What interstate to interstate connections are not full expressway-grade? I don't mean things like Breezewood, I mean more like just slow-speed connections, or with weird exits as part of it? The one which comes to mind to me is I-64 east to I-564 east, or the reverse of I-564 west to I-64 west. It's rather slow-speed, and there is an exit to Granby Street sandwiched in there, too. What other examples exist?
I-84 to I-91, with the exception of the connections made by CT 15, are all slow speed (35 MPH, I believe). I-91 is I-95 are pretty slow speed (40 MPH). Any interstate that connects to an interstate that is a closed ticket toll road is going to be low speed because some will have to stop and take a ticket or pay a toll, and many have EZ-Pass lanes with a 15 MPH or lower speed limit. I-95 to I-87 is always a no speed connection because it's always backed up :)
(Extended) Chicago area and Northern IL:
I-80 thru from the Indiana Toll Road/I-80/90 to the Borman Expressway/I-80/94 in NW Indiana, using the Dual Trumpet...
I-294/Tri-State Tollway North to I-55 South
I-55 and I-80, full Cloverleaf
I-39 and I-88, full Cloverleaf
I-39 and I-80, full Cloverleaf
Downtown Chicago, I-290/Eisenhower Expressway and I-90/94/JFK Expressway/Dan Ryan Expressway/the Jane Byrne Circle Interchange
I-294 North/I-88 East to I-290 West
I-290/IL-53 and I-90/Jane Addams Tollway, full Cloverleaf
I-355 North to I-55 South
I-80 and I-88, full Cloverleaf
I-74 and I-280, full Cloverleaf
I-74, I-80, and I-280, full Cloverleaf
Louisville: Any Interstate movement involving I-265
Sikeston, MO: I-55 and I-57/US 60: full Cloverleaf
Down in Memphis, I-55 North thru traffic to cross the Mississippi...
Really, isn't any Interstate to Interstate movement with a Loop ramp a low-speed connection?
My favorite, tho, is probably I-76 and I-80, when I-80 Eastbound leave the OH Turnpike, or I-76 Westbound leaves the OH Turnpike, on the Double Trumpet, especially since the Interstates technically don't Intersect, despite having an Interchange -- they "bump"/touch at a Point
I-81/I-476 (northern one) is very slow speed. Triple trumpet design (with US 11), stop signs on the ramps (pretty sure 0 mph counts as "slow") despite not having at-grades, and that 35 mph curve on the I-476 mainline (with the limit continuing another mile south for some reason). Also, toll booth.
I-81/I-90 is your typical Thruway double trumpet.
I-90/NY 85 also has a very tight loop ramp.
Quote from: jp the roadgeek on June 03, 2017, 10:21:34 PM
I-84 to I-91, with the exception of the connections made by CT 15, are all slow speed (35 MPH, I believe).
Since it's clogged half the time, it's mostly driving even slower than that.
In SLC, both loop ramps at the I-15/215 south interchange and the loop ramp at the west 215/80 interchange have 25 mph advisory speed limits.
I-79/I-80. It's a tight cloverleaf, so four direction (E-N, W-S, N-W, S-E) are tight turns signed at 25mph for trucks. Even the outside curves for the other four changes aren't that fast, either as they hug the cloverleaf tightly instead of allowing a longer straightaway.
Most of what you're going to see listed here are cloverleafs, I think.
I-44/I-235 and I-35/I-240 definitely both fit the bill (although both are in the progress of being upgraded with a couple of flyovers).
All of them in Massachusetts, maybe except for 95/495 in Salisbury.
I-91 to I-391 isn't that slow, is it?
SB 91 to NB 391, and its reciprocal, have a 30 MPH advisory. Appears to meet the OP's criteria.
I95 to i76 in Philadelphia. Slow, missing movements, any eastbound connection has to use city streets.
I76 to I76, From the toll road to the free section of 76. Trumpet, toll booth.
I69 to I24 in Eddyville KY. Trumpet type.
I55 to I55 in St Louis MO. Tight Ramps, 15mph
I195 to I95 in NJ. Double Trumpet with the Turnpike.
I78/i95/Turnpike Newark Bay Extension. i78 must come to a complete stop, slow ramps to connect beyond the booths.
I20 to I285 Atlanta. Left hand exits with a tight turn coming from 285, tight ramps going from 20 to 285 on the western end, eastern end is just as bad. All trucks must use it yet they haven't thought about making it safer for them.
I49 to I49 via I44. Going north off 44 through carthage MO is a tight ramp and substandard. The connection to 49 through Joplin from 44 is not as bad but isn't optimal.
I81 to I77 in Wytheville VA, weird configuration all around on both ends.
us50/I595 and I495/95 in Maryland/DC area. A mess.
The I-690 westbound ramp to I-90/Thruway (https://www.google.com/maps/@43.1120605,-76.2864927,3a,66.8y,286.82h,90.03t/data=!3m4!1e1!3m2!1sBBwvYQbEJTkLkp6zUcDGZw!2e0) is pretty tight.
I-64 east to I-75 north. A loop ramp with an advisory speed of 25 mph.
I-76 to I-676 (Schuylkill to Vine) in Philly, been rebuilt twice and still a mess.
Michigan (Detroit) I-75 to I-75, 25 mph as I recall.
Any freeway-freeway interchange in Los Angeles County or Orange County in California that features a ramp meter on the ramp (yes, these are pretty common in the Southland). Here's (https://www.google.com/maps/@33.9316915,-118.3609529,3a,75y,71.71h,75.77t/data=!3m6!1e1!3m4!1sVTKI5490AdINqyyLEXSilg!2e0!7i13312!8i6656) an example on a ramp leaving the impressive stack interchange at the junction of I-405 and I-105 (traffic from I-405 southbound to I-105 eastbound) near LAX.
