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Triple "Left Turn Only" Lanes

Started by hm insulators, March 22, 2011, 02:08:42 PM

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D-Dey65

Quote from: nyratk1 on March 23, 2011, 11:51:36 PM
There's a triple left (two left turn only lanes and one shared movement) on I-495 (LIE)'s south service road heading to NB North Ocean Avenue (Suffolk CR 83) in Farmingville, NY, and also a triple left (two LTO and one shared with the straight and right movements) from the Roosevelt Field Mall to WB Old Country Road in Nassau County.

Not sure of any others on Long Island, as anything greater than double lefts is rare.
Really? I don't remember that the last time I was there. Double-lefts are pretty common along Sunrise Highway though, and this is both on the service roads, and the bridges that cross over or under it.  As far as triple-lefts go, westbound Florida State Road 50 has one to southbound US 41 in Brooksville, Florida. Most of the others I've seen are double-lefts with a shared movement lane, like you described.




2Co5_14

These are the ones I can remember off the top of my head.

2 in Marietta, GA:

Terrell Mill Rd WB @ Powers Ferry Rd
http://maps.google.com/maps/mm?hl=en&ie=UTF8&ll=33.918005,-84.466729&spn=0.00083,0.001711&t=h&z=20

Windy Hill Rd EB @ Powers Ferry Rd (2 left only lanes + 1 shared left/thru lane)
http://maps.google.com/maps/mm?hl=en&ie=UTF8&ll=33.905638,-84.464399&spn=0.00083,0.001711&t=h&z=20

Richmond, CA:
Blume Dr SB @ Hilltop Dr (this one has been there over 20 years, as I remember)
http://maps.google.com/maps?ie=UTF8&ll=37.976925,-122.324316&spn=0.001115,0.001203&t=h&z=20

Pinole, CA:
Fitzgerald Dr EB @ Appian Way (2 left only lanes + 1 shared left/thru lane)
http://maps.google.com/maps?ie=UTF8&ll=37.991504,-122.300558&spn=0.000788,0.001711&t=h&z=20

As a transportation engineer, I know triple lefts are getting more and more common as urban & suburban intersections get more congested. However, there are some more innovative intersection designs that have started appearing lately. (Maybe a topic for another thread?)



roadman65

What about in San Francisco where US 101 NB changes alignment from Van Ness Avenue to Lombard Street?  Google street view shows that there are more lanes going left than straight!  This is probably the only way to tell that 101 goes left here being Caltran does not have directional shields at this location!
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agentsteel53

Quote from: roadman65 on March 24, 2011, 05:25:27 PM
What about in San Francisco where US 101 NB changes alignment from Van Ness Avenue to Lombard Street?  Google street view shows that there are more lanes going left than straight!  This is probably the only way to tell that 101 goes left here being Caltran does not have directional shields at this location!

luckily, that intersection is so poorly signed in general that you will likely find yourself going left simply because you got into a left-turning lane and didn't know it.

try legally going straight there ... that's the real trick!
live from sunny San Diego.

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DRMan

Manchester NH: NH 28 South (S Willow St) going into the Mall of New Hampshire.  (There is another mall entrance a few hundred feet down the road with a double left.)

Michael


triplemultiplex

Looks like WisDOT wants to add some triple left turn lanes on WI 100(Mayfair Rd) in Wauwatosa as part of the big Zoo Interchange project.
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How did we miss that at the Akron/Canton meet last year!?   :)
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Traffic


There are 4 in the Triangle area that I know of, and there may be otehrs in the area or in NC:

In Raleigh:

I-440 EB Ramp (Beltline) at Wake Forest Road (Exit 10)
Lead Mine Road at Glenwood Ave.
Duraleigh Road at Glenwood Ave.

In Cary, on Weston Parkway at Harrison Ave.  Technically, this has 2 left lanes and a thru-left onto a nothing street, but it is a triple left onto Harrison.

There is also one triple right on the I-440 WB Ramp at Glenwood Ave. WB.

hm insulators

Wow, didn't realize there were so many of them. Thanks for the replies!  :nod:
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At what age do you tell a highway that it's been adopted?

wriddle082

I know of one in Nashville:  Trousdale Drive northbound to TN 255 Harding Place westbound (necessary for commuters to go from the Crieve Hall neighborhood to I-65).

Also in Louisville, KY, there is one for the main access road from the Oxmoor Center Mall turning left onto US 60 Shelbyville Rd westbound towards I-264.

mightyace

Quote from: wriddle082 on April 06, 2011, 06:37:05 PM
I know of one in Nashville:  Trousdale Drive northbound to TN 255 Harding Place westbound (necessary for commuters to go from the Crieve Hall neighborhood to I-65).

It's close but no cigar.  Left turns are allowed from the third (rightmost) lane but straight ahead is also allowed so only two lanes are "left turn only".

http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=harding+place+%26+trousdale+Nashville+tn&aq=&sll=37.0625,-95.677068&sspn=31.977057,79.013672&ie=UTF8&hq=&hnear=Harding+Pl+%26+Trousdale+Dr,+Nashville,+Davidson,+Tennessee&ll=36.08063,-86.758359&spn=0.000497,0.001206&t=k&z=20&layer=c&cbll=36.080676,-86.758349&panoid=E-RI5FpSefmF0vjGBTvZJA&cbp=12,351.42,,0,6.71
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r-dub

QuoteDenver and Colorado Springs have a few of these if I recall, it was one in the Springs that I saw that was the first time I saw one of these on two regular streets (non-freeways.)

