sort of Version 2 of this interchange, which explains the extreme bifurcation that puts a high school in the median of I-670.
Work on Version 3 starts this summer, reconfiguring EB I-670 and both directions of I-71 as part of the 70/71 project.
The Golden Glades Interchange (http://maps.google.com/maps?ll=25.9265444,-80.2102589&z=15), northwest of Miami, Florida always looked like a battle between a giant squid and an enormous octopus:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Flh4.google.ca%2Fabramsv%2FR9WVh6tLexI%2FAAAAAAAALOY%2FtZWRBI-iZl8%2Fs640%2Fsdfgdfgrtytyt.jpg&hash=9e168cee59c3369df6e07d40a06a012083ac0eb5)
From the Florida Photographic Archives (mid-1960s?).
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.wikimapia.org%2Fp%2F00%2F01%2F36%2F12%2F62_big.jpg&hash=166aabca7037e18f6b848e01c1e038411e51e9a4)
Actually, before I-95, it was an almost-cloverleaf between SR 9 and the Turnpike, with the Turnpike roadway crossed at-grade by 826 west-441 north and 826 east-441 south (the southeast-side cloverleaf ramps intersected this roadway rather than the Turnpike connection). I haven't been able to find any top-down aerials (http://www.dot.state.fl.us/surveyingandmapping/apac.shtm has nothing from the right time period), and I can't remember what map I saw it on. But here are a few aerials from said archives:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Ffpc.dos.state.fl.us%2FDOT%2Fdot0440.jpg&hash=bc196bbdffa6b32455195e006c2a410c8a6548da)
looking northeast along SR 9; note remnants of the former at-grade between SR 9 and US 441 in the foreground
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Ffpc.dos.state.fl.us%2Freference%2Frc17269.jpg&hash=cdc6a7aa485279444ac66804596f8f4082ff6d35)
looking southwest along SR 9
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Ffpc.dos.state.fl.us%2Freference%2Frc17270a.jpg&hash=e27de7e57a3a5b52ba1e50ef268dae26661bf40e)
looking south
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Ffpc.dos.state.fl.us%2FDOT%2Fdot0438.jpg&hash=fe2b9ad6fddc7aba6e38b5aa180247637905442d)
looking north before the Turnpike existed (it was simply tied into the existing interchange)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Ffpc.dos.state.fl.us%2Freference%2Frc13434.jpg&hash=9fb57f3fbe1fe66c270982cddff9a6e58a6e0d3f)
looking northwest where the Turnpike began; US 441 north is to the right and SR 826 west to the left
Presumably the two bridges on the Turnpike connection over the railroad and SR 9 were reused in the new configuration, but the one taking a ramp over US 441 south was not.
I like the old speed limit sign in that last picture. When was it taken?
Here in Northern Virginia we still have a couple of "Do Not Enter" signs like the one on the far left using white text on a red background. Some of them are very new signs, too. VDOT uses them in the Shirley Highway express lanes where there's a ramp that accesses the opposite-direction mainline carriageway.
Quote from: 1995hoo on June 15, 2011, 07:57:00 AM
I like the old speed limit sign in that last picture. When was it taken?
1957. I'm not sure how to link to the details, but search http://www.floridamemory.com/photographiccollection/ for Golden Glades and it's #6.
OT: Linking to exact picture information on the Florida Memory Photographic site isn't possible; you can hotlink the exact image, but not the info page, due to the way the query is performed.
Great site, everything is also effectively Creative Commons-licensed due to Florida's Sunshine Laws on by government employees or works for governmental purposes.
I'd like to nominate the I-84/I-205 interchange east of Portland, OR. This interchange was made complicated by the fact the two expressways parallel each other for about one mile which creates crossovers/unders from one to the other over that mile.
Similar to the I-355/I-88 interchange just east of Lisle, IL...
Quote from: Stratuscaster on July 03, 2011, 07:24:24 PM
Similar to the I-355/I-88 interchange just east of Lisle, IL...
And I-290/I-294 near Elmhurst.
They have about 4 of them in New Orleans :happy:
Westbank Expy(US-90 BUS(I-910))/Terry Pkwy/Gen De Gaulle Dr:
http://bit.ly/kYh94N (http://bit.ly/kYh94N)
Pontchartrain Expy(US-90 BUS(I-910))/Tchoupitoulas St
http://bit.ly/mN0aEz (http://bit.ly/mN0aEz)
US-90/US-90 BUS(I-910)/I-10/Poydras Ave/Superdome
http://bit.ly/jW4R6P (http://bit.ly/jW4R6P)
Pontchartrain Expy(I-10)/Carrollton Ave/Tulane Ave-Airline Dr(US-61)
http://bit.ly/kd4KwO (http://bit.ly/kd4KwO)
There are plenty in Chicagoland (most of which have already been said) but ones that haven't been said include the I-290/US-20/York St interchange in Elmhurst, the I-55/I-294/Wolf Rd/Joliet Rd interchange, the I-80-94/Kennedy Ave interchange in Highland, but the winner for Chicagoland has to be the I-90/I-65/US-12-20/15th Ave interchange in Gary.
Strangest "freeway" and "non freeway" interchanges in the world would have to go to saavy Cuba! You can live inside the cloverleaf and gore areas! Any of the freeways leaving Havana are just fun to look at on Google.
Not sure if this counts but US130 & NJ168 Mt. Ephraim
Might have to insert labels to see how the interchange works. I used to drive through it all the time when I lived in NJ. Definitely wins in my book for unusual/interesting.
I-4 and South Street in Downtown Orlando, FL is now strange. The WB only ramp from I-4 WB to WB South Street was closed when the new Amway Center was being constructed as South Street was closed to build both the arena and parking garage between Garland and Division Avenues. The ramp is in between the two streets and had to be closed then.
Now the Amway Center is open and so is South Street, however the WB Ramp from I-4 was never re-opened when construction finished. FDOT took down the signs for Exit 83 and South Street and placed a jersey barrier across the ramp months after the Amway Center opened. The funny thing is the fact that the entrance to the Geico Garage (when the spectators park for all Amway events) is on South Street just west of I-4 where that ramp would help get motorists in to the parking facility with total ease! Now you have to exit onto Anderson Street then turn right to Division Avenue, Right on Division to South Street, then right onto South into the Garage.
Years ago, the South Street ramp was useless, and signed poorly by FDOT due to the fact it had no real purpose to any motorists. Now that the ramp finally serves a purpose, it is closed. Go figure!
Quote from: Lightning Strike on October 09, 2011, 02:08:06 PM
Not sure if this counts but US130 & NJ168 Mt. Ephraim
Might have to insert labels to see how the interchange works. I used to drive through it all the time when I lived in NJ. Definitely wins in my book for unusual/interesting.
Well, it's not an interchange, but definitely an unusual intersection. It looks like it has elements of a continuous flow intersection.
This interchange has an extra long ramp
https://www.google.com/maps/@39.0405591,-84.4667161,17z
This interchange is extremely strange with an abnormal configuration
https://www.google.com/maps/@39.1156898,-84.4995141,18z
This one in Paris, TX at US 271 and TX Loop 286
https://www.google.com/lochp?ll=33.647332,-95.502305&spn=0.008574,0.019248&t=k&z=16
Quote from: iBallasticwolf2 on May 14, 2015, 08:56:20 PM
This interchange has an extra long ramp
https://www.google.com/maps/@39.0405591,-84.4667161,17z
This interchange is extremely strange with an abnormal configuration
https://www.google.com/maps/@39.1156898,-84.4995141,18z
The Cincinnati/Northern Kentucky area is filled with strange interchanges, e.g. Ronald Reagan (Cross County) and I-75, Reed Hartman and Reagan, Turfway and I-75 (northbound, a diamond; southbound, exit and entrance ramps acting like a trumpet), your second example of Reading Road northbound in the median of I-71, and, using your first example, the long exit ramp from I-275 east to Three Mile Road--also known as the Northern Kentucky University exit (the back way).