Here's (https://www.google.com/maps/@33.9285858,-118.3682353,3a,75y,3.13h,75.46t/data=!3m6!1e1!3m4!1sda5as4A3oEyiRjFL9OFYcw!2e0!7i13312!8i6656) a view of the stack from the northbound lanes of I-405.
Quote from: cpzilliacus on June 09, 2017, 08:19:24 PM
Any freeway-freeway interchange in Los Angeles County or Orange County in California that features a ramp meter on the ramp (yes, these are pretty common in the Southland). Here's (https://www.google.com/maps/@33.9316915,-118.3609529,3a,75y,71.71h,75.77t/data=!3m6!1e1!3m4!1sVTKI5490AdINqyyLEXSilg!2e0!7i13312!8i6656) an example on a ramp leaving the impressive stack interchange at the junction of I-405 and I-105 (traffic from I-405 southbound to I-105 eastbound) near LAX.
Here's (https://www.google.com/maps/@33.9285858,-118.3682353,3a,75y,3.13h,75.46t/data=!3m6!1e1!3m4!1sda5as4A3oEyiRjFL9OFYcw!2e0!7i13312!8i6656) a view of the stack from the northbound lanes of I-405.
I have never heard of ramp meters on freeway-freeway interchanges. Is there any other place besides south CA that has them on these?
I-73 N to I-85 S. Full cloverleaf. Definitely left over from when I-73 was just US 220
Quote from: roadguy2 on June 09, 2017, 11:13:13 PM
Quote from: cpzilliacus on June 09, 2017, 08:19:24 PM
Any freeway-freeway interchange in Los Angeles County or Orange County in California that features a ramp meter on the ramp (yes, these are pretty common in the Southland). Here's (https://www.google.com/maps/@33.9316915,-118.3609529,3a,75y,71.71h,75.77t/data=!3m6!1e1!3m4!1sVTKI5490AdINqyyLEXSilg!2e0!7i13312!8i6656) an example on a ramp leaving the impressive stack interchange at the junction of I-405 and I-105 (traffic from I-405 southbound to I-105 eastbound) near LAX.
Here's (https://www.google.com/maps/@33.9285858,-118.3682353,3a,75y,3.13h,75.46t/data=!3m6!1e1!3m4!1sda5as4A3oEyiRjFL9OFYcw!2e0!7i13312!8i6656) a view of the stack from the northbound lanes of I-405.
I have never heard of ramp meters on freeway-freeway interchanges. Is there any other place besides south CA that has them on these?
I have not seen them elsewhere with my own eyes, but I have been told that they do exist in other places.
Quote from: cpzilliacus on June 10, 2017, 12:10:18 AM
Quote from: roadguy2 on June 09, 2017, 11:13:13 PM
Quote from: cpzilliacus on June 09, 2017, 08:19:24 PM
Any freeway-freeway interchange in Los Angeles County or Orange County in California that features a ramp meter on the ramp (yes, these are pretty common in the Southland). Here's (https://www.google.com/maps/@33.9316915,-118.3609529,3a,75y,71.71h,75.77t/data=!3m6!1e1!3m4!1sVTKI5490AdINqyyLEXSilg!2e0!7i13312!8i6656) an example on a ramp leaving the impressive stack interchange at the junction of I-405 and I-105 (traffic from I-405 southbound to I-105 eastbound) near LAX.
Here's (https://www.google.com/maps/@33.9285858,-118.3682353,3a,75y,3.13h,75.46t/data=!3m6!1e1!3m4!1sda5as4A3oEyiRjFL9OFYcw!2e0!7i13312!8i6656) a view of the stack from the northbound lanes of I-405.
I have never heard of ramp meters on freeway-freeway interchanges. Is there any other place besides south CA that has them on these?
I have not seen them elsewhere with my own eyes, but I have been told that they do exist in other places.
This is common in the Twin Cities.
I would also consider the ramp meters a special case, as they typically operate during peak periods where your mainline is likely slow and congested to begin with.
I-90 to I-390 southbound in Henrietta, NY (https://www.google.com/maps/@43.0521058,-77.6475105,3a,66.8y,171.3h,90.75t/data=!3m4!1e1!3m2!1sNXXL-GS1tbaHnQFxZ8aeIQ!2e0) has YIELD signs. This Interstate-to-Interstate movement must yield to traffic entering I-390 southbound from Lehigh Station Road.
Quote from: SteveG1988 on June 09, 2017, 08:57:10 AM
I55 to I55 in St Louis MO. Tight Ramps, 15mph
Assuming the advisory speed has not been reduced since the last time the Streetview van or I was through there, those are 20 mph ramps (when not at a stop due to congestion). Streetview of advance sign for northbound I-55 (https://www.google.com/maps/@38.6153884,-90.1929839,3a,75y,97.33h,90t/data=!3m6!1e1!3m4!1s1PDfkJfUasIWkmQPHg31Kg!2e0!7i13312!8i6656?hl=en)
Also I-55 NB to I-44 WB a few miles to the south - a nasty 20 mph left side to left side ramp.
I-39 SB to I-90/94 NB near Portage, WI
I-43 ends at a cloverleaf with I-90 (The interstate replaced WIS 15 as the designated route #)
I-90 WB to I-39 SB at Cherry Valley (Rockford) IL - leftover ramp from the former trumpet. (Another overlay interstate in 39)
I-255 to I-55 Southbound is pretty slow.
https://goo.gl/maps/2TAMgByk2i42 (https://goo.gl/maps/2TAMgByk2i42)
Advised speed of 25 miles per hour.
I can think of two instances in New England where there is a high speed interstate-to-interstate connection. The first, on Route 128 in Masse... I-93 SB to I-95 NB and I-95 SB to I-93 NB in Canton/Dedham, MA. The only reason is because the "thru route" is 95S->93N and 93S->95N since I-95 exits from itself here. Speed limit for these connections is the posted 55, meanwhile 95NB has to negotiate a 25 MPH sharp ramp as it exits from itself to enter itself again. The second being the I-93/I-293 connection just north of Manchester, NH, where I-93 "exits" the Everett Turnpike and the turnpike becomes I-293.
