Dangerous interchanges

[tolbs17]

Laurinburg, North Carolina
https://maps.app.goo.gl/2Ed2oonHP1yTegzE6

Interchanges are way too close. Not sure what they were thinking when they built this highway.

2711 US-401
https://maps.app.goo.gl/td33WfXN4EBitpDq7

This one is substandard as of today, and the reason why I think it was built that way is because the freeway ended there. Now it needs to be rebuilt completely or have some tweaking. Its a death trap with no signals.

[skluth]

I agree both are close. They at least have extended ramp lanes that allow traffic to merge easily without interfering with the main traffic flow. Separated C/D lanes would be better, but I've seen far worse interchanges. Both are far better than this onramp in St Louis which I used daily going home before I retired. It's almost as bad as this nearby steep uphill onramp which is frequently used by trucks which merge directly into traffic. Both ramps would be greatly improved with an extended on/off ramps between Gasconade and Potomac/President, especially because of the heavy truck traffic using all four ramps.

While traffic merging and weaving at those onramps were inconvenient and usually just resulted in backed up traffic, my offramp to work ended in an even more dangerous intersection. Notice the semi-hidden bike lane along with traffic turning right from Broadway onto Utah conflicting with traffic coming off the ramp both going north on Broadway and turning left onto Utah.

Suburban and rural close exits are usually just inconvenient but tend to have the mitigating improvements like in your example. Urban interchanges are the worst when it comes to close ramps with few improvements to reduce weaving.

[Max Rockatansky]

I-5 at CA 152/CA 33 given the overall small size, little space between the Exits/Approaches and tight turns on the ramps:

https://flic.kr/p/2kXMEyQ

[tolbs17]

This one is very dangerous with no deceleration lane from southbound I-95 to exit. Construction was expected to start in 2022, but it has been delayed to 2026 i think...

https://www.google.com/maps/@35.4572642,-78.3898019,766m/data=!3m1!1e3

[Max Rockatansky]

More Raleigh, AKA the center of the universe. 

[GaryV]

What's that lane set off by short lines that starts at the bridge and ends at the gore point?

[SeriesE]

The entire CA-110 north of US-101 was made for this thread. Many of the interchanges have no acceleration or deceleration lanes.

Honorable mentions in California:
East Los Angeles Interchange (I-5/I-10/US-101/CA-60) due to the confusing layout
US-101/I-880 in San Jose - tons of weaving

[SeriesE]

I-5 at CA 152/CA 33 given the overall small size, little space between the Exits/Approaches and tight turns on the ramps:

https://flic.kr/p/2kXMEyQ

two of the four loop ramps have alternatives so the problem is not as bad.

CA-152 E to I-5 N can be avoided by using CA-33 N/Santa Nella Rd
CA-152 W to I-5 S can use CA-165 S to I-5 S instead

[tolbs17]

What's that lane set off by short lines that starts at the bridge and ends at the gore point?

What question are you referring to?

[jmd41280]

My favorite...I-376 exit 74 in Pittsburgh. For those that are unfamiliar, the ramp onto I-376 east ends at a stop sign that leads onto...wait for it...the exit lane from I-376 east. Consequently, one must immediately cut across that lane to get onto I-376.

Not sure what the designers of that interchange were thinking (or perhaps using) whenever they designed it.

[Max Rockatansky]

I-5 at CA 152/CA 33 given the overall small size, little space between the Exits/Approaches and tight turns on the ramps:

https://flic.kr/p/2kXMEyQ

two of the four loop ramps have alternatives so the problem is not as bad.

CA-152 E to I-5 N can be avoided by using CA-33 N/Santa Nella Rd
CA-152 W to I-5 S can use CA-165 S to I-5 S instead

A turn onto CA 152/33 in downtown Los Banos from CA 165 isn't a very sound option for freight vehicles.  It's actually kind of a significant jog mileage wise unlike CA 33 in Santa Nella.

[SeriesE]

I-5 at CA 152/CA 33 given the overall small size, little space between the Exits/Approaches and tight turns on the ramps:

https://flic.kr/p/2kXMEyQ

two of the four loop ramps have alternatives so the problem is not as bad.

CA-152 E to I-5 N can be avoided by using CA-33 N/Santa Nella Rd
CA-152 W to I-5 S can use CA-165 S to I-5 S instead

A turn onto CA 152/33 in downtown Los Banos from CA 165 isn't a very sound option for freight vehicles.  It's actually kind of a significant jog mileage wise unlike CA 33 in Santa Nella.

I'm assuming the traffic will be coming from Los Banos itself since it's the only population center within the CA-152 corridor in the Central Valley.

[Max Rockatansky]

I-5 at CA 152/CA 33 given the overall small size, little space between the Exits/Approaches and tight turns on the ramps:

https://flic.kr/p/2kXMEyQ

two of the four loop ramps have alternatives so the problem is not as bad.

