Plenty of intersections have double "left turn only" lanes, but recently, I noticed that in Phoenix, westbound Shea Blvd. to the southbound Arizona 51 Freeway is a triple left turn only. Any of those elsewhere?
I know I've seen them but can't think of one offhand.
however, I-805 NB offramp to Mira Mesa Blvd is a triple right. I should know, as it is about a quarter-mile away from my work.
Here's a video with a few triple left turn only lanes.
http://www.youtube.com/watch?v=limq5BlxDno
Be well,
Bryant
There's one right near where I live. It's the CA-85 southbound off-ramp to Stevens Creek Blvd. The ramp is 4 lanes wide. The far right lane is right-turn-only. The others are left-turn-only although the right-most left turn lane is marked as left-or-straight.
http://www.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=cupertino,+ca&aq=&sll=37.0625,-95.677068&sspn=35.410182,56.513672&ie=UTF8&hq=&hnear=Cupertino,+Santa+Clara,+California&ll=37.323132,-122.050668&spn=0.001535,0.001725&t=k&z=19 (http://www.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=cupertino,+ca&aq=&sll=37.0625,-95.677068&sspn=35.410182,56.513672&ie=UTF8&hq=&hnear=Cupertino,+Santa+Clara,+California&ll=37.323132,-122.050668&spn=0.001535,0.001725&t=k&z=19)
Just remembered there's another one in San Jose at the intersection of Trimble Road and Montague Expwy. There is a triple-left turn from west Montague to south Trimble and a triple-right turn from north Trimble to east Montague.
http://www.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=cupertino,+ca&aq=&sll=37.0625,-95.677068&sspn=35.410182,56.513672&ie=UTF8&hq=&hnear=Cupertino,+Santa+Clara,+California&t=k&ll=37.393382,-121.919293&spn=0.001534,0.001725&z=19 (http://www.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=cupertino,+ca&aq=&sll=37.0625,-95.677068&sspn=35.410182,56.513672&ie=UTF8&hq=&hnear=Cupertino,+Santa+Clara,+California&t=k&ll=37.393382,-121.919293&spn=0.001534,0.001725&z=19)
there are at least 2 around Jacksonville . 1 is at the I-295 NB offramp to US 17 South just north of Orange Park. There is also one in Brunswick,GA at the US 17 intersection with the FJ Torras Causeway to St Simons Island
There are 2 I can think of in Birmingham, one is at Riverchase Parkway @ Valleydale Rd, the other is at Summitt Blvd @ US 280.
Indiana
* I-465 at US 31 (northside) - both exit ramps have triple lefts:
http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.928621,-86.158623&spn=0.001551,0.00515&t=k&z=19 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.928621,-86.158623&spn=0.001551,0.00515&t=k&z=19)
http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.931617,-86.157902&spn=0.001551,0.00515&t=k&z=19 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.931617,-86.157902&spn=0.001551,0.00515&t=k&z=19)
* WB I-465 at US 421 (that straight movement is probably of such low volume I'd count this one as only and not shared):
http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.924594,-86.228279&spn=0.000775,0.002575&t=k&z=20 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.924594,-86.228279&spn=0.000775,0.002575&t=k&z=20)
Missouri
* EB I-270 at McDonnell:
http://maps.google.com/maps?hl=en&ie=UTF8&ll=38.7774,-90.389162&spn=0.001568,0.00515&t=k&z=19 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=38.7774,-90.389162&spn=0.001568,0.00515&t=k&z=19)
There are at least two here in Gaithersburg:
- MD 355 north at MD 124 (view (http://maps.google.com/?ie=UTF8&ll=39.15994,-77.202009&spn=0.001726,0.004128&t=k&z=19))
- MD 124 south, turning from Midcounty Hwy onto Montgomery Village Ave (view (http://maps.google.com/?ie=UTF8&ll=39.152428,-77.211568&spn=0.001726,0.004128&t=k&z=19))
I-65 at US 30 in Merrillville, Indiana
http://goo.gl/maps/kqGd (http://goo.gl/maps/kqGd)
I actually started a thread about this after the city of Hampton, VA, built a pair of triple left turn lanes two years or so ago. On Armistead Avenue (VA 134) at Mercury Blvd (US 258).
http://goo.gl/maps/EnSQ
Northbound Florida's Turnpike at Exit 272 near Winter Garden, FL had three left turn lanes.
There's one here in Lexington. Man O War Boulevard have triple left turn lanes leading into US 421/25 west (known as Richmond Road) since US 421/25 have three lanes per direction
The ramp from I-5 southbound at SR 512 has one. The interchange used to be a full cloverleaf, but the SB-EB movement moved to a traffic signal about a decade ago. Google Maps (http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Lakewood,+WA&aq=&sll=35.317366,-95.625&sspn=56.353561,158.027344&ie=UTF8&hq=&hnear=Lakewood,+Pierce,+Washington&ll=47.163619,-122.481916&spn=0.005865,0.01929&t=h&z=16)
I remember reading a newspaper article - probably somewhere between 2 and 5 years ago - saying that one and a then-brand new one on or near SR 410 in the Sumner/Buckley/Enumclaw area were the only ones in the state, but I don't recall exactly where that one is.