Elswhere, in Mass you have the I-95/I-93 interchange in Woburn which is a chronically-congested cloverleaf. Same goes for I-93/I-495 in Lowell. Any interstate connecting to/from I-90 is also a low speed, as its trumpet-toll plaza territory, and in the case of the I-91 interchange, there's 3 trumpets there. I-90/I-291 has a trumpet leading into a traffic light. I-290/I-395 is a seamless connection at high speed (55 mph) - whoops, guess that makes 3! But in reality, it should just be signed as one route.
In VT, I-89 and I-91 is definitely not a high-speed connection, with a modified cloverleaf. Same with I-89 and I-93 in Bow, NH. I-93 with I-393 in Concord is a full cloverleaf.
In ME, I-95 SB to I-295 SB in Gardiner is a higher speed connection, which used to be I-95 exiting from itself again. The southern 95/295 jct would be high speed if not for the toll booth. I-95/I-395 in Bangor is a cloverleaf and I-95/I-195 in Saco is a trumpet leading to/from a toll booth, so no high speed there either.
In CT, the newly rebuilt I-91/I-95 interchange in New Haven has "higher speed" connections. I'm not sure their posted speed, but 95NB->91NB and 91SB->95SB may be 50 MPH. Same goes for the I-95/I-395 interchange in East Lyme.
In GA:
I-95 NB to I-16 WB
I-95 SB to I-16 EB
I-16 WB to I-95 SB
I-16 EB to I-95 NB
Same arraingement for I-95 to I-20 and I-26 in SC, I-95 to I-74 in NC.
I-95 to I-40 is better, though I-40 to I-95 is really tight WB to SB and EB to NB.
Are there advisory speeds posted on the ramps at the I-87/I-95 interchange?
Slow ramp I use regularly: Eastbound I-66 to the southbound I-495 express lanes. You exit to the left and then the ramp splits to serve both sides of the Beltway. To go south, you essentially go around a U-turn ramp at about 15—20 mph.
Quote from: Revive 755 on June 10, 2017, 10:36:22 AM
Quote from: SteveG1988 on June 09, 2017, 08:57:10 AM
I55 to I55 in St Louis MO. Tight Ramps, 15mph
Assuming the advisory speed has not been reduced since the last time the Streetview van or I was through there, those are 20 mph ramps (when not at a stop due to congestion). Streetview of advance sign for northbound I-55 (https://www.google.com/maps/@38.6153884,-90.1929839,3a,75y,97.33h,90t/data=!3m6!1e1!3m4!1s1PDfkJfUasIWkmQPHg31Kg!2e0!7i13312!8i6656?hl=en)
Also I-55 NB to I-44 WB a few miles to the south - a nasty 20 mph left side to left side ramp.
I thought it was 15, went through there yesterday, it's 20. Felt like it was lower. Tight connections on 55 in that part of town in general.
I'm guessing any toll/non-toll interchange except for the very new ones with express/cashless lanes, but special mention goes to I-95/I-287 in Edison, NJ. Not only is there a toll plaza, but a very tight circle with confusing layout. Bonus points for ending up back on the Turnpike if you miss the ramp onto 287. The reverse movement (287 to 95) doesn't suffer from this, but is still a 25 MPH single lane ramp to the toll plaza. I imagine it wouldn't be like this had I-95 joined the Turnpike here as planned.
Quote from: SectorZ on June 09, 2017, 08:21:59 AM
All of them in Massachusetts, maybe except for 95/495 in Salisbury.
I-95 south to I-93 north in Canton, also I-93 south to I-95 north in Canton, are not slow speed connections.
Quote from: roadman on June 12, 2017, 12:15:16 PM
Quote from: SectorZ on June 09, 2017, 08:21:59 AM
All of them in Massachusetts, maybe except for 95/495 in Salisbury.
I-95 south to I-93 north in Canton, also I-93 south to I-95 north in Canton, are not slow speed connections.
That's true. Still stuck on thinking it's the same number through with 128, cuz old habits die hard. Though in that case 'getting off 128' to stay on 95 s/b is a pretty high speed connection.
The cloverleaf between I-95 and I-395 in Bangor, Maine has some very tight ramps with low advisory speeds. 395W to 95S is advised for 30 miles per hour, while 95S to 395E is advised for 25.
Down in southern Maine, the trumpet between I-95 (Maine Turnpike) and I-195 in Saco has low advisory speeds. The ramps coming onto and off of the 95 southbound lanes are advised for 30. In addition, going east on I-195 leaving this interchange, you come into a 35 mph speed zone (https://goo.gl/maps/HmDThdDZ5VT2) approaching the toll booth for turnpike bound traffic (there is no toll leaving the turnpike here). At the toll booth, there is actually a traffic signal (https://goo.gl/maps/EaJaCi3QDVz) for a crosswalk between the booths and the parking lot/administration building.
Indiana Toll Road (I-90) at I-65. All of the ramps are long and looping, with posted advisory speeds of 25-35 MPH. They measure as long as a mile. That's a long way to go at those speeds when you're supposed to be on an interstate.
Quote from: theline on June 12, 2017, 11:06:55 PM
Indiana Toll Road (I-90) at I-65. All of the ramps are long and looping, with posted advisory speeds of 25-35 MPH. They measure as long as a mile. That's a long way to go at those speeds when you're supposed to be on an interstate.
If memory serves, that is AFTER they improved them, as the ramps from the Toll Road back to I-65 used an At Grade intersection to enter I-65.
I almost thought you had to go all the way to the I-65 terminus at US 20 to enter the Toll Road, but Google Earth 1998 imagery shows there is still a ramp complex directly from I-65 to the Toll Road ramps, even if it did involve an At Grade intersection
I-64 WB to I-95 SB is basically a left turn from a one way street to a ramp...
https://goo.gl/maps/Po1x7vvwDLU2
Quote from: SectorZ on June 12, 2017, 05:26:16 PM
Quote from: roadman on June 12, 2017, 12:15:16 PM
Quote from: SectorZ on June 09, 2017, 08:21:59 AM
All of them in Massachusetts, maybe except for 95/495 in Salisbury.