Not to mention all of the odd interchanges on the IDL in Tulsa. My favorite is the one on the northeastern corner.
Quote from: amroad17 on May 16, 2015, 10:26:28 PM
Quote from: iBallasticwolf2 on May 14, 2015, 08:56:20 PM
This interchange has an extra long ramp
https://www.google.com/maps/@39.0405591,-84.4667161,17z
This interchange is extremely strange with an abnormal configuration
https://www.google.com/maps/@39.1156898,-84.4995141,18z
The Cincinnati/Northern Kentucky area is filled with strange interchanges, e.g. Ronald Reagan (Cross County) and I-75, Reed Hartman and Reagan, Turfway and I-75 (northbound, a diamond; southbound, exit and entrance ramps acting like a trumpet), your second example of Reading Road northbound in the median of I-71, and, using your first example, the long exit ramp from I-275 east to Three Mile Road--also known as the Northern Kentucky University exit (the back way).
Not to mention the interchange with I-75 and I-71 right after the Brent Spence bridge on the Ohio side, as well as I-71 and OH-562
Quote from: noelbotevera on May 22, 2015, 04:01:31 PM
I-78 at Exit 29 and I-287 at Exit 21A-B in Bedminister, New Jersey. On I-78, traffic is actually dumped onto the original I-287, not I-287 directly (outer roadway). This happens for quite a while until half a mile from exit 14. Exit 14 is a left exit, so you have to do a tight weave onto US 22 or US 202/206. This interchange is near another incomplete interchange too, the US 22 and US 202/206 interchange to the west, and exits 17 and 14 to the south. So basically, I-287 is scrunched and tight weaves happen for the next 7 miles along I-287. I-287 when it reaches exit 21 however, gets a direct connection to I-78 from the left. It's awful when having to take that exit. I-78 pretty much loses and takes quite a while to merge into the main carriageway of I-287. It's gonna be worse further south. :no:
This is why I heavily prefer to take US 22 off of I-78 when I'm coming from the western portions of the state - so I don't have to deal with that mess. The signals on 22 are timed decently enough too, though the frequency of patrol cars lurking means I can't always go above the speed limit.
I've always loved the Interchange between I-5, I-405, US 26, OR-99W, and OR-43. It is like a gigantic round about connected via surface streets to other roadways, and partially screwed up due to removal of Harbor Drive.
https://www.google.com/maps/place/Portland,+OR/@45.4999354,-122.6724839,731m/data=!3m1!1e3!4m2!3m1!1s0x54950b0b7da97427:0x1c36b9e6f6d18591!6m1!1e1
Quote from: noelbotevera on May 22, 2015, 04:01:31 PM
I-78 at Exit 29 and I-287 at Exit 21A-B in Bedminister, New Jersey. On I-78, traffic is actually dumped onto the original I-287, not I-287 directly (outer roadway).
Eh? I thought all four roadways were built simultaneously (to avoid weaving between the 78-287 and 78-202 movements).
Quote from: TEG24601 on May 22, 2015, 04:31:13 PM
I've always loved the Interchange between I-5, I-405, US 26, OR-99W, and OR-43. It is like a gigantic round about connected via surface streets to other roadways, and partially screwed up due to removal of Harbor Drive.
There's also the Paper Clip interchange between I-5 and OR-99E:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2F4omxRb7.png&hash=d6f5b9bef8501d2ba786d7ee42c4ea5426a5a82c)
Quote from: NE2 on May 22, 2015, 04:46:52 PM
Quote from: noelbotevera on May 22, 2015, 04:01:31 PM
I-78 at Exit 29 and I-287 at Exit 21A-B in Bedminister, New Jersey. On I-78, traffic is actually dumped onto the original I-287, not I-287 directly (outer roadway).
Eh? I thought all four roadways were built simultaneously (to avoid weaving between the 78-287 and 78-202 movements).
Oh. I thought the outside roadway was the original I-287 cause there's no pavement markings. If there is no or fading white pavement markings I usually think it's an old alignment. Stupid me :ded:
There is the one interchange near San Antonio where I-35 and I-410 meet at the northeast end of the two route overlap. I-410 through traffic not only gets substandard ramps but make basically a hook instead of utilizing the land in the southwest quadrant to build much better (and direct) ramps or better through alignment.
Slightly off-topic, but I doubt there is a much cooler looking interchange than the I-787 / US 20 meeting in Albany, NY.
Quote from: rbt48 on May 29, 2015, 11:16:42 PM
Slightly off-topic, but I doubt there is a much cooler looking interchange than the I-787 / US 20 meeting in Albany, NY.
You mean this one (http://www.empirestateroads.com/week/week7.html)? ;-)
Quote from: jakeroot on May 22, 2015, 04:55:54 PM
Quote from: TEG24601 on May 22, 2015, 04:31:13 PM
I've always loved the Interchange between I-5, I-405, US 26, OR-99W, and OR-43. It is like a gigantic round about connected via surface streets to other roadways, and partially screwed up due to removal of Harbor Drive.
There's also the Paper Clip interchange between I-5 and OR-99E:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2F4omxRb7.png&hash=d6f5b9bef8501d2ba786d7ee42c4ea5426a5a82c)
That's pretty nifty! Check this out if you haven't seen it yet: http://www.kurumi.com/roads/interchanges/oddities.html
One interesting thing, as he says on his page, is that making a through movement from an off-ramp results in a "u-turn" on the mainline. To rejoin the mainline in the same direction you could make a u-turn. I'd like to see a sign describing that!
I guess I'm a bit confused why he calls this geometry "spupclo". If I'm looking at this right it's the same (operationally) as what he calls a "paperclip". To me anything with "single point" in the name should have the ramps aligned in a normal diamond pattern. Isn't he a user here? Maybe he'll explain this... my brain hurts! :spin:
Two things occurred to me long after I wrote the "Strange interchanges" page:
* some of those interchanges really exist
* paperclips and spupclos are more similar than different
All ramps intersect at a single point, but loop ramps are used to avoid the large left turn geometry that a SPUI needs. If we should be distinguishing paperclips and spupclos (we'll leave that to the PhDs in civil engineering :-) then we could do so based on either:
* whether the surface street crosses the freeway or stays parallel
* whether an inner loop exit ramp becomes an outer loop entrance ramp (spupclo example) or stays inner (as in I-5/OR 99E)
Though old, it fits the topic as it is a strange interchange.
https://goo.gl/maps/bMrTYEuGoKs1YK1z9
The I-91 and VT 9 exchange in Brattleboro is got unusual ramps for a folded diamond. They are way too long for any interchanges IMO.
Quote from: roadman65 on September 08, 2021, 07:54:26 PM
Though old, it fits the topic as it is a strange interchange.
https://goo.gl/maps/bMrTYEuGoKs1YK1z9
The I-91 and VT 9 exchange in Brattleboro is got unusual ramps for a folded diamond. They are way too long for any interchanges IMO.
Hooo boy, I immediately thought of something dirty when I saw that, lol.
Quote from: roadman65 on September 08, 2021, 07:54:26 PM
Though old, it fits the topic as it is a strange interchange.
https://goo.gl/maps/bMrTYEuGoKs1YK1z9
The I-91 and VT 9 exchange in Brattleboro is got unusual ramps for a folded diamond. They are way too long for any interchanges IMO.
