Interchanges with no stoplights

[webny99]

Most junctions between freeways and surface streets in urban/suburban areas are handled by stoplights.
However, I-490 and NY-31 is one of the busiest interchanges (besides freeway-freeway) in my area, and there are no stoplights at the junction. It functions as a set of T-intersections, with right turn modifications. I would not be surprised if this is the busiest surface street in the nation to cross a freeway without a single stoplight.

Are there any others out there?
(Obviously cloverleafs don't count - let's say six ramps maximum and at least one at-grade intersection to qualify.)
ADDED: Roundabouts have neither left turns nor cross traffic. So they are not at-grade intersections for the purpose of this discussion.

[blue.cable82]

interstate 10 and Rosemead Blvd  in Socal.
LGMS210

[BrianP]

Are roundabouts acceptable or not?  Your post isn't clear.  On one hand you seem like you want just stop signs.  On the other it seems you just don't want stop lights.  So I'm confused.  Because for MD, MD 216 @ US 29 comes to mind.
https://www.google.com/maps/@39.1458431,-76.8999922,16.92z

[tradephoric]

US 301 & I-75 Parclo B4 interchange near Tampa.  US301 is a major 6-lane boulevard and according to FDOT has a link volume of 74,000 just south of the interchange. 

https://www.google.com/maps/@27.9028527,-82.3437491,484m/data=!3m1!1e3

[tradephoric]

^Here is the intersection just south of the US301 & I-75 interchange.  Going SB it has 3 thru lanes, 3 left turn lanes, and a dedicated right turn lane.  It carries a massive amount of traffic.

https://www.google.com/maps/@27.8939873,-82.3380387,121m/data=!3m1!1e3 

[SectorZ]

The closest interchange to me, I-495 and Woburn St (exit 37) in Lowell, MA fits this criteria. 4 ramps, no stoplights, though it does have an unusual ramp off of a side street to get to 495 north.

[kphoger]

Are roundabouts acceptable or not?  Your post isn't clear.  On one hand you seem like you want just stop signs.  On the other it seems you just don't want stop lights.  So I'm confused.  Because for MD, MD 216 @ US 29 comes to mind.
https://www.google.com/maps/@39.1458431,-76.8999922,16.92z

Seems pretty clear to me:

(Obviously cloverleafs don't count - let's say six ramps maximum and at least one at-grade intersection to qualify.)

So a roundabout could be included, but there still has to be an at-grade intersection. Keep in mind the +20K criteria as well.

Well, all roundabouts are at-grade intersections, so any roundabout could be included?

[Rothman]

No left turns in roundabouts?  I must be breaking the law somehow, then when I go counter-clockwise around the circle and out.

[kphoger]

Roundabouts have neither left turns nor cross traffic. So they are not at-grade intersections for the purpose of this discussion.

OK, I get that.  I tend to think of a roundabout as a series of T intersections, but I understand you now.

[tradephoric]

However, I-490 and NY-31 is one of the busiest interchanges (besides freeway-freeway) in my area, and there are no stoplights at the junction. It functions as a set of T-intersections, with right turn modifications. I would not be surprised if this is the busiest surface street in the nation to cross a freeway without a single stoplight.

This is the I-490 and NY-31 interchange in question right? 
https://www.google.com/maps/@43.0788922,-77.4853303,326m/data=!3m1!1e3

NY-31 is a 2-lane road west of the interchange and it's not super surprising that the interchange doesn't have stoplights.  There are plenty of busier interchanges out there without traffic signals (i know of 36 unsignalized Parclo interchanges along 4-lane or 6-lane surface streets that carry much more traffic than NY-31). 

[kphoger]

However, I-490 and NY-31 is one of the busiest interchanges (besides freeway-freeway) in my area, and there are no stoplights at the junction. It functions as a set of T-intersections, with right turn modifications. I would not be surprised if this is the busiest surface street in the nation to cross a freeway without a single stoplight.

This is the I-490 and NY-31 interchange in question right? 
https://www.google.com/maps/@43.0788922,-77.4853303,326m/data=!3m1!1e3

NY-31 is a 2-lane road west of the interchange and it's not super surprising that the interchange doesn't have stoplights.  There are plenty of busier interchanges out there without traffic signals (i know of 36 unsignalized Parclo interchanges along 4-lane or 6-lane surface streets that carry much more traffic than NY-31). 

Thanks for posting this.  I was about to comment likewise, but I just figured I wasn't familiar with the area so I didn't know the scoop.

[BrianP]

The full access question was another that I assumed.  I figured partial interchanges wouldn't be included.

[tradephoric]

Here is an unsignalized SPUI in Illinois...

https://www.google.com/maps/@42.3639101,-87.8287867,101m/data=!3m1!1e3

[tradephoric]

Are you sure there's 36? Care to tell us where they are?

Here is a KMZ file of unsignalized Parclos...
https://www.mediafire.com/file/6vpo98f63r3z5w0/Unsignalized%20Parclos.kmz

Here is a unsignalized Parclo that has dual left-turn lanes entering the freeway which adds some complexity...
https://www.mediafire.com/file/6vpo98f63r3z5w0/Unsignalized%20Parclos.kmz

[kphoger]

https://www.mediafire.com/file/6vpo98f63r3z5w0/Unsignalized%20Parclos.kmz
https://www.mediafire.com/file/6vpo98f63r3z5w0/Unsignalized%20Parclos.kmz

Aren't those two the exact same link?