I-95 south to I-93 north in Canton, also I-93 south to I-95 north in Canton, are not slow speed connections.
That's true. Still stuck on thinking it's the same number through with 128, cuz old habits die hard. Though in that case 'getting off 128' to stay on 95 s/b is a pretty high speed connection.
US 1 runs
through the 95 South-93 North/93 South-95 North hand-off in Canton and has done such since 1989-90.
Quote from: plain on June 13, 2017, 12:24:13 AM
I-64 WB to I-95 SB is basically a left turn from a one way street to a ramp...
https://goo.gl/maps/Po1x7vvwDLU2
That's kind of impressive actually...
One of more recent vintage is the ramp from I-74 East to I-73 North in Randleman, NC. Originally designed as a flyover, cost constraints led to building a sharp cloverleaf design instead and the need to install this sign beforehand, courtesy of Adam Prince: (https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.malmeroads.net%2Fi7374nc%2Fi74seg7ap5.jpg&hash=6103a706331970e50ce9237954db8035433c6603)
Quote from: intelati49 on June 13, 2017, 11:04:38 AM
Quote from: plain on June 13, 2017, 12:24:13 AM
I-64 WB to I-95 SB is basically a left turn from a one way street to a ramp...
https://goo.gl/maps/Po1x7vvwDLU2
That's kind of impressive actually...
Yeah I've always thought this was an interesting ramp myself, but you definitely wouldn't want to take it when going anything over 25 MPH
Quote from: shadyjay on June 10, 2017, 07:51:42 PM
In CT, the newly rebuilt I-91/I-95 interchange in New Haven has "higher speed" connections. I'm not sure their posted speed, but 95NB->91NB and 91SB->95SB may be 50 MPH. Same goes for the I-95/I-395 interchange in East Lyme.
and I-84 to I-291 and I-84 to I-384 and I-291 to I-384. high speed.
Althought I with CT would have more prominent signing for tight ramps. I-95 to CT-8/CT-25 come to mind. One small sign before the ramp NB. It's almost 360 degree turn.
On the ramp you go down, then up over the highway then back down again.
https://www.google.com/maps/place/Bridgeport,+CT/@41.1709884,-73.192739,17.21z/data=!4m5!3m4!1s0x89e8092a96783719:0xdf8bfca7094fcece!8m2!3d41.1865478!4d-73.1951767
What about I-83 South in Harrisburg, PA? It, and I-283, both get merely a SINGLE LANE at their interchange:
https://www.google.com/maps/@40.254017,-76.8115827,3a,75y,222.58h,82.22t/data=!3m7!1e1!3m5!1siECfCXOIY9wYOhDJAA5ccg!2e0!6s%2F%2Fgeo0.ggpht.com%2Fcbk%3Fpanoid%3DiECfCXOIY9wYOhDJAA5ccg%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D44.66856%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656
Southbound 83 gets an advisory speed of 40 here:
https://www.google.com/maps/@40.2536213,-76.8120727,3a,75y,270.2h,80.52t/data=!3m6!1e1!3m4!1spbPksMQFT5zsLKa3qXVDng!2e0!7i13312!8i6656
Then there's I-84 through Hartford, CT. What a mess. Speed limit 40, if memory serves.
Quote from: tckma on June 13, 2017, 06:08:32 PM
Then there's I-84 through Hartford, CT. What a mess. Speed limit 40, if memory serves.
Used to be. They finally got with the times and raised it to 50 MPH
I'm surprized, no mention of SB 75 to NB 85 in GA, which also has really strange markings. Do they make noise when you run them over?
Quote from: roadguy2 on June 09, 2017, 11:13:13 PM
Quote from: cpzilliacus on June 09, 2017, 08:19:24 PM
Any freeway-freeway interchange in Los Angeles County or Orange County in California that features a ramp meter on the ramp (yes, these are pretty common in the Southland). Here's (https://www.google.com/maps/@33.9316915,-118.3609529,3a,75y,71.71h,75.77t/data=!3m6!1e1!3m4!1sVTKI5490AdINqyyLEXSilg!2e0!7i13312!8i6656) an example on a ramp leaving the impressive stack interchange at the junction of I-405 and I-105 (traffic from I-405 southbound to I-105 eastbound) near LAX.
Here's (https://www.google.com/maps/@33.9285858,-118.3682353,3a,75y,3.13h,75.46t/data=!3m6!1e1!3m4!1sda5as4A3oEyiRjFL9OFYcw!2e0!7i13312!8i6656) a view of the stack from the northbound lanes of I-405.
I have never heard of ramp meters on freeway-freeway interchanges. Is there any other place besides south CA that has them on these?
The SR-168/SR-41 interchange in Fresno uses them, but only for ramps going to SR-41.
Aerial: https://www.google.com/maps/@36.755279,-119.775721,16z/data=!3m1!1e3
Street View: https://www.google.com/maps/place/Yosemite+Fwy+%26+CA-41+%26+CA-180,+Fresno,+CA+93701/@36.7527584,-119.7769961,3a,47.7y,142.06h,89.64t/data=!3m4!1e1!3m2!1sv7ocvAWUKFUhPKgID_1S9A!2e0!4m2!3m1!1s0x80945e0591f18a77:0xdd1e4878f438d08b
From I-87 south to I-90 west in Albany requires a 25 mph exit. So does staying on I-87 south.
As a Clevelander/Columbus resident now:
670 to 23 SB (4th Street/Convention Center) is always slow.
Here's a weird one:
71/80/42; back in the day the crossover bridge from the two trumpets was the actual part of the interchange! Before they built 71.