The ramp from EBD US-12/18 in Madison, WI to NBD US-51 features three left turn only lanes:
http://maps.google.com/maps?gl=us&ie=UTF8&ll=43.04586,-89.307845&spn=0.002191,0.005493&t=k&z=18
Reno, NV area:
S. Virginia St SB to S. McCarran Blvd EB (http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=S+McCarran+Blvd+%26+S+Virginia+St,+Reno,+NV&aq=&sll=39.533349,-119.715289&sspn=0.005329,0.011276&ie=UTF8&hq=&hnear=S+Virginia+St+%26+S+McCarran+Blvd,+Reno,+Washoe,+Nevada+89502&ll=39.477103,-119.789222&spn=0.001325,0.002819&t=h&z=19)
Sparks Blvd NB to Lincoln Way WB
I-80 EB off ramp to McCarran Blvd East NB (http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=S+McCarran+Blvd+%26+Nugget+Ave,+Sparks,+NV&aq=&sll=39.477103,-119.789222&sspn=0.001325,0.002819&ie=UTF8&hq=&hnear=S+McCarran+Blvd+%26+E+Nugget+Ave,+Sparks,+Washoe,+Nevada+89431&ll=39.533091,-119.73906&spn=0.000662,0.00141&t=h&z=20) - to be fair, the 3rd lane is a shared turn/thru (but that thru movement never happens)
Las Vegas, NV area:
I-15 NB ramp to Flamingo Rd WB (http://maps.google.com/maps?f=q&source=s_q&hl=en&q=W+Flamingo+Rd+%26+Hotel+Rio+Dr,+Paradise,+Clark,+Nevada+89103&aq=&sll=36.217592,-115.1243&sspn=0.001385,0.002819&ie=UTF8&geocode=FTITJwIdo2Ii-Q&split=0&hq=&hnear=W+Flamingo+Rd+%26+Hotel+Rio+Dr,+Paradise,+Clark,+Nevada+89103&ll=36.114384,-115.180085&spn=0.001387,0.002819&t=h&z=19)
I-15 NB ramp to Cheyenne Ave WB (http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Cheyenne+Ave+%26+Losee+Road,+North+Las+Vegas,+NV&aq=&sll=37.0625,-95.677068&sspn=44.339735,92.373047&ie=UTF8&hq=&hnear=E+Cheyenne+Ave+%26+Losee+Rd,+North+Las+Vegas,+Clark,+Nevada+89030&ll=36.217592,-115.1243&spn=0.001385,0.002819&t=h&z=19) (a SPUI)
Too many to list on the Las Vegas Strip (most serving entrances to Casino/Resort properties).
Las Vegas even has at least one instance of triple "Right Turn Only" lanes: US 95 South & Summerlin Pkwy East exit ramp to Rainbow Blvd SB (http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Rainbow+Blvd+%26+Westcliff+Dr,+Las+Vegas,+NV&aq=&sll=36.173781,-115.244299&sspn=0.011086,0.022552&g=Rainbow+Blvd+%26+Westcliff+Ave,+Las+Vegas,+NV&ie=UTF8&hq=&hnear=S+Rainbow+Blvd+%26+Westcliff+Dr,+Las+Vegas,+Clark,+Nevada+89145&ll=36.17631,-115.244519&spn=0.001386,0.002819&t=h&z=19) (a wide SPUI) This one probably would have been a double right if it weren't for the configuration of connecting ramps upstream, but it is a very high volume ramp though.
Yeah, I've seen the occasional triple left and triple right (the latter at I-4 and US 27 (http://maps.google.com/maps?ll=28.234321,-81.653481&spn=0.007864,0.020599&t=k&z=17&layer=c&cbll=28.234321,-81.653481&panoid=4q7DpNtmUHaEbFDGlcBjZA&cbp=12,22.63,,0,-16.61)). But how about a quadruple left? Do any of those exist?
Quote from: NE2 on March 22, 2011, 11:14:31 PM
Yeah, I've seen the occasional triple left and triple right (the latter at I-4 and US 27 (http://maps.google.com/maps?ll=28.234321,-81.653481&spn=0.007864,0.020599&t=k&z=17&layer=c&cbll=28.234321,-81.653481&panoid=4q7DpNtmUHaEbFDGlcBjZA&cbp=12,22.63,,0,-16.61)). But how about a quadruple left? Do any of those exist?
From an old MTR thread: 32nd Avenue and Astoria Boulevard North over the "the 278" in Queens. http://maps.google.com/?ll=40.770036,-73.916525&spn=0.000902,0.001829&t=h
The ramp from I-490 east to NY 441 has a triple left.