[tradephoric]

https://www.mediafire.com/file/6vpo98f63r3z5w0/Unsignalized%20Parclos.kmz
https://www.mediafire.com/file/6vpo98f63r3z5w0/Unsignalized%20Parclos.kmz

Aren't those two the exact same link?

Woops!  Here is the correct link to the unsignalized Parclo that has dual left-turn lanes...

https://www.google.com/maps/@34.72793,-86.66928,361m/data=!3m1!1e3

[Max Rockatansky]

The Andytown interchange with the Alligator Alley section of I-75 and US 27 has no traffic signals nor stop lights:

https://www.google.com/maps/@26.1435766,-80.4412922,15z

[jakeroot]

https://www.mediafire.com/file/6vpo98f63r3z5w0/Unsignalized%20Parclos.kmz
https://www.mediafire.com/file/6vpo98f63r3z5w0/Unsignalized%20Parclos.kmz

Aren't those two the exact same link?

Woops!  Here is the correct link to the unsignalized Parclo that has dual left-turn lanes...

https://www.google.com/maps/@34.72793,-86.66928,361m/data=!3m1!1e3

That's the best thing I've ever seen. I didn't think an unsignalized dual left existed anywhere in the US. I know of many double lefts that yield, but they're all signalized.

[BrianP]

The Andytown interchange with the Alligator Alley section of I-75 and US 27 has no traffic signals nor stop lights:

https://www.google.com/maps/@26.1435766,-80.4412922,15z

But it has more than six ramps. And it has no at-grade intersections.

[kphoger]

The Andytown interchange with the Alligator Alley section of I-75 and US 27 has no traffic signals nor stop lights:

https://www.google.com/maps/@26.1435766,-80.4412922,15z

But it has more than six ramps. And it has no at-grade intersections.

On the other hand, it has roads.  That's something.

[tradephoric]

I-75 at College Ave is another Florida interchange without any traffic lights.  NB I-75 traffic exiting the freeway turning left onto College Avenue must cross 3-lanes of traffic without the assistance of a traffic signal.

https://www.google.com/maps/@27.7125666,-82.383995,654m/data=!3m1!1e3

Personally i love interchanges without traffic lights.  The I-75/College Ave interchange has been unsignalized for over 20 years and throughout that time it has been a relatively built up area.  If this heavily traveled interchange doesn't require traffic signals to regulate traffic, surely there are interchanges that have traffic signals that don't really need them.

[MCRoads]

https://www.mediafire.com/file/6vpo98f63r3z5w0/Unsignalized%20Parclos.kmz
https://www.mediafire.com/file/6vpo98f63r3z5w0/Unsignalized%20Parclos.kmz

Aren't those two the exact same link?

Woops!  Here is the correct link to the unsignalized Parclo that has dual left-turn lanes...

https://www.google.com/maps/@34.72793,-86.66928,361m/data=!3m1!1e3

That's the best thing I've ever seen. I didn't think an unsignalized dual left existed anywhere in the US. I know of many double lefts that yield, but they're all signalized.

There is an unsignalized double left turn in Hampton roads, va.

https://goo.gl/maps/7zXiAd5By6K2

[jp the roadgeek]

Closest one to me is I-691 Exit 7 in Meriden.  The ramps eastbound and westbound lead to different streets.  Eastbound meets the street at an angle where both have stop signs, while the westbound exit splits at the end with the southbound traffic meeting a stop sign and the northbound stub has no stop sign whatsoever.

https://goo.gl/maps/GX91gHeYGq32

https://goo.gl/maps/R6v8RroTfGU2

[roadman65]

In Kissimmee, FL the FL 417 and Osceola Parkway have a stop light, but has not been used in over 20 years.  The signal was installed when FL 417 opened there, and was used briefly after it opened, but Osceola County found them to be unwarranted and turned them into flashers, placed STOP signs on the 417 ramps and left the signals in tact all these years.

Now it may not count as being unsignalized for sake of the OP, but in fact acts as one as it has gotten busy around the area of the interchange, but Osceola County has not decided to reactivate these two signals that are at the ends of both the NB and SB ramps of 417.  Being that the STOP signs are in place it is legally considered to be a normal unsignalized intersection as the MUTCD requires the signs to be in place on even signals in the shore regions of the northern states where local towns after Labor Day turn the signals to flash mode until Memorial Day as the beaches are not crowded with Summer tourists those months where they still technically operate.  Apparently the FHWA does not allow a red beacon to solely be a traffic control device.  Short flashes at night or for just a few days are okay, but indefinitely is not okay.  Though I did hear of one such intersection in a place from Alex that has just the beacon and no Stop signs, but someone in Osceola County Roads in FL told me that the MUTCD (at the time, if it changed NE 2 will be on me here like Maple Syrup to Pancakes) does stress a rule.

[Big John]

^^Don't know where they are getting that from:  2009 MUTCD

Section 2B.05 STOP Sign (R1-1) and ALL WAY Plaque (R1-3P)

Standard:
01 When it is determined that a full stop is always required on an approach to an intersection, a STOP (R1-1) sign (see Figure 2B-1) shall be used.