They got rid of the third trumpet and made it a Park and Ride, which is not as awesome as having a true triple trumpet in CLE. The one in Wilkes-Barre is weird and cool though.
I saw on Kurumi back in the '90s about the bump trumpet interchange that was used in Vermont (two adjacent interstates). They should have done that for 80S (cough), erm. 76, and the Ohio Turnpike in North Jackson.
I-83 to I-76: Double Trumpet
I-76 to I-79: Double Trumpet
I-76 to I-80: Double Trumpet to stay on each, straight through if you're switching
I-99 to I-80: lol
I-376 to I-76: Double Trumpet
I-76 to I-95: pretty tight
I-295 at I-76: under construction, but 35mph originally
I-84 at I-87: better than it used to be, still double trumpet
I-87 at I-95: aaaaaaaaaaaaaaaaaaagggghhhhh
Nexus 6P
I-76 to I-70 is so slow it has a stoplight. :bigass:
I-87 at I-90, otherwise known as, what to do when NIMBYism prevents planned buildout of Interstate Highways...
https://www.google.com/maps/place/Albany,+NY/@42.6991125,-73.8521245,15.25z/data=!4m5!3m4!1s0x89de0a34cc4ffb4b:0xe1a16312a0e728c4!8m2!3d42.6525793!4d-73.7562317
I-295 NB to I-10 WB, 25 MPH tight curve, god help you if a truck's in front of you. This needed a flyover yesterday.
Non-cloverleaf example: Most of the interstate-to-interstate interchanges in the KC Downtown Loop. Very tight quarters and low speeds on the main highways to begin with (mostly at 40) means you might have a really tight flyover ramp signed for 30 or so MPH.
In OKC (not a loop ramp):
- I44 NB to I240 EB
- I40 both EB and WB at the Fort Smith junction. Even after the rebuild to eliminate the weaving, the main I40 lanes cannot be taken safely over about 50 MPH.
- I44 WB at the Turner Turnpike western end.
I-93 the parkway section in New Hampshire has to have the narrowest ramps for an interstate.
https://www.youtube.com/watch?v=Vu2_XIr4M_M
Quote from: Jordanes on June 03, 2017, 10:10:06 PM
What interstate to interstate connections are not full expressway-grade? I don't mean things like Breezewood, I mean more like just slow-speed connections, or with weird exits as part of it? The one which comes to mind to me is I-64 east to I-564 east, or the reverse of I-564 west to I-64 west. It's rather slow-speed, and there is an exit to Granby Street sandwiched in there, too. What other examples exist?
I believe that the NB I-580 to WB I-80 connector in Reno is advised down to 20 MPH. They may have fixed that as part of the upgrade, but last I was there, the upgrade was apparently done and the advisory was unchanged. IIRC, the WB I-80 to SB I-680 in Cordelia, CA is advised down to 25 or so. I am not sure that all of the I-580/I-880 connectors in Alameda County, CA have high speed ramps. If not, it would be usual to advise them down to no higher than 40 MPH. Ditto for I-280/I-380 in San Mateo County.
Unsigned WB I-305 also has a slow connection onto SB I-5 in Sacramento.
The northern end of the overlap between I-83 and I-695 near Towson, MD was originally a tight trumpet interchange, later rebuilt into a semi-directional T. The rebuild resulted in I-83 north following a very tight ramp with a sharp curve that bends to pass beneath I-695 and then bends again to merge with the ramp from I-695 west. The walls along the outer edge of the Raman show lots of scars and scuffs from vehicles taking that ramp too quickly.
Quote from: bing101 on July 10, 2017, 12:50:03 AM
I-93 the parkway section in New Hampshire has to have the narrowest ramps for an interstate.
For many years, up to I think about 2006, this portion was signed "TO I-93" and had a separate set of exit numbers (1, 2, 3) that were out of sequence from the rest of NH I-93, because the Franconia Notch Parkway was not built to Interstate standards -- the surrounding environment would have been damaged too much.
It was grandfathered in, they re-signed it as I-93, and renumbered the exits so that they are in sequence.
I don't remember if the exit numbers were changed before or after I moved out of New England, but to me, it seems like a recent change. (Then again, so does PA's conversion to milepost-based exit numbers, which happened almost 15 years ago now. At least it still seems weird to me to see milepost-based exit numbers on I-80, I-380, and the northern part of I-81, since I used to take those to get to college... Down near where I live now, the milepost-based numbers seem normal.)
I-70 and I-81 in Hagerstown, MD always takes ages to get through. Between construction, traffic, and the design is awful as well.
Quote from: cpzilliacus on June 10, 2017, 12:10:18 AM
Quote from: roadguy2 on June 09, 2017, 11:13:13 PM
Quote from: cpzilliacus on June 09, 2017, 08:19:24 PM
Any freeway-freeway interchange in Los Angeles County or Orange County in California that features a ramp meter on the ramp (yes, these are pretty common in the Southland). Here's (https://www.google.com/maps/@33.9316915,-118.3609529,3a,75y,71.71h,75.77t/data=!3m6!1e1!3m4!1sVTKI5490AdINqyyLEXSilg!2e0!7i13312!8i6656) an example on a ramp leaving the impressive stack interchange at the junction of I-405 and I-105 (traffic from I-405 southbound to I-105 eastbound) near LAX.
Here's (https://www.google.com/maps/@33.9285858,-118.3682353,3a,75y,3.13h,75.46t/data=!3m6!1e1!3m4!1sda5as4A3oEyiRjFL9OFYcw!2e0!7i13312!8i6656) a view of the stack from the northbound lanes of I-405.
I have never heard of ramp meters on freeway-freeway interchanges. Is there any other place besides south CA that has them on these?
I have not seen them elsewhere with my own eyes, but I have been told that they do exist in other places.
Certainly some of the CASR-85 to CASR-17 movements.
Just did this one today. I-275 north to I-74/US 52 west in Ohio. Signed for 25 mph and agonizingly slow when a truck in front of you follows the advisory speed.