Looking at the satellite view, that design might have been the only one to maintain all movements and to not destroy whole streets worth of houses on Brattle St. and Allerton Ave.
There aren't too many alternatives for northbound I-91 traffic to exit onto VT 2. Just think of them as glorified frontage roads with a RIRO exit on either side.
Quote from: ftballfan on April 14, 2011, 02:02:01 PM
Quote from: froggie on April 14, 2011, 12:27:09 PM
QuoteI-95 and I-695 north of Baltimore used to do that when they met, but now it's a conventional stack interchange.
Not completely true. The I-695 carriageways still cross each other through the interchange.
US-131 does the same thing at I-196. Also, the carriageways for I-196 are at different levels, one going over US-131 and the other going under.
I refer to that portion of US-131 as The Corkscrew.
Quote from: dlsterner on September 09, 2021, 08:13:49 PM
Quote from: roadman65 on September 08, 2021, 07:54:26 PM
Though old, it fits the topic as it is a strange interchange.
https://goo.gl/maps/bMrTYEuGoKs1YK1z9
The I-91 and VT 9 exchange in Brattleboro is got unusual ramps for a folded diamond. They are way too long for any interchanges IMO.
Looking at the satellite view, that design might have been the only one to maintain all movements and to not destroy whole streets worth of houses on Brattle St. and Allerton Ave.
There aren't too many alternatives for northbound I-91 traffic to exit onto VT 2. Just think of them as glorified frontage roads with a RIRO exit on either side.
My thoughts exactly. It makes me wonder how many other homes got razed to build the freeway in the first place.
Quote from: roadman65 on September 08, 2021, 07:54:26 PM
Though old, it fits the topic as it is a strange interchange.
https://goo.gl/maps/bMrTYEuGoKs1YK1z9
The I-91 and VT 9 exchange in Brattleboro is got unusual ramps for a folded diamond. They are way too long for any interchanges IMO.
Kansas has a similar one here, although the large interchange directly south of it is my nominee for strangest interchange:
https://goo.gl/maps/SpXQqb6WQ1o46Rek6
Presented without further comment:
(https://i.imgur.com/2vnjCmI.jpg)
US 45E, TN 22, and TN 431 near Martin, TN (https://www.google.com/maps/@36.3247032,-88.8048801,831m/data=!3m1!1e3). TN 22 has priority and two-lane ramps as it passes through the interchange. It's a TOTSO north/westbound but not south/eastbound, since the ramps carrying US 45E are on the right (and one lane). And there's a left lane exit only for the northbound exit to TN 431 as a way to killing off the unneeded second northbound lane.
The bridges are similar in design, but the one for TN 22 was built in 1985 (http://bridgereports.com/1515432), while the ones for US 45E are from 1994 (http://bridgereports.com/1515455), which pretty much explains the layout. That section of US 45E provides a marginally-useful second bypass of Martin, which was likely an afterthought.
Quote from: Occidental Tourist on September 10, 2021, 02:35:08 AM
Presented without further comment:
(https://i.imgur.com/2vnjCmI.jpg)
Oh COME ON NOW. lol. I almost think that must have been intentional.
Quote from: achilles765 on September 10, 2021, 11:54:48 AM
Oh COME ON NOW. lol. I almost think that must have been intentional.
https://www.youtube.com/watch?v=wzCwYJZfqik
(https://dsm01pap002files.storage.live.com/y4pAIYlR_5D8leqLhkHhBCBUhhkvOCve-1yCZHTeaUMXckI4QU2ssX3OwprmmcL9QIc6bdFX9_N06VJ_VwpC0jwAeotzTP1OCF0oZr5WAjbPKkGRZ7JzH4CrkONgCQDYSe9Vlni4sKOdq2eEUaL3U_JaRE_O9p1JVCRjtYvOPkkf0gJMhs2lL6tQd2A1rUA0IvA/Screenshot%202021-09-10%20162250.png?psid=1&width=561&height=500)
Exit 79 is a GOOD example of a weird interchange.
I95 in Benson NC.
In 1957, exit 79 had NO direct intersection with NC 50. Signs said TO NC 50 instead of NC 540.
However, on NB sides of Exit 79, exit 79 has NC 242 signs rather than TO NC 50.
This was rebuilt in 2005 to a folded diamond interchange, as well as replacing the old 1950s bridge (the bridge was in process of being replaced as seen in sat view)
Most of I-240 is odd, but especially between Exit 3/Patton Ave. and Exit 4 to the east in Asheville.
Quote from: roadman65 on September 09, 2021, 11:41:12 PM
Quote from: dlsterner on September 09, 2021, 08:13:49 PM
Quote from: roadman65 on September 08, 2021, 07:54:26 PM
Though old, it fits the topic as it is a strange interchange.
https://goo.gl/maps/bMrTYEuGoKs1YK1z9
The I-91 and VT 9 exchange in Brattleboro is got unusual ramps for a folded diamond. They are way too long for any interchanges IMO.
Looking at the satellite view, that design might have been the only one to maintain all movements and to not destroy whole streets worth of houses on Brattle St. and Allerton Ave.
There aren't too many alternatives for northbound I-91 traffic to exit onto VT 2. Just think of them as glorified frontage roads with a RIRO exit on either side.
My thoughts exactly. It makes me wonder how many other homes got razed to build the freeway in the first place.
When constructing 91 in that area, the entirety of Northern Ave. was eliminated. Northern Ave. was another short residential dead-end off VT 9, about halfway between Brattle and Allerton, or roughly where the 91 mainline now sits. To build a "normal" interchange, they would probably have had to take all three streets.
Looking at Street View, I can see hints of former grading for a simple half-diamond interchange at I-91 & VT-9. My guess is the current configuration is a result of upgrading that partial interchange to accommodate all movements, without needing to take more residences.
^ You're seeing things. Exit 2 (I-91/VT 9) was built in its present configuration from the get-go. Here is a photograph (https://glcp.uvm.edu/landscape_new/search/details.php?ls=41074&sequence=000&set_seq=5&imageSet=1634736378-617018fa57cbf&AddRel=) showing an aerial view of the interchange from 1962, a couple years after it opened
There are a lot of old, substandard grade separated intersections in South Carolina.
US-21 and SC-9
This one is pretty odd; it comes complete with a gas station! If you look closer, the ramps have road names too! Boundary Road used to be US-21 before the overpass was built.
https://www.google.com/maps/@34.7020978,-80.8945192,16z/data=!3m1!1e3?gl=us (https://www.google.com/maps/@34.7020978,-80.8945192,16z/data=!3m1!1e3?gl=us)
US-521/US-521BL/SC-9/SC-200
Strange layout due to SC-200 forking off just south of where the bypass was built:
https://www.google.com/maps/@34.7344457,-80.7761042,15z/data=!3m1!1e3?gl=us
(https://www.google.com/maps/@34.7344457,-80.7761042,15z/data=!3m1!1e3?gl=us)
US-17 at Harrelson Blvd in Myrtle Beach has an unusual underpass loop ramp pair.
https://www.google.com/maps/@33.7032302,-78.9313204,16z/data=!3m1!1e3?gl=us (https://www.google.com/maps/@33.7032302,-78.9313204,16z/data=!3m1!1e3?gl=us)
In North Carolina:
I-85 at US-321
Recently rebuilt with new underpass ramps using an old railroad underpass.
