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Interstate to Interstate Slow-speed Exits

Started by Jordanes, June 03, 2017, 10:10:06 PM

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ColossalBlocks

I-255 to I-55 Southbound is pretty slow.
https://goo.gl/maps/2TAMgByk2i42

Advised speed of 25 miles per hour.
I am inactive for a while now my dudes. Good associating with y'all.

US Highways: 36, 49, 61, 412.

Interstates: 22, 24, 44, 55, 57, 59, 72, 74 (West).


shadyjay

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. 

slorydn1

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.

Please Note: All posts represent my personal opinions and do not represent those of any governmental agency, non-governmental agency, quasi-governmental agency or wanna be governmental agency

Counties: Counties Visited

MikeTheActuary

Are there advisory speeds posted on the ramps at the I-87/I-95 interchange?

1995hoo

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.
"You know, you never have a guaranteed spot until you have a spot guaranteed."
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commenting on the Capitals clinching a playoff spot.

"That sounded stupid, didn't it?"
—Kolzig, to the same reporter a few seconds later.

SteveG1988

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

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.
Roads Clinched

I55,I82,I84(E&W)I88(W),I87(N),I81,I64,I74(W),I72,I57,I24,I65,I59,I12,I71,I77,I76(E&W),I70,I79,I85,I86(W),I27,I16,I97,I96,I43,I41,

bzakharin

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.

roadman

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.
"And ninety-five is the route you were on.  It was not the speed limit sign."  - Jim Croce (from Speedball Tucker)

"My life has been a tapestry
Of years of roads and highway signs" (with apologies to Carole King and Tom Rush)

SectorZ

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.

Ian

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 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 for a crosswalk between the booths and the parking lot/administration building.
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theline

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.

ilpt4u

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

plain

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




Newark born, Richmond bred

PHLBOS

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.
GPS does NOT equal GOD

intelati49

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...

bob7374

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:

plain

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
Newark born, Richmond bred

Mergingtraffic

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
I only take pics of good looking signs. Long live non-reflective button copy!
MergingTraffic https://www.flickr.com/photos/98731835@N05/

tckma


jp the roadgeek

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
Interstates I've clinched: 97, 290 (MA), 291 (CT), 291 (MA), 293, 295 (DE-NJ-PA), 295 (RI-MA), 384, 391, 395 (CT-MA), 395 (MD), 495 (DE), 610 (LA), 684, 691, 695 (MD), 695 (NY), 795 (MD)

MCRoads

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?
I build roads on Minecraft. Like, really good roads.
Interstates traveled:
4/5/10*/11**/12**/15/25*/29*/35(E/W[TX])/40*/44**/49(LA**)/55*/64**/65/66*/70°/71*76(PA*,CO*)/78*°/80*/95°/99(PA**,NY**)

*/** indicates a terminus/termini being traveled
° Indicates a gap (I.E Breezwood, PA.)

more room plz

ukfan758

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 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 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

Sam

From I-87 south to I-90 west in Albany requires a 25 mph exit. So does staying on I-87 south.

jecht

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.

sbeaver44

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




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