Since many of the cited examples are cloverleaf types, I've got a question that someone out there might be able to answer: Are more recent examples of cloverleaves constructed to higher-speed standards; as an example I'd point to the I-55/69/(nascent 269) interchange at Hernando, MS, as well as the under-construction I-22/I-269 interchange several miles to the east. Do the advisory speeds for the loops exceed 25 mph for either facility? One would think that even for a cloverleaf type, any newer and more rural examples of freeway-to-freeway types would occupy enough land to expand the radius of these loops to accommodate 30-35 mph at the least. Any thoughts?
Quote from: SFalcon71 on August 04, 2017, 11:49:04 PM
I-70 and I-81 in Hagerstown, MD always takes ages to get through. Between construction, traffic, and the design is awful as well.
Meh, it's a standard cloverleaf, and besides, no one in Annapolis gives a crap about anything west of Frederick. ;)
I've never had a problem with it, but I don't get out to western MD much.
Quote from: tckma on August 07, 2017, 11:53:17 AM
Quote from: SFalcon71 on August 04, 2017, 11:49:04 PM
I-70 and I-81 in Hagerstown, MD always takes ages to get through. Between construction, traffic, and the design is awful as well.
Meh, it's a standard cloverleaf, and besides, no one in Annapolis gives a crap about anything west of Frederick. ;)
You got that right!
Not interstate to interstate but both high-speed limited access none the less.
i4 junction with Florida turnpike and i4 junction with SR408.. The classic toll road double trumpets.
The 408 junction backs up really badly. But no longer a toll booth
At the turnpike the sunpass lanes say you have to go 25mph.. Very few go that slow
Both are being reconstructed with the i4 ultimimate project with AET.
LGMS428
Interstate 10 at Interstate 20 in Texas. The W/B I-20 to E/B I-10 movement requires merging across two lanes followed by a 35 MPH U-turn. One can see from the satellite view that the movement was once on a tighter radius.
https://goo.gl/maps/BRwN4gzauXR2
This exit was particularly nasty before they rebuilt it, especially when there's a truck in front.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.speedcam.uk%2Fd70%2F7079.jpg&hash=9026e8bf1ef5d4097e2acebf2fbf7f4959ed6bbf)
Quote from: sparker on August 06, 2017, 10:24:56 PM
Since many of the cited examples are cloverleaf types, I've got a question that someone out there might be able to answer: Are more recent examples of cloverleaves constructed to higher-speed standards; as an example I'd point to the I-55/69/(nascent 269) interchange at Hernando, MS, as well as the under-construction I-22/I-269 interchange several miles to the east. Do the advisory speeds for the loops exceed 25 mph for either facility? One would think that even for a cloverleaf type, any newer and more rural examples of freeway-to-freeway types would occupy enough land to expand the radius of these loops to accommodate 30-35 mph at the least. Any thoughts?
1. Yes. I do believe the newer clover in Joplin is signed as 35MPH. In your example the -55 clover is signed as 30mph
2. I know for a fact that the I-22 interchange includes full (NB/SB/EB/WB) C/D roads, which migrates the issues of the merging into the slow speed exits. I'm not as worried about that one.
Quote from: Truvelo on August 16, 2017, 04:32:52 AM
This exit was particularly nasty before they rebuilt it, especially when there's a truck in front.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.speedcam.uk%2Fd70%2F7079.jpg&hash=9026e8bf1ef5d4097e2acebf2fbf7f4959ed6bbf)
What was the old interchange like? Was it a double trumpet or something else?
I-75 to I-75 in Detroit. In the NE corner of downtown Detroit I-75 switches from the Fisher Freeway to the Chrysler Freeway and vice versa in the other direction. I-375 is a continuation of the Chrysler Freeway but in order to switch from the Fisher to the Chrysler or the other way around you have to go through a 25 mph exit ramp to stay on I-75.
California examples:
There's the ramp from US 101 north to I-10 east at the San Bernardino Split near downtown Los Angeles, which was an Interstate-Interstate junction from 1965-1968 (the unsigned I-105 with unsigned I-110).
Unsigned I-305 (US 50, former I-80) at I-5 in Sacramento has 30 MPH ramps:
https://www.google.com/maps/@38.569354,-121.5139527,3a,37.9y,133.21h,87.22t/data=!3m6!1e1!3m4!1sPPeleIJVDa4YOcd7qA6t0A!2e0!7i13312!8i6656
This might be the slowest one I've seen so far: 20 MPH ramp from I-10 west to I-710 south near Monterey Park
https://www.google.com/maps/@34.0614933,-118.1654579,3a,75y,287.23h,87.28t/data=!3m7!1e1!3m5!1sWTlrXuviFEVqmcqPA5jT-Q!2e0!6s%2F%2Fgeo2.ggpht.com%2Fcbk%3Fpanoid%3DWTlrXuviFEVqmcqPA5jT-Q%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D55.206158%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656
Another 20 MPH example: I-8 east to I-15 north, San Diego
https://www.google.com/maps/@32.7783864,-117.11298,3a,40y,102.04h,91.56t/data=!3m7!1e1!3m5!1sDN3b3GLCTz_X32Js4G73_A!2e0!6s%2F%2Fgeo3.ggpht.com%2Fcbk%3Fpanoid%3DDN3b3GLCTz_X32Js4G73_A%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D326.33795%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656
I-80 west to I-780 east in Vallejo, 30 MPH cloverleaf ramp
https://www.google.com/maps/@38.0914952,-122.230775,3a,75y,191.86h,90.2t/data=!3m7!1e1!3m5!1si-o7q1IL4bUAWbDqiiJcbw!2e0!6s%2F%2Fgeo1.ggpht.com%2Fcbk%3Fpanoid%3Di-o7q1IL4bUAWbDqiiJcbw%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D106.47363%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656