https://www.google.com/maps/@35.2837416,-81.1877174,16z/data=!3m1!1e3?gl=us (https://www.google.com/maps/@35.2837416,-81.1877174,16z/data=!3m1!1e3?gl=us)
I-85 at US-29/US-74 near Kings Mountain is an interesting weave interchange
https://www.google.com/maps/@35.2483202,-81.3032547,14z/data=!3m1!1e3?gl=us (https://www.google.com/maps/@35.2483202,-81.3032547,14z/data=!3m1!1e3?gl=us)
An odd set of weaving ramps on I-240:
https://www.google.com/maps/@35.5953033,-82.5295594,16z/data=!3m1!1e3?gl=us
(https://www.google.com/maps/@35.5953033,-82.5295594,16z/data=!3m1!1e3?gl=us)
I-485 at Prosperity Church Road is a diamond with three overpasses and six roundabouts:
https://www.google.com/maps/@35.367645,-80.7844703,15z/data=!3m1!1e3?gl=us (https://www.google.com/maps/@35.367645,-80.7844703,15z/data=!3m1!1e3?gl=us)
Of course, there's the infamous I-77/I-85 interchange:
https://www.google.com/maps/@35.2717497,-80.8458006,15z/data=!3m1!1e3?gl=us (https://www.google.com/maps/@35.2717497,-80.8458006,15z/data=!3m1!1e3?gl=us)
Quote from: froggie on October 20, 2021, 09:28:46 AM
^ You're seeing things. Exit 2 (I-91/VT 9) was built in its present configuration from the get-go. Here is a photograph (https://glcp.uvm.edu/landscape_new/search/details.php?ls=41074&sequence=000&set_seq=5&imageSet=1634736378-617018fa57cbf&AddRel=) showing an aerial view of the interchange from 1962, a couple years after it opened
Whatever I'm seeing is visible from multiple angles. :confused:
In suburban Cincinnati, I-75 SB exit to Lockland (Exit 12) is nearly a 90 degree right turn.
Toll roads are a haven for strange interchanges. My "favorite" is NB I-65 to WB I-90 (Indiana Toll Road) in Gary, IN. It's a 360 degree loop from I-65 to the toll plaza then onto I-90.
Quote from: vtk on October 22, 2021, 01:08:26 PM
Quote from: froggie on October 20, 2021, 09:28:46 AM
^ You're seeing things. Exit 2 (I-91/VT 9) was built in its present configuration from the get-go. Here is a photograph (https://glcp.uvm.edu/landscape_new/search/details.php?ls=41074&sequence=000&set_seq=5&imageSet=1634736378-617018fa57cbf&AddRel=) showing an aerial view of the interchange from 1962, a couple years after it opened
Whatever I'm seeing is visible from multiple angles. :confused:
I'm aware of what you're seeing at that location. Especially on the southbound side, I can see what one might perceive as flat grading. But I'm pointing out again that the current interchange configuration is what was built from the get-go.
Quote from: Skye on October 22, 2021, 01:46:42 PM
In suburban Cincinnati, I-75 SB exit to Lockland (Exit 12) is nearly a 90 degree right turn.
Also no fixed gore (which is definitely below interstate standards), so some driver could theoretically blow past by on the through movement using the exit only lane. Looking at GSV, it looks like a few people done that already, judging by the skid marks in the gore.
Though this interchange will be removed as part of a future phase of the "Through the Valley" project.
Quote from: froggie on October 23, 2021, 01:01:55 AM
Quote from: vtk on October 22, 2021, 01:08:26 PM
Quote from: froggie on October 20, 2021, 09:28:46 AM
^ You're seeing things. Exit 2 (I-91/VT 9) was built in its present configuration from the get-go. Here is a photograph (https://glcp.uvm.edu/landscape_new/search/details.php?ls=41074&sequence=000&set_seq=5&imageSet=1634736378-617018fa57cbf&AddRel=) showing an aerial view of the interchange from 1962, a couple years after it opened
Whatever I'm seeing is visible from multiple angles. :confused:
I'm aware of what you're seeing at that location. Especially on the southbound side, I can see what one might perceive as flat grading. But I'm pointing out again that the current interchange configuration is what was built from the get-go.
But then why start off with, "you're seeing things", a phrase reserved for when you're alluding to someone imagining something that doesn't exist? The grading (ramp or no ramp) clearly exists.
^ Because they saw what he thought was a half-diamond in that grading. I can understand where one would come to that conclusion but that is definitely not the case here. Though in fairness, I'm more familiar with that interchange than most forum members.
Yes, I don't dispute the historical record here. I'm just confused as to why the embankments are that way. Also, I don't use he/him pronouns anymore.
^ Missed that. Apologies.
Could not tell you why the embankments are that way. While there's a number of I-91 construction photos now online thanks to UVM (University of Vermont), I have yet to find any for that particular interchange. Just some aerial images from a couple years after opening.
Not sure if this fits the thread, but I'm fascinated by this overlapping DDI/SPUI (https://www.google.com/maps/@37.7424161,-88.9539403,15.54z) in Marion, IL. I've never seen two interchanges overlapping like this without any access from one set of ramps to the other, much less with these two relatively new designs.
I'd say it fits.
Worth noting some history there...originally, I-57/IL 13 was a standard cloverleaf and The Hill Ave did not exist over 57. The Hill Ave was built over 57 ca. 2008 along with a single southbound off-ramp. The northbound on-ramp from The Hill was added ca. 2011. 57/13 was converted into a SPUI (along with ramps to/from the south at The Hill and widening 57 through Marion) ca. 2012-14, while The Hill was converted from a standard diamond to a DDI in 2015.
One I just noticed now is the 401 at Hurontario St in Mississauga, ON (Google Maps (https://www.google.ca/maps/place/43%C2%B037'44.3%22N+79%C2%B040'56.8%22W/@43.6289749,-79.6846387,750m/data=!3m2!1e3!4b1!4m6!3m5!1s0x0:0x7b69ba6def94b6b9!7e2!8m2!3d43.6289715!4d-79.6824496)). Exiting EB, the off-ramp splits in two, with a choice of going to Hurontario or Whittle Street. The Whittle Street off-ramp requires two overpasses and simply leads to a small street one block east of Hurontario. Also, the off-ramp for Whittle starts as one-lane, goes up to two-lanes, then goes back down to one-lane before the roundabout at the north end of the Whittle. I'm surprised this off-ramp was built at all, let alone with two-lanes.
Quote from: webny99 on December 03, 2021, 09:06:17 AM
Not sure if this fits the thread, but I'm fascinated by this overlapping DDI/SPUI (https://www.google.com/maps/@37.7424161,-88.9539403,15.54z) in Marion, IL. I've never seen two interchanges overlapping like this without any access from one set of ramps to the other, much less with these two relatively new designs.
I just found that the other day, but wasn't sure where to put it here. You also missed the roundabout on the DDI road. Progressive DOT!
Interchanges can often be close enough that although they may both be necessary, it is not necessary to give access between the ramps. Look at Lindsay St and OK-9 (I-35 exits 208 A/B) in Norman.
Quote from: webny99 on December 03, 2021, 09:06:17 AM
Not sure if this fits the thread, but I'm fascinated by this overlapping DDI/SPUI (https://www.google.com/maps/@37.7424161,-88.9539403,15.54z) in Marion, IL. I've never seen two interchanges overlapping like this without any access from one set of ramps to the other, much less with these two relatively new designs.
That reminds me of this configuration in Wausau, WI: https://www.google.com/maps/@44.9568438,-89.6671109,15.4z
If you ignore the larger WI-29 interchange, it's pretty similar, except there's a half diamond interchange at the lesser road (Sherman), compared to the full DDI at The Hill Ave. I think the one full interchange and one half interchange approach makes more sense. It causes less weaving and costs less.