CA-152 E to I-5 N can be avoided by using CA-33 N/Santa Nella Rd
CA-152 W to I-5 S can use CA-165 S to I-5 S instead

A turn onto CA 152/33 in downtown Los Banos from CA 165 isn't a very sound option for freight vehicles.  It's actually kind of a significant jog mileage wise unlike CA 33 in Santa Nella.

I'm assuming the traffic will be coming from Los Banos itself since it's the only population center within the CA-152 corridor in the Central Valley.

There is a lot of transitions happening from CA 152/33 onto I-5 and vice versa.  Don't forget Pacheco Pass (CA 152) is a huge freight corridor for goods to pass over.  The smallish interchange does trucks absolutely no favors and causes many a wreck.

[tolbs17]

More Raleigh, AKA the center of the universe. 

I'm not sure what you mean by Raleigh, but that's in Four Oaks.

[Max Rockatansky]

More Raleigh, AKA the center of the universe. 

I'm not sure what you mean by Raleigh, but that's in Four Oaks.

It's close enough that there is a Raleigh Oaks RV Park right there. 

[23skidoo]

My favorite...I-376 exit 74 in Pittsburgh. For those that are unfamiliar, the ramp onto I-376 east ends at a stop sign that leads onto...wait for it...the exit lane from I-376 east. Consequently, one must immediately cut across that lane to get onto I-376.

Not sure what the designers of that interchange were thinking (or perhaps using) whenever they designed it.

Very strange. A better solution would have been a simple diamond interchange, but no...

[tolbs17]

Poole road at the end of the I-87 split. Short weaving distances. There were plans to convert the Poole road interchange into a folded diamond, but I think those plans are dead for right now at least.

https://www.google.com/maps/@35.7734473,-78.5746021,16z

[sprjus4]

I-5 at CA 152/CA 33 given the overall small size, little space between the Exits/Approaches and tight turns on the ramps:

https://flic.kr/p/2kXMEyQ

two of the four loop ramps have alternatives so the problem is not as bad.

CA-152 E to I-5 N can be avoided by using CA-33 N/Santa Nella Rd
CA-152 W to I-5 S can use CA-165 S to I-5 S instead

A turn onto CA 152/33 in downtown Los Banos from CA 165 isn't a very sound option for freight vehicles.  It's actually kind of a significant jog mileage wise unlike CA 33 in Santa Nella.

I'm assuming the traffic will be coming from Los Banos itself since it's the only population center within the CA-152 corridor in the Central Valley.

There is a lot of transitions happening from CA 152/33 onto I-5 and vice versa.  Don't forget Pacheco Pass (CA 152) is a huge freight corridor for goods to pass over.  The smallish interchange does trucks absolutely no favors and causes many a wreck.

It's also the main corridor between San Jose and I-5.

[jp the roadgeek]

The most deceptively and sudden sharp curve known to man: I-684 North to I-84 East in Brewster, NY

https://www.google.com/maps/@41.3884087,-73.5953416,3a,75y/data=!3m4!1e1!3m2!1sl3NqHSLJuFOb-Y7MAzpm3Q!2e0

[SeriesE]

I-5 at CA 152/CA 33 given the overall small size, little space between the Exits/Approaches and tight turns on the ramps:

https://flic.kr/p/2kXMEyQ

two of the four loop ramps have alternatives so the problem is not as bad.

CA-152 E to I-5 N can be avoided by using CA-33 N/Santa Nella Rd
CA-152 W to I-5 S can use CA-165 S to I-5 S instead

A turn onto CA 152/33 in downtown Los Banos from CA 165 isn't a very sound option for freight vehicles.  It's actually kind of a significant jog mileage wise unlike CA 33 in Santa Nella.

I'm assuming the traffic will be coming from Los Banos itself since it's the only population center within the CA-152 corridor in the Central Valley.

There is a lot of transitions happening from CA 152/33 onto I-5 and vice versa.  Don't forget Pacheco Pass (CA 152) is a huge freight corridor for goods to pass over.  The smallish interchange does trucks absolutely no favors and causes many a wreck.

It's also the main corridor between San Jose and I-5.

I am aware of that. Based on the ramp AADT from 2015, the most used to least used movements are:

• I-5 N to CA-152 W - 4163 (loop)
• CA-152 E to I-5 S - 4121
• CA-152 E to I-5 N - 2737 (loop)
• I-5 S to CA-152 E - 2143 (loop)
• CA-152 W to I-5 N - 1620
• CA-152 W to I-5 S - 1070 (loop)
• I-5 S to CA-152 W - 587
• I-5 N to CA-152 E - 226

[MCRoads]

It is no longer so dangerous now, because the ramp in question was reconstructed, but I-25 NB exit 156 had a very tight 90° curve. All the ramps have pretty bad transitions IMO, but this was by far the worst offender.

Then again, there is this. And this, this, this, and can this even be counted as an interchange?

[Mark68]

I-25 in Denver from about Santa Fe Dr to Colfax.