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Unsignalized Double Left Turns

Started by MNHighwayMan, April 14, 2019, 06:05:26 AM

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mrsman

Quote from: Mr_Northside on May 18, 2021, 01:43:46 PM
From the northern suburbs of Pittsburgh (McCandless TWP, I do believe)The left turn from NB Babcock Blvd onto Corporate Drive is a dual left-turn that encounters a stop sign  (opposing traffic does NOT stop)

https://goo.gl/maps/PUp1G93aQF7ptP616

I know of a similar intersection in Sylmar, CA, but the left turn movement faces an all-way stop sign.  San Fernando at Truman.

https://www.google.com/maps/@34.2934263,-118.4519905,3a,75y,155.57h,74.24t/data=!3m6!1e1!3m4!1sMV5WIPPJZPcdk0ny-Q9A9Q!2e0!7i16384!8i8192



fwydriver405

During the MPA basketball playoff games this year... this left into the Cross Insurance Center was made into a double unsignalised left at least for the duration of the playoffs... from Buck St there were two lanes turning into the parking lot to access the arena. Seems like the signage has been like this for a while... GSV below was from 2019 but still signed the same as of 4 March 2022.

From Buck St.
Turning into the Cross Insurance Arena

Quote from: jakeroot on October 03, 2019, 02:44:59 AM
Quote from: Ian on October 02, 2019, 08:03:12 PM
The intersection of Maine and Mason Streets in Brunswick, Maine has a double left-turn that's protected only by flashing beacons.

Damn, that's a great example! Almost all of these are decidedly rural or suburban. This one is definitely very urban.

Just for the heck of it (and looking for something in the local area), I looked up the intersection using the GSV history. Seems like it was signalised with protected-only lefts initially before sometime in the mid 2000's where the signals were set to flash, and eventually, the signals converted to beacons in 2012-ish.

jakeroot

Quote from: fwydriver405 on March 04, 2022, 11:06:08 PM
Quote from: jakeroot on October 03, 2019, 02:44:59 AM
Quote from: Ian on October 02, 2019, 08:03:12 PM
The intersection of Maine and Mason Streets in Brunswick, Maine has a double left-turn that's protected only by flashing beacons.

Damn, that's a great example! Almost all of these are decidedly rural or suburban. This one is definitely very urban.

Just for the heck of it (and looking for something in the local area), I looked up the intersection using the GSV history. Seems like it was signalised with protected-only lefts initially before sometime in the mid 2000's where the signals were set to flash, and eventually, the signals converted to beacons in 2012-ish.

I'm not sure I've ever heard of a line of events like that: fully protected, flashing arrow, flashing beacon (still a yield). Normally it's the opposite, even for single lane turns. To have the opposite with double left turns is, well, I can't imagine there has ever been such a thing elsewhere.

Perhaps, if this was done elsewhere, northbound Maine would have a stop sign.

I looked up the intersection on Historic Aerials; even back in 2001, traffic turning left was yielding, judging by the car stopped midway into the intersection. Still see no indication of there ever being a stop line. Based on nearby intersections, I have to assume that they always use stop lines in Maine (they don't always over here, although without a crosswalk there normally would be).

ran4sh

At the main exit to Six Flags coming from Atlanta, the off ramp has an unsignalized double left turn onto the crossroad: https://goo.gl/maps/eEPC32PxRoXCQQLP9
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kphoger

Didn't want to start a separate thread for unsignalized right turn lanes.  Split it if you think it should be split.

Before the intersection was rebuilt a few years ago, the EB K-254 exit for 45th Street here in Wichita had one.  And the SB I-135 exit for 9th Street still does.  But are there examples at non-interchange locations?
Keep right except to pass.  Yes.  You.
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webny99

Also at an interchange, there's this absurdity at I-64 and KY 11 in Mount Sterling, KY. Fortunately, it's now been signalized. (I don't think I've ever seen an unsignalized double left or right turn in the wild, I just happened to remember this example from another thread.)

plain

Quote from: kphoger on December 02, 2022, 02:01:21 PM
Didn't want to start a separate thread for unsignalized right turn lanes.  Split it if you think it should be split.

Before the intersection was rebuilt a few years ago, the EB K-254 exit for 45th Street here in Wichita had one.  And the SB I-135 exit for 9th Street still does.  But are there examples at non-interchange locations?

VA 30 EB at Meadow Event Park

https://maps.app.goo.gl/voukmnMMra2yw3eW9
Newark born, Richmond bred

CardInLex

I use this one in Louisville, KY all the time. https://maps.app.goo.gl/ZvtjkYqckQkiLouFA?g_st=ic

Although there are now plans to change the ones way streets to two way streets in this area and this will be eliminated.

roadfro

A double unsignalized right turn in Nevada: WB Meadows Lane at Decatur Blvd.

Off hand, I can't think of another spot in Nevada where a double right turn situation is not signalized.
Roadfro - AARoads Pacific Southwest moderator since 2010, Nevada roadgeek since 1983.

jakeroot

Quote from: roadfro on December 04, 2022, 05:34:42 PM
A double unsignalized right turn in Nevada: WB Meadows Lane at Decatur Blvd.

Off hand, I can't think of another spot in Nevada where a double right turn situation is not signalized.

The right turn slip lane from Neil Rd to Southbound I-580 in Reno is two lanes with a yield: https://goo.gl/maps/cubTdoi1h4AYSgyj7

roadfro

#35
Quote from: jakeroot on December 06, 2022, 12:59:55 AM
Quote from: roadfro on December 04, 2022, 05:34:42 PM
A double unsignalized right turn in Nevada: WB Meadows Lane at Decatur Blvd.

Off hand, I can't think of another spot in Nevada where a double right turn situation is not signalized.

The right turn slip lane from Neil Rd to Southbound I-580 in Reno is two lanes with a yield: https://goo.gl/maps/cubTdoi1h4AYSgyj7

Forgot about that one.

I'm pretty sure that movement was signalized when it first became a double right turn (concurrent with construction of the roundabout at Kietzke/Neil/Del Monte in the mid-2000s). I can't confirm that in Street View, but the presence of a stop bar instead of a yield line and there being pedestrian signals across the movement despite the yield in older Street Views seems to corroborate that memory.
Roadfro - AARoads Pacific Southwest moderator since 2010, Nevada roadgeek since 1983.

countysigns

https://goo.gl/maps/gRhd5KSBf67K5oX7A
Until Jackson Street was changed to two-way traffic, this was a double left turn from 11th Street in uptown Toledo.



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