Quote from: froggie on December 03, 2021, 10:16:35 AM
I'd say it fits.
Worth noting some history there...originally, I-57/IL 13 was a standard cloverleaf and The Hill Ave did not exist over 57. The Hill Ave was built over 57 ca. 2008 along with a single southbound off-ramp. The northbound on-ramp from The Hill was added ca. 2011. 57/13 was converted into a SPUI (along with ramps to/from the south at The Hill and widening 57 through Marion) ca. 2012-14, while The Hill was converted from a standard diamond to a DDI in 2015.
Interesting. That's nearly a decade of changes to get to the current configuration! You can tell from satellite view that I-57/IL 13 used to be a cloverleaf. The cloverleaf could have theoretically been left intact even with The Hill Ave interchange; so it's interesting that it was still changed to a SPUI. Perhaps to avoid confusion with a new interchange in close proximity, or if volumes simply didn't warrant a cloverleaf? Or maybe some combination of both.
Quote from: MCRoads on December 03, 2021, 11:07:38 PM
Interchanges can often be close enough that although they may both be necessary, it is not necessary to give access between the ramps. Look at Lindsay St and OK-9 (I-35 exits 208 A/B) in Norman.
That's true, although in that case, 28th Ave. SW is essentially part of the interchange and serves the same purpose as connecting ramps. The Marion example is a little different because you have to go close to 1/2 mile in either direction (to either Halfway Rd or N Carbon St.) to get between IL 13 and The Hill Ave.
Quote from: thspfc on December 04, 2021, 10:44:40 AM
That reminds me of this configuration in Wausau, WI: https://www.google.com/maps/@44.9568438,-89.6671109,15.4z
If you ignore the larger WI-29 interchange, it's pretty similar, except there's a half diamond interchange at the lesser road (Sherman), compared to the full DDI at The Hill Ave. I think the one full interchange and one half interchange approach makes more sense. It causes less weaving and costs less.
Similar to the above, in this case WI 29 has its own set of ramps to WI 52, which serves the same purpose as the connecting ramps would.
Speaking more generally, in cases with two closely spaced interchanges the most cost-effective solution would be a half-diamond in each location for just four ramps total. Of course, you'd also need a service road or very good connectivity between the two local streets, so I'm not sure if it would work at this particular location or the Marion location, but there is certainly precedent:
I-390 at NY 15/NY 251 (https://www.google.com/maps/@43.0058561,-77.6666771,1146m/data=!3m1!1e3),
NY 5 at Hinsdale Rd/Bennett Rd (https://www.google.com/maps/@43.0563856,-76.273203,1145m/data=!3m1!1e3),
QEW at Christie St/Ontario St/Maple St (https://www.google.com/maps/@43.1979571,-79.557554,571m/data=!3m1!1e3).
For a counter-example, where poor local street connectivity makes this design less desirable and borderline dysfunctional,
I-81 in Pulaski, NY (https://www.google.com/maps/@43.5612456,-76.1160908,2272m/data=!3m1!1e3). This one definitely needs to be two full interchanges; getting off at Pulaski for fuel/services and getting back on requires an absurd six turns over nearly 3 miles.
Quote from: 7/8 on December 03, 2021, 12:36:04 PM
One I just noticed now is the 401 at Hurontario St in Mississauga, ON (Google Maps (https://www.google.ca/maps/place/43%C2%B037'44.3%22N+79%C2%B040'56.8%22W/@43.6289749,-79.6846387,750m/data=!3m2!1e3!4b1!4m6!3m5!1s0x0:0x7b69ba6def94b6b9!7e2!8m2!3d43.6289715!4d-79.6824496)). Exiting EB, the off-ramp splits in two, with a choice of going to Hurontario or Whittle Street. The Whittle Street off-ramp requires two overpasses and simply leads to a small street one block east of Hurontario. Also, the off-ramp for Whittle starts as one-lane, goes up to two-lanes, then goes back down to one-lane before the roundabout at the north end of the Whittle. I'm surprised this off-ramp was built at all, let alone with two-lanes.
Interesting concept! It certainly makes it easier for freeway traffic to access the commercial development on Britannia Ave, as it avoids the right turn, weave, and subsequent left turn. I am intrigued by the second lane though; I can't imagine it's really warranted and the fact that it ends before the roundabout means that it's essentially a passing lane. Can't say I've ever seen something like that for a freeway ramp before.
Quote from: webny99 on December 04, 2021, 12:06:18 PM
For a counter-example, where poor local street connectivity makes this design less desirable and borderline dysfunctional, I-81 in Pulaski, NY (https://www.google.com/maps/@43.5612456,-76.1160908,2272m/data=!3m1!1e3). This one definitely needs to be two full interchanges; getting off at Pulaski for fuel/services and getting back on requires an absurd six turns over nearly 3 miles.
Such upgrades would be such a low priority that it brings to mind one of Space Ghost's interviews:
Nobody cares, Moby. Nobody.
Quote from: Rothman on December 04, 2021, 04:14:00 PM
Quote from: webny99 on December 04, 2021, 12:06:18 PM
For a counter-example, where poor local street connectivity makes this design less desirable and borderline dysfunctional, I-81 in Pulaski, NY (https://www.google.com/maps/@43.5612456,-76.1160908,2272m/data=!3m1!1e3). This one definitely needs to be two full interchanges; getting off at Pulaski for fuel/services and getting back on requires an absurd six turns over nearly 3 miles.
Such upgrades would be such a low priority that it brings to mind one of Space Ghost's interviews:
Nobody cares, Moby. Nobody.
Only because it's the middle of nowhere. Throw that configuration in a city or suburb and it would be a nightmare.
Quote from: webny99 on December 04, 2021, 05:18:04 PM
Quote from: Rothman on December 04, 2021, 04:14:00 PM
Quote from: webny99 on December 04, 2021, 12:06:18 PM
For a counter-example, where poor local street connectivity makes this design less desirable and borderline dysfunctional, I-81 in Pulaski, NY (https://www.google.com/maps/@43.5612456,-76.1160908,2272m/data=!3m1!1e3). This one definitely needs to be two full interchanges; getting off at Pulaski for fuel/services and getting back on requires an absurd six turns over nearly 3 miles.
Such upgrades would be such a low priority that it brings to mind one of Space Ghost's interviews:
Nobody cares, Moby. Nobody.
Only because it's the middle of nowhere. Throw that configuration in a city or suburb and it would be a nightmare.
Let me know when you come back from Fantasyland. ;D
Stuff like I-81 in Pulaski is why I don't like getting off the interstate without planning in advance. That gap is so large that both directions might not even have the same exit number when I-81 goes mile-based (unless they decide to fudge one of the directions).
That should in no way be treated as a single interchange. In other words, the exit numbers should be different even without converting to mile-based.
Believe that is what A - B - C suffixes are for. Have no idea if that is standard.
My fix for the I-81/Pulaski situation, which is basically a split diamond with no direct connection between the two halves, would be simply to place "No Re-entry In Same Direction" signs (for which a standard design exists in Ohio and possibly other states) on the approach to both exit ramps.
Was this segment of I-81 built fairly early in the era of first Interstate construction? There is a similar succession of restricted-access interchanges a bit further north in Lacona.
Quote from: J N Winkler on December 05, 2021, 12:29:14 PM
My fix for the I-81/Pulaski situation, which is basically a split diamond with no direct connection between the two halves, would be simply to place "No Re-entry In Same Direction" signs (for which a standard design exists in Ohio and possibly other states) on the approach to both exit ramps.