Yup. Colorado Springs's is located at Fillmore/Circle and Union in the center of the city:

Union is a major N-S arterial, and Fillmore/Circle swings south after this intersection. The majority of the traffic here heads north on Union.
Ryan "r-dub"
Roadgeekin' Colorado Style

SSOWorld

http://maps.google.com/?ie=UTF8&ll=43.037172,-89.452545&spn=0.001347,0.002411&t=h&z=19

Triple left - but the right lane has an option to go straight.  Madison Beltline at Verona Road (Off topic - note the driveway on the freeway ramp.)
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jjakucyk

When I first saw the streets in the eastern fringe of the Bay Area I was pretty horrified.  In Dublin there's this monstrosity at Dublin Blvd. and Hacienda Dr. with triple lefts and double-rights.  Not counting the bike lanes, these are 8-11 lane roads.  It's not even a highway ramp, just a 4-way intersection. 

http://maps.google.com/maps?t=k&gl=us&om=0&ie=UTF8&ll=37.706141,-121.887884&spn=0.001341,0.002216&z=19

nyratk1

Quote from: D-Dey65 on March 24, 2011, 01:24:01 PM
Quote from: nyratk1 on March 23, 2011, 11:51:36 PM
There's a triple left (two left turn only lanes and one shared movement) on I-495 (LIE)'s south service road heading to NB North Ocean Avenue (Suffolk CR 83) in Farmingville, NY, and also a triple left (two LTO and one shared with the straight and right movements) from the Roosevelt Field Mall to WB Old Country Road in Nassau County.

Not sure of any others on Long Island, as anything greater than double lefts is rare.
Really? I don't remember that the last time I was there.

It's relatively recent, from around when they reconstructed the bridge over the LIE. Before that, it was a double left. It's on Google Maps:

http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=expressway+dr+s+and+county+road+83&aq=&sll=40.776026,-73.05907&sspn=0.157552,0.303497&ie=UTF8&hq=&hnear=County+Road+83+%26+Expy+Dr+N,+Medford,+Suffolk,+New+York+11763&ll=40.822351,-73.02038&spn=0.000619,0.001186&t=h&z=20

relaxok

Here in downtown San Francisco.. Lombard at Van Ness, northbound on Van Ness -- it's basically to stay on the city-streets stretch of US-101..

http://goo.gl/maps/KpkK

Edit: Sorry, roadman already mentioned this one - there's the link though..

Truvelo

Allowing for the fact that we drive on the left then our equivalent would be triple right turns. This is one example I can think of.
Speed limits limit life

jwolfer

Now this would be amazingingly rare... a Triple Left Turn in New Jersey

Bickendan

Quote from: thenetwork on March 25, 2011, 08:40:56 PM
I got you ALL beat:

Akron, OH -- E. Cedar Avenue @ S. Broadway...QUADRUPLE Left!

http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=akron+ohio&aq=&sll=37.0625,-95.677068&sspn=38.554089,107.138672&ie=UTF8&hq=&hnear=Akron,+Summit,+Ohio&ll=41.074709,-81.520899&spn=0.001122,0.00327&z=19&layer=c&cbll=41.074657,-81.520775&panoid=Tm5lQPWdXDi2sHaJBNoIsA&cbp=12,113.94,,0,0

Portland has that. SW 5th Ave at SW Sheridan St. Since all lanes are forced to turn onto Sheridan, I think it would be a little more impressive if 5th actually punched through with at least the right lane going straight, though in truth the left two lanes would have turned and the right two would have gone straight before veering a little to the left to become SW Barbur Blvd.

Ned Weasel

Off the top of my head, I know of two in Kansas and one in Missouri, aside from the one in Missouri that has already been mentioned in this thread.

Kansas:
Ramp from Westbound I-435 to Nall Avenue in Overland Park
Ramp from Westbound I-435 to Metcalf Avenue in Overland Park

Missouri:
Westbound Clark Lane at US 63 Connector in Columbia.  This one is interesting because the far-right left turn lane exists solely for traffic that later turns right to enter Westbound I-70.  Actually, this whole configuration of intersections and interchanges is interesting in itself.
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Columbia,+MO&aq=&sll=37.0625,-95.677068&sspn=37.410045,86.572266&ie=UTF8&hq=&hnear=Columbia,+Boone,+Missouri&ll=38.96344,-92.291722&spn=0.001122,0.002642&t=h&z=19
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Ned Weasel

Quote from: jwolfer on June 10, 2011, 05:40:09 PM
Now this would be amazingingly rare... a Triple Left Turn in New Jersey

When you mentioned that, I knew I saw one somewhere!

I've never seen this one IRL, but there's one set on a side road at US 206, immediately next to the interchange leading to Exit 7 of the New Jersey Turnpike.

http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=New+Jersey&aq=&sll=37.0625,-95.677068&sspn=37.410045,86.572266&ie=UTF8&hq=&hnear=New+Jersey&ll=40.12151,-74.706227&spn=0.002207,0.005284&t=h&z=18

As you can see, the far-right left turn lane is for traffic going directly to the Turnpike, while the other two are for traffic turning onto Northbound US 206.
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Disclaimer: Views I express are my own and don't reflect any employer or associated entity.

vtk

Columbus has a couple of examples I can think of.  There's a triple-left from Neil Ave SB to Long St EB (and no option to do anything else).  There's also a triple-left from NB Front St to WB Spring St, though the right-most of those can also go through on Front.  That one may change in coming years as the Front/Marconi/Civic Center/2nd one-way-pair is progressively converted to two-way streets.  (I like the one-way pairs, and I'm sad to see that one go.  However, another one is going to pop up on Fulton/Mound eventually..,)
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