I-880 south to I-280 south in San Jose, 25 MPH cloverleaf
https://www.google.com/maps/@37.3170082,-121.9406323,3a,75y,189.66h,87.31t/data=!3m7!1e1!3m5!1sV0_pD9sf8GZThruv3IRXpw!2e0!6s%2F%2Fgeo3.ggpht.com%2Fcbk%3Fpanoid%3DV0_pD9sf8GZThruv3IRXpw%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D0.25192702%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656
I-110 north to I-105 west in Los Angeles, 25 MPH cloverleaf
https://www.google.com/maps/@33.929384,-118.2798765,3a,75y,1.88h,89.04t/data=!3m7!1e1!3m5!1sar0nC9raMiiKW4gvJNERsg!2e0!6s%2F%2Fgeo3.ggpht.com%2Fcbk%3Fpanoid%3Dar0nC9raMiiKW4gvJNERsg%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D152.10274%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656
I-405 south to I-110 north:
https://www.google.com/maps/@33.8558932,-118.2842789,3a,39.2y,127.64h,88.3t/data=!3m7!1e1!3m5!1s8gyOH2Lwwa6Mwt3xX1GrnA!2e0!6s%2F%2Fgeo0.ggpht.com%2Fcbk%3Fpanoid%3D8gyOH2Lwwa6Mwt3xX1GrnA%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D114.227715%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656
I-710 south to I-405 south
https://www.google.com/maps/@33.8260196,-118.2076612,3a,75y,175.18h,90t/data=!3m6!1e1!3m4!1suothkLnrilxPYGONaucr2Q!2e0!7i13312!8i6656
I-215 north to I-10 west, Colton
https://www.google.com/maps/@34.0647744,-117.2959124,3a,75y,27.52h,89.37t/data=!3m7!1e1!3m5!1sswKXihtbd6VEqYVjrykZSA!2e0!6s%2F%2Fgeo3.ggpht.com%2Fcbk%3Fpanoid%3DswKXihtbd6VEqYVjrykZSA%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D110.881714%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656
I-8 west to I-5 south, San Diego
https://www.google.com/maps/@32.7580144,-117.2043389,3a,75y,214.53h,88.18t/data=!3m7!1e1!3m5!1soZ5mNBrYJiGAvAIMg1YwOQ!2e0!6s%2F%2Fgeo0.ggpht.com%2Fcbk%3Fpanoid%3DoZ5mNBrYJiGAvAIMg1YwOQ%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D124.212875%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656
Quote from: jecht on October 24, 2017, 05:15:06 PM
Quote from: Truvelo on August 16, 2017, 04:32:52 AM
This exit was particularly nasty before they rebuilt it, especially when there's a truck in front.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.speedcam.uk%2Fd70%2F7079.jpg&hash=9026e8bf1ef5d4097e2acebf2fbf7f4959ed6bbf)
What was the old interchange like? Was it a double trumpet or something else?
No, it was a trumpet that had issues only because idiot drivers couldn't read the signs and drove too fast on the loop ramp that carried I-79 north. And because idiot drivers couldn't or didn't read and obey the signs, PennDOT wasted millions to rebuild the exit.
Quote from: hbelkins on October 25, 2017, 10:39:29 AM
Quote from: jecht on October 24, 2017, 05:15:06 PM
Quote from: Truvelo on August 16, 2017, 04:32:52 AM
This exit was particularly nasty before they rebuilt it, especially when there's a truck in front.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.speedcam.uk%2Fd70%2F7079.jpg&hash=9026e8bf1ef5d4097e2acebf2fbf7f4959ed6bbf)
What was the old interchange like? Was it a double trumpet or something else?
No, it was a trumpet that had issues only because idiot drivers couldn't read the signs and drove too fast on the loop ramp that carried I-79 north. And because idiot drivers couldn't or didn't read and obey the signs, PennDOT wasted millions to rebuild the exit.
As someone who drives through that interchange several times a month, it needed rebuilt. The interchange is at the bottom of a hill. For I-79 NB, you'd come down a mile-long grade, go through a 25mph loop, and then have to merge in to I-70 WB going uphill with a short merge lane. Good luck if you got stuck behind a truck. The new flyover ramp has a 40mph advisory speed but can easily be taken at 55 in a car.
I don't think anything is in the works, but I'd like to see something done about the ramp from I-70 EB to I-79 SB. The ramp comes downhill from I-70 (you can do 35-40 on it in a car) then starts a mile-long climb uphill to US 40. You'll get a line of trucks backed up going uphill. A higher speed ramp that flew over Vance Station Road to minimize the grade would be helpful.
The (western end of) I-76 to I-71 interchange used to be pretty slow; what was up with a double trumpet when neither is a toll road? However the freeway-to-freeway movements have since been replaced with more sensible ramps. Trumpet remnants are still in place for the fourth direction of at-grade US-224.
While not nearly as problematic as its infamous counterpart, I-70 EB at New Stanton is kind of slow. It's a double trumpet, with a kind of tight loop ramp leading onto the PA Turnpike itself. How feasible would a direct EB connector ramp be? It would have to incline and curve upward over a railroad and the Sewickley Creek. The WB route isn't as bad, as it's pretty much just one elongated loop -- plus the recently-completed improvements at the New Stanton exit off "free" I-70 might help get traffic get up to speed quicker.
Quote from: lepidopteran on October 25, 2017, 08:41:28 PM
While not nearly as problematic as its infamous counterpart, I-70 EB at New Stanton is kind of slow. It's a double trumpet, with a kind of tight loop ramp leading onto the PA Turnpike itself. How feasible would a direct EB connector ramp be? It would have to incline and curve upward over a railroad and the Sewickley Creek. The WB route isn't as bad, as it's pretty much just one elongated loop -- plus the recently-completed improvements at the New Stanton exit off I-70 might help get traffic get up to speed quicker.
Stuff like this will be a lot more feasible once the Pennsylvania Turnpike transitions to all-electronic tolling.