Certainly agreed. I've seen variations of this type of signage in
Pennsylvania (https://www.google.com/maps/@41.3309464,-77.0917332,3a,15y,208.94h,89.63t/data=!3m6!1e1!3m4!1sq7i2Y1tVYFjPwgIXtrXsGw!2e0!7i13312!8i6656!5m1!1e1) and
Maryland (https://www.google.com/maps/@39.4601104,-76.6554548,3a,30y,306.38h,94t/data=!3m6!1e1!3m4!1scdH2zff2E5pgFVbpnbkHDA!2e0!7i16384!8i8192!5m1!1e1), but to my knowledge no variations of this are used in New York. NYSDOT seems to prefer supplementary "TO I-81" banners, and in fairness, these do appear at both half-diamond interchanges and at the
intersections (https://www.google.com/maps/@43.5618441,-76.125987,3a,15y,334.31h,90.72t/data=!3m6!1e1!3m4!1sda5pCTsfj7icFBrdjZTwdw!2e0!7i16384!8i8192!5m1!1e1)
in between (https://www.google.com/maps/@43.5676093,-76.1269791,3a,37.5y,52.35h,86.66t/data=!3m7!1e1!3m5!1sZDoa9Oj2PM-rM4TCazKrEA!2e0!6shttps:%2F%2Fstreetviewpixels-pa.googleapis.com%2Fv1%2Fthumbnail%3Fpanoid%3DZDoa9Oj2PM-rM4TCazKrEA%26cb_client%3Dmaps_sv.tactile.gps%26w%3D203%26h%3D100%26yaw%3D333.13596%26pitch%3D0%26thumbfov%3D100!7i16384!8i8192!5m1!1e1), such that anyone who exits and wishes to re-enter would theoretically be able to follow signage to do so. IMO it's not an excuse not to inform drivers
before they exit, but I suspect it to be NYSDOT's reasoning nonetheless.
Quote from: J N Winkler on December 05, 2021, 12:29:14 PM
Was this segment of I-81 built fairly early in the era of first Interstate construction? There is a similar succession of restricted-access interchanges a bit further north in Lacona.
The first sections of I-81 north of Syracuse opened in the late 1950's, but both the Pulaski and Lacona interchanges appear to be part of the section that opened in 1961, at least according to Wikipedia.
Quote from: webny99 on December 05, 2021, 02:38:58 PM
Quote from: J N Winkler on December 05, 2021, 12:29:14 PM
My fix for the I-81/Pulaski situation, which is basically a split diamond with no direct connection between the two halves, would be simply to place "No Re-entry In Same Direction" signs (for which a standard design exists in Ohio and possibly other states) on the approach to both exit ramps.
Certainly agreed. I've seen variations of this type of signage in Pennsylvania (https://www.google.com/maps/@41.3309464,-77.0917332,3a,15y,208.94h,89.63t/data=!3m6!1e1!3m4!1sq7i2Y1tVYFjPwgIXtrXsGw!2e0!7i13312!8i6656!5m1!1e1) and Maryland (https://www.google.com/maps/@39.4601104,-76.6554548,3a,30y,306.38h,94t/data=!3m6!1e1!3m4!1scdH2zff2E5pgFVbpnbkHDA!2e0!7i16384!8i8192!5m1!1e1), but to my knowledge no variations of this are used in New York.
Oddly enough, such signage used to be used on I-88 (https://www.google.com/maps/@42.4425034,-75.0868282,3a,31.2y,124.74h,86.36t/data=!3m6!1e1!3m4!1s19hxKLHtdyaU7WAOL26Idg!2e0!7i13312!8i6656) but no longer is. There's also this odd exit (https://www.google.com/maps/@43.1542825,-76.141987,3a,15y,314.81h,89.86t/data=!3m6!1e1!3m4!1s0cx5fDPZyaWSDKjooVjshw!2e0!7i16384!8i8192).
Quote from: vdeane on December 05, 2021, 03:15:43 PM
There's also this odd exit (https://www.google.com/maps/@43.1542825,-76.141987,3a,15y,314.81h,89.86t/data=!3m6!1e1!3m4!1s0cx5fDPZyaWSDKjooVjshw!2e0!7i16384!8i8192).
Which, to bring things full circle, happens to be a pretty good candidate for this thread! :D
I've never understood why that one ramp exists without any counterpart whatsoever. At least a southbound entrance ramp would be nice, and you could probably make the case for a full interchange, especially if there was better access to the development south of Mud Creek.
Quote from: webny99 on December 05, 2021, 03:32:40 PM
Quote from: vdeane on December 05, 2021, 03:15:43 PM
There's also this odd exit (https://www.google.com/maps/@43.1542825,-76.141987,3a,15y,314.81h,89.86t/data=!3m6!1e1!3m4!1s0cx5fDPZyaWSDKjooVjshw!2e0!7i16384!8i8192).
Which, to bring things full circle, happens to be a pretty good candidate for this thread! :D
I've never understood why that one ramp exists without any counterpart whatsoever. At least a southbound entrance ramp would be nice, and you could probably make the case for a full interchange, especially if there was better access to the development south of Mud Creek.
I would have thought vdeane would have recognized one of the largest wetland areas in the region...
Oddly enough, the one-ramper was just discussed at SMTC. Never going to be a full interchange due to the gigantic wetland issue.
Quote from: DJStephens on December 05, 2021, 11:40:35 AM
Believe that is what A - B - C suffixes are for. Have no idea if that is standard.
In a sequential numbering system, I would have used separate numbers. It's not a violation for exit numbers to be skipped in one direction if they exist in the other direction. At least that is how Georgia had handled it back when it was a sequential exit state.
IDK if these count but here is a SPUI next to a bunch of ramps which I can't describe what they look like
https://www.google.com/maps/@44.7921525,-91.4533738,1482m/data=!3m1!1e3?hl=en
This is an interchange where one of the exits go off way to soon
https://www.google.com/maps/@44.7707878,-91.4244258,620m/data=!3m1!1e3?hl=en
Quote from: webny99 on December 05, 2021, 02:38:58 PMQuote from: J N Winkler on December 05, 2021, 12:29:14 PMWas this segment of I-81 built fairly early in the era of first Interstate construction? There is a similar succession of restricted-access interchanges a bit further north in Lacona.
The first sections of I-81 north of Syracuse opened in the late 1950's, but both the Pulaski and Lacona interchanges appear to be part of the section that opened in 1961, at least according to Wikipedia.
Thanks--I wondered, because FHWA has become more strict about there being no missing movements. It seems these interchanges were planned and approved when things were much looser.
Quote from: Rothman on December 05, 2021, 05:34:04 PM
Quote from: webny99 on December 05, 2021, 03:32:40 PM
Quote from: vdeane on December 05, 2021, 03:15:43 PM
There's also this odd exit (https://www.google.com/maps/@43.1542825,-76.141987,3a,15y,314.81h,89.86t/data=!3m6!1e1!3m4!1s0cx5fDPZyaWSDKjooVjshw!2e0!7i16384!8i8192).
Which, to bring things full circle, happens to be a pretty good candidate for this thread! :D
I've never understood why that one ramp exists without any counterpart whatsoever. At least a southbound entrance ramp would be nice, and you could probably make the case for a full interchange, especially if there was better access to the development south of Mud Creek.
I would have thought vdeane would have recognized one of the largest wetland areas in the region...
Oddly enough, the one-ramper was just discussed at SMTC. Never going to be a full interchange due to the gigantic wetland issue.
1. Don't blame me for webny99's interchange/access concept.
2. I was only looking for the sign, but at one point, one has to wonder why even that ramp was built. Given that traffic can't get back on, it would seem that that ramp would have limited utility.
Yeah, it was me that brought the wetlands up. I was not aware of the issues there, presumably environmental. But it certainly makes sense that that's why there's no development or thru N/S roads in that area.
Quote from: webny99 on December 05, 2021, 10:32:29 PM
Yeah, it was me that brought the wetlands up.
No, I did, in terms of the one-ramp exit off of 481.
I wasn't blaming vdeane, but she did call it an odd exit. And it certainly is odd, and the wetlands are why, of which I was surprised she was unaware.
The ramp just provides access to the community for returning commuters from Syracuse.
I'm sure they could fit a flyover with a tight merge if they really wanted.
I find it more odd that they build the off-ramp fully knowing they wouldn't build a parallel on-ramp. That's pretty unusual even if one ramp was much easier/less environmentally destructive than the other.
Quote from: jakeroot on December 06, 2021, 01:34:53 PM
I'm sure they could fit a flyover with a tight merge if they really wanted.
I find it more odd that they build the off-ramp fully knowing they wouldn't build a parallel on-ramp. That's pretty unusual even if one ramp was much easier/less environmentally destructive than the other.
Welcome to the East.
Quote from: Rothman on December 06, 2021, 04:50:41 PM
Quote from: jakeroot on December 06, 2021, 01:34:53 PM
I'm sure they could fit a flyover with a tight merge if they really wanted.
I find it more odd that they build the off-ramp fully knowing they wouldn't build a parallel on-ramp. That's pretty unusual even if one ramp was much easier/less environmentally destructive than the other.
Welcome to the East.
Seattle says hello (https://www.google.com/maps/@47.5271402,-122.3241733,632m/data=!3m1!1e3).
I've always found this interchange off the 215 at CA-74 east near Hemet, California to be odd.
Case street is south of the train tracks and runs along them to the northwest. Highway 74 is north of the train tracks and runs along them to the southeast. Before the US 395 expressway bridge (later I-215) was built, Case Avenue met Highway 74 and US 395 in an at-grade, four-way intersection that was bisected diagonally by the train tracks.
(https://i.imgur.com/IiFHaPX.jpg)
When they built the expressway over the tracks and the offramp, they basically relegated Case Avenue as a non-essential route and focused the movements for the offramp to the Highway 74 movement.
(https://i.imgur.com/s7Qixuj.jpg)
Quote from: jakeroot on December 06, 2021, 04:55:16 PM
Quote from: Rothman on December 06, 2021, 04:50:41 PM
Quote from: jakeroot on December 06, 2021, 01:34:53 PM
I'm sure they could fit a flyover with a tight merge if they really wanted.
I find it more odd that they build the off-ramp fully knowing they wouldn't build a parallel on-ramp. That's pretty unusual even if one ramp was much easier/less environmentally destructive than the other.
Welcome to the East.
Seattle says hello (https://www.google.com/maps/@47.5271402,-122.3241733,632m/data=!3m1!1e3).
There was, at one point, a southbound off ramp to go along with that one, which connected up to S Trenton St here (https://www.google.com/maps/@47.524787,-122.3239253,3a,75y,359.32h,80.13t/data=!3m6!1e1!3m4!1sAuazdF54tWJpvUEJrMSDXg!2e0!7i16384!8i8192). It seems to have been removed when the second 1st Ave S bridge was built, and I'm not sure why as it seems like it would still be useful.
I just dropped by to say, it feels like a missed opportunity that this thread wasn't titled as I've done here. :spin:
Oh Florida, what are you smoking?
(https://media.bizj.us/view/img/12049407/i-95-at-sr-16-interchange*1200xx18000-10125-0-188.jpg)
Quote from: MCRoads on December 13, 2021, 01:23:44 PM
Oh Florida, what are you smoking?
(https://media.bizj.us/view/img/12049407/i-95-at-sr-16-interchange*1200xx18000-10125-0-188.jpg)
It looks like this is done so that traffic entering the highway queues up in the loop, and then can be run on the same light cycle as the exiting traffic turning left. Instead of queueing on the bridge and waiting for an arrow.
Seems like if you are willing to use the extra ROW for this, maybe a roundabout interchange could work better here.
Looks like a DDI, but it isn't. Strange. What would be the main reason not to use either a DDI or a SPUI here?
SPUI would require rebuilding the bridges on 95 over 16 so that one's probably out. I do have to ask why a DDI wasn't considered...I don't see what advantage this looped left turn would give over a DDI.
To me, it looks (and probably functions) like a combination of a CFI, a normal diamond interchange, and a SPUI. I like it.
As for my own contribution to this thread, here is this bizarre Texanized CFI in San Marcos, TX:
https://www.google.com/maps/@29.8826011,-97.9212863,407m/data=!3m1!1e3
If the idea is to allow traffic coming off the freeway and traffic entering the freeway to enter at the same time, the capacity for the on-ramp would seem to only be as high as the number of cars that could be stored in the loop section beyond the signal, something that seems to be of very low capacity, even for the loop with the double lane section. Further, the interchange is still limited in capacity by the overlapping off-ramp movements; even allowing simultaneous on and off ramp movements would not eliminate this other issue (something that would be solved with a DDI).
I would assume a DDI is not being used here because of the high levels of through traffic? It's not quite clear to me why they need extra capacity at this location. If there is an issue with left turn cycle length, I would think double left turns at the ramp terminals would be a more than sufficient improvement.
Quote from: empirestate on December 12, 2021, 09:56:54 PM
I just dropped by to say, it feels like a missed opportunity that this thread wasn't titled as I've done here. :spin:
Interstranges
Quote from: formulanone on December 18, 2021, 10:20:12 AM
Quote from: empirestate on December 12, 2021, 09:56:54 PM
I just dropped by to say, it feels like a missed opportunity that this thread wasn't titled as I've done here. :spin:
Interstranges
Yes, that one...but did you un-edit my subject line so as to take the credit for yourself? :-D
A hybrid directional and trumpet three-way interchange (https://www.google.com/maps/@52.9244665,-1.469908,245m/data=!3m1!1e3) in Derby, England.
I have to say this (https://www.google.com/maps/@35.568152,-78.1671256,455m/data=!3m1!1e3) interchange is weird because of the ramp entering North I-95 is smaller compared to the other ramps. And the reason that could be is because it used to have a very short merging distance because the Little River bridge was only 2 lanes when it was built. But it later got fixed. And I'm sure this interchange will be redesigned when it gets rebuilt.
https://goo.gl/maps/DAip4RBXsBox5NpW9
Rather than start a new topic, but to add to the list, above is one that is strange, but very safe as the curb prevents weaving from US 9W traffic in the right on ramp lane from aggressively entering the I-95 express road.
So strange in setup, but practical in use.
Here's an interchange I've been through hundreds of times, but I could never draw it for you. I couldn't draw it two seconds after carefully examining the map. It's the connection between I-95 and US-1 in Lynnfield, MA.
https://goo.gl/maps/9LgVmbJs5gXMK2K29 (https://goo.gl/maps/9LgVmbJs5gXMK2K29)
Quote from: pderocco on May 13, 2023, 12:39:25 AM
Here's an interchange I've been through hundreds of times, but I could never draw it for you. I couldn't draw it two seconds after carefully examining the map. It's the connection between I-95 and US-1 in Lynnfield, MA.
https://goo.gl/maps/9LgVmbJs5gXMK2K29 (https://goo.gl/maps/9LgVmbJs5gXMK2K29)
Likely built that way, due to "packing in" of the area around US -1 and Route 128. Appears to be an old style turnpike style of interchange, offset from the crossing itself. 128 was first envisioned in the 1920's and built as a four lane divided in late forties / early fifties. It was largely rebuilt in the very early sixties as a mostly eight lane between US -1 on the south and north ends.