I-95 NB to I-85. Very tight ramp.
But who takes that ramp anyway? It's effectively a U-Turn. Whoops, I've decided I don't like Virginia... I'm fixin' ta head back to No'th Ca'lina now.
I'd imagine it almost makes more sense to exit onto Petersburg's surface streets and get onto 85 at Squirrel Level Road or something.
(Wrote this post from memory without consulting Google Maps.)
Quote from: Takumi on October 28, 2017, 10:24:18 AM
I-95 NB to I-85. Very tight ramp.
Quote from: tckma on October 28, 2017, 09:12:41 PM
But who takes that ramp anyway? It's effectively a U-Turn. Whoops, I've decided I don't like Virginia... I'm fixin' ta head back to No'th Ca'lina now.
I'd imagine it almost makes more sense to exit onto Petersburg's surface streets and get onto 85 at Squirrel Level Road or something.
(Wrote this post from memory without consulting Google Maps.)
Quote from: Takumi on October 28, 2017, 10:24:18 AM
I-95 NB to I-85. Very tight ramp.
It's the movement for US 460 westbound, for one thing. So US 460 traffic. Also, having formerly worked in Petersburg and being familiar with its streets, driving through town and cutting over to Squirrel Level is slooooooow.
Quote from: Takumi on October 28, 2017, 10:35:04 PM
Quote from: tckma on October 28, 2017, 09:12:41 PM
I-95 NB to I-85. Very tight ramp.
It's the movement for US 460 westbound, for one thing. So US 460 traffic. Also, having formerly worked in Petersburg and being familiar with its streets, driving through town and cutting over to Squirrel Level is slooooooow.
The loop ramp is negotiable at 35 mph, which is probably adequate. Nevertheless a recent VDOT study considers the building of a semi-directional ramp to replace that loop, probably with a 50 mph or higher design speed.
No doubt. It's large trucks that have issues there. Seen a few tip-overs in my time driving past the ramp going home from work. I'm sure it's continued since I no longer work in Petersburg.
I-75 NB to I-69 WB in Flint
Prior to December 1982, the Oak Park interchange in SE Sacramento (now US 50/CA 99/unsigned CA 51/Biz 80), one of the few "turbine" interchanges in the state, featured a EB I-80 continuation ramp signed at 35mph (compass EB>NB). The rerouting of I-80 on the former I-880 around the north side of the city eliminated that slow-speed transition (although technically it's still on the route of an Interstate -- the on-paper-only I-305!).
Quote from: plain on June 13, 2017, 12:24:13 AM
I-64 WB to I-95 SB is basically a left turn from a one way street to a ramp...
https://goo.gl/maps/Po1x7vvwDLU2
I forgot about this one. This is the type I meant with the original post -- not necessarily a cloverleaf, and with some other weird exit crammed in there, as well.
Quote from: jecht on June 22, 2017, 11:05:51 PM
Here's a weird one:
71/80/42; back in the day the crossover bridge from the two trumpets was the actual part of the interchange! Before they built 71.
They got rid of the third trumpet and made it a Park and Ride, which is not as awesome as having a true triple trumpet in CLE. The one in Wilkes-Barre is weird and cool though.
What in Wilkes-Barre are you referencing? I am a native, and am currently home for Christmas. I could check it out while here.
Oh, are you talking about the end of the turnpike where it connects to 81 in Clarks Summit? That's not Wilkes-Barre. ;-)
The I-196/US-131 (unsigned I-296 north of this interchange) interchange is very slow. I think all of the ramps have advisory speeds of 30mph or below and have extremely tight turns. I took WB 196 to NB 131/296 (I was stuck in the left lane where 96 and 196 split) on Friday and I had to slow way down on that ramp (considering that 196 is 65 and 131 is 70 through there). Compare to several other ramps in the Grand Rapids area that can be taken at or near highway speeds (EB 96 to SB 131, NB 131 to WB 96, most if not all ramps at either end of M-6)
North of Council Bluffs, IA, I-29 full clover leaf with I-680 to Mormon Bridge and Omaha. Also has an at grade RR crossing just east of the cloverleaf, although those tracks are rarely used.
Sadly obsolete interchange . . . .
Quote from: Jordanes on December 24, 2017, 06:26:48 AM
Quote from: plain on June 13, 2017, 12:24:13 AM
I-64 WB to I-95 SB is basically a left turn from a one way street to a ramp...
https://goo.gl/maps/Po1x7vvwDLU2
I forgot about this one. This is the type I meant with the original post -- not necessarily a cloverleaf, and with some other weird exit crammed in there, as well.
That is what it was when the Richmond-Petersburg Turnpike (RPT) was originally built, a left turn from 5th Street, and the ramp had a toll plaza.
I-64 had not had a final location determined when the RPT was built, and the I-64 interchange was opened 10 years later, and the WB local exit from I-64 took over 5th Street and that ramp is exclusively from I-64 until that SB ramp branches off, also 5th Street was severed into 2 sections (seen on the link that was posted above). The RPT became fully toll-free in 1992.
There are studies underway to improve I-64/I-95 and one of the proposals is to build a semi-directional flyover ramp to replace the movement for WB I-64 to SB I-95.
I'm surprised I-80/I-84 Utah interchange hasn't been mentioned. I don't remember the facts on it 100% but I thought I saw it being 25 mph.
In my state Oregon:
One of the only good things we do traffic wise except with one exception:
I-5/I-105 is a full cloverfleef variant.
Quote from: Hurricane Rex on December 25, 2017, 02:24:46 AM
I'm surprised I-80/I-84 Utah interchange hasn't been mentioned. I don't remember the facts on it 100% but I thought I saw it being 25 mph.
The 80 east to 84 west ramp is indeed signed with an advisory 25 mph. Also, the 84 to 80 west ramp is 35, and 84 to 80 east is 45.
I 540 NB to I 40 WB in Van Buren, AR has a 25 MPH advisory speed.
LGL64VL