Two pieces, that should have been opened up to a 4 x 4 cross-section, then in the early sixties, inexplicably weren't. Rte 24 to Rte 9, and also between I-93 up to US 1. The southwestern quadrant was finally opened up to 4 x 4 in more recent times. The older "original" four lane 128 section was very apparent E of Lynnfield/Peabody heading towards Gloucester.
95 "ended" for close to twenty years, N of 128, where it was directly E of US - 1, before a T directional connection was built with 128. For quite a long time, it certainly appeared that it would never be connected properly with 128.
This whole Tonnelle Circle complex is something else... (https://www.google.com/maps/@40.7396687,-74.071458,16.63z)
This is like when I build an intersection in Cities Skylines and it becomes congested so I start making modifications and adding ramps and flyovers but it just keeps jamming up so I keep adding more ramps and flyovers and it becomes an indecipherable monstrous spaghetti mess.
Outside St. Paul, the interchanges on Rice Street with I-694 in Shoreview and TH 36 in Little Canada where standard diamonds were rebuilt with all ramps intersecting on the north side.
https://www.google.com/maps/place/Shoreview,+MN+55126/@45.0451238,-93.1080752,16.34z/data=!4m6!3m5!1s0x52b3284144d1f63d:0xe1b163efa743d156!8m2!3d45.0791325!4d-93.1471667!16zL20vMHdmbWg
https://www.google.com/maps/place/County+Rd+49,+Little+Canada,+MN+55113/@45.0080318,-93.1098242,16.43z/data=!4m15!1m8!3m7!1s0x52b3284144d1f63d:0xe1b163efa743d156!2sShoreview,+MN+55126!3b1!8m2!3d45.0791325!4d-93.1471667!16zL20vMHdmbWg!3m5!1s0x52b32a76f408b819:0xe5cc8ed729ee7906!8m2!3d45.0077841!4d-93.1059939!16s%2Fg%2F11g64p8x2k
Quote from: empirestate on December 18, 2021, 12:00:26 PM
Quote from: formulanone on December 18, 2021, 10:20:12 AM
Quote from: empirestate on December 12, 2021, 09:56:54 PM
I just dropped by to say, it feels like a missed opportunity that this thread wasn't titled as I've done here. :spin:
Interstranges
Yes, that one…but did you un-edit my subject line so as to take the credit for yourself? :-D
No, I just guessed! I'd say great minds think alike, but you don't want one as forgetful as mine.
If I quote something, it seems to automatically retains the thread title's subject line. I avoid modifying the subject title unless it's the OP (I used to remove the redundant "Re:" but the mods said that messed things up).
But I modified it here just because I forgot one can do that.
Earlier in this thread, someone mentioned I-205 in Portland, OR where it runs alongside I-84, which is cool. Just up the road in Vancouver, WA is this lovely interchange with WA-14:
https://goo.gl/maps/KMwGEcSPeb8BfgUn7 (https://goo.gl/maps/KMwGEcSPeb8BfgUn7)
14 runs along the edge of a plateau, so there's no place to put ramps south of the road. They squeezed a C-D lane in, too. There's also a bike lane up the middle of I-205, which disappears down a ramp and comes out right next to 14 (and which has Street View imagery).
Probably the most complicated interchange I've encountered is in Boston between I-90 and I-93, at the south end of the Big Dig.
https://goo.gl/maps/uhuzddHQKpMigR3E8 (https://goo.gl/maps/uhuzddHQKpMigR3E8)
It's especially gnarly on a map, where you can see the subterranean stuff too.
Quote from: pderocco on June 09, 2023, 01:29:05 AM
Probably the most complicated interchange I've encountered is in Boston between I-90 and I-93, at the south end of the Big Dig.
https://goo.gl/maps/uhuzddHQKpMigR3E8 (https://goo.gl/maps/uhuzddHQKpMigR3E8)
It's especially gnarly on a map, where you can see the subterranean stuff too.
It's actually better than the old pre-Big Dig interchange, although more complex.
Found this interesting cloverleaf variant in Brazil between Rio and São Paulo:
https://www.google.com/maps/@-23.3079909,-46.0463033,2593m/data=!3m1!1e3?entry=ttu
Looks like it solves the majority of the weaving problems that normal cloverleafs have.
Apologies if this one has been brought up before in this thread, but to me, the epitome of 'strange' interchanges has to be the Golden Glades Interchange in the Miami, FL area. To me, it is _the_ one that should be scraped off are restarted from scratch before all others.
https://goo.gl/maps/g2gRJCTiPqbjh4Zj9
Mike
Quote from: mgk920 on June 09, 2023, 12:04:27 PM
Apologies if this one has been brought up before in this thread, but to me, the epitome of 'strange' interchanges has to be the Golden Glades Interchange in the Miami, FL area. To me, it is _the_ one that should be scraped off are restarted from scratch before all others.
https://goo.gl/maps/g2gRJCTiPqbjh4Zj9
Mike
South Florida's interchanges are quite literally built different in terms of how convoluted they can get. Here's the....interesting junction of I-595, Florida's Turnpike, and US 441. Oh, and Marina Mile Boulevard and I-595's express lanes for good measure: https://goo.gl/maps/s6kwtSThGmxMpGrXA
Quote from: SilverMustang2011 on July 01, 2023, 08:18:34 PM
South Florida's interchanges are quite literally built different in terms of how convoluted they can get. Here's the....interesting junction of I-595, Florida's Turnpike, and US 441. Oh, and Marina Mile Boulevard and I-595's express lanes for good measure: https://goo.gl/maps/s6kwtSThGmxMpGrXA
Google Maps calls that "Hacienda Village". According to Wikipedia, this village was entirely wiped out by the construction of I-595. It was known for funding its entire budget off traffic tickets, due to obscure speed limit postings. Looks like they finally got their comeuppance.
Quote from: pderocco on July 02, 2023, 06:45:16 PM
Quote from: SilverMustang2011 on July 01, 2023, 08:18:34 PM
South Florida's interchanges are quite literally built different in terms of how convoluted they can get. Here's the....interesting junction of I-595, Florida's Turnpike, and US 441. Oh, and Marina Mile Boulevard and I-595's express lanes for good measure: https://goo.gl/maps/s6kwtSThGmxMpGrXA
Google Maps calls that "Hacienda Village". According to Wikipedia, this village was entirely wiped out by the construction of I-595. It was known for funding its entire budget off traffic tickets, due to obscure speed limit postings. Looks like they finally got their comeuppance.
Wow, this place almost makes Waldo or Lawtey's speed traps look reasonable.
Quote from: realjd on March 30, 2011, 02:59:24 PM
I-69 at Coldwater Road in Fort Wayne, IN. Loop ramps, left merges, and an usual connector road for a side street in the median next to an old cemetery.
In case you didn't know, when this complex junction was built in the mid-1960s, Coldwater Road still carried U.S. Highway 27. The presence of the cemetery and then high-volume of traffic on Coldwater both complicated the design of that interchange by preventing construction of the typical (for the time) cloverleaf. US 27 was later rerouted to take Lima Road north from Clinton Street to I-69, where it then joined the Interstate on a multiplex all the way to Michigan. It was subsequently truncated nationally, and the Lima Road (Indiana S.R. 3) interchange (original Exit 111 on I-69, now 311) became the northern terminus for US 27 (as well as the southern terminus of the northern section of IN 3, which used to go all the way through the Summit City).