Denver 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.)
There is such a setup in Metairie, LA at the intersection of Clearview Pkwy and Veterans Blvd. (http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=metairie,+la&aq=&sll=37.0625,-95.677068&sspn=53.345014,79.013672&ie=UTF8&hq=&hnear=Metairie,+Jefferson,+Louisiana&ll=30.005112,-90.185342&spn=0.001273,0.001206&t=k&z=20) The movement from WB Vets to SB Clearview is a triple left.
There is also a triple left in Northport, AL at the intersection of US 82 (McFarland Blvd) and US 43/AL 69 (Lurleen Wallace Blvd) (http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=hoover,+al&aq=&sll=30.005304,-90.18524&sspn=0.001238,0.001206&ie=UTF8&hq=&hnear=Hoover,+Jefferson,+Alabama&ll=33.23867,-87.576393&spn=0.001748,0.002411&t=k&z=19). The NB to WB movement is a triple left.
The only one I could find in CNY was at the eastern split of the NY 5/92 duplex in Fayetteville (Street View (http://maps.google.com/?ie=UTF8&t=h&layer=c&cbll=43.028537,-76.045871&panoid=QbrkaH6hVKpf6pUVjyjBsg&cbp=12,119.07,,0,-8.11&ll=43.028618,-76.04606&spn=0,0.002411&z=19)). I'm not sure if it really counts because one movement is a hard left to Lyndon Road and the other two are a gradual left to continue on NY 5 East.
They just put two in here in Palm Bay. One is at the west end of Palm Bay Road (CR516), the other is at the SB Palm Bay Road exit on I-95. The one on the exit actually is set up with two left turn only lanes, a left turn/right turn option lane, and two right turn only lanes.
Quote from: Revive 755 on March 22, 2011, 05:39:45 PM
Indiana
* I-465 at US 31 (northside) - both exit ramps have triple lefts:
http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.928621,-86.158623&spn=0.001551,0.00515&t=k&z=19 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.928621,-86.158623&spn=0.001551,0.00515&t=k&z=19)
http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.931617,-86.157902&spn=0.001551,0.00515&t=k&z=19 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.931617,-86.157902&spn=0.001551,0.00515&t=k&z=19)
* WB I-465 at US 421 (that straight movement is probably of such low volume I'd count this one as only and not shared):
http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.924594,-86.228279&spn=0.000775,0.002575&t=k&z=20 (http://maps.google.com/maps?hl=en&ie=UTF8&ll=39.924594,-86.228279&spn=0.000775,0.002575&t=k&z=20)
There is also one at 96th street and Meridian Street (U.S. 31) just south of I-465.
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.
There's one near Stanton, Delaware where DE 4 eastbound turns left to multiplex with DE 7 northbound.
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.
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 (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 (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 (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 (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?)
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!
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!
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.)
I found another triple left at the I-81/US 11 interchange in Mattydale, NY (http://maps.google.com/?ie=UTF8&ll=43.108955,-76.146366&spn=0,0.002642&t=h&z=19&layer=c&cbll=43.108955,-76.146366&panoid=kReporXAQhTBwmZbD1svug&cbp=12,56.25,,0,7.31).
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.
(Or in the local dialect "highway a-hun-derd")
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
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
You know what, I didn't give that a second thought. :pan:
How did we miss that at the Akron/Canton meet last year!? :)
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.
Wow, didn't realize there were so many of them. Thanks for the replies! :nod:
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.
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
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:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fr-dub.us%2Fpics%2Ftripleft.jpg&hash=cbaf410f7287a9b559db0cf0ea13594c7db14152)
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.
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.)
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
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
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 (http://goo.gl/maps/KpkK)
Edit: Sorry, roadman already mentioned this one - there's the link though..
Allowing for the fact that we drive on the left then our equivalent would be triple right turns. This (http://maps.google.com/?ie=UTF8&ll=52.467114,-1.900753&spn=0.001335,0.004506&t=k&z=19) is one example I can think of.
Now this would be amazingingly rare... a Triple Left Turn in New Jersey
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.
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
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.
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..,)
Northbound Loisdale Road at Franconia Road in Springfield, Virginia. The link below is to the satellite view because it's easier to see the pavement markings than it is in the Street View mode. Loisdale is the street running from top to bottom in the middle of the image. The leftmost left-turn lane is for westbound VA-644 (changes names after it crosses I-95). The second one from the left is for I-395 north and for the Beltway; the third one from the left is for southbound I-95. There are a lot of overhead little green signs indicating which lane for which road, although they don't give destinations. In typical DC-area driver fashion, it's quite common to see people get in the lane for southbound I-95 and then try to shove across the gore area at the last second regardless of how many cars are in the other lane. The Springfield area is rather unforgiving in that it's a place where it's fairly important to be in the correct lane for your destination because if you miss your turn or your exit, you may have to drive several miles before you can turn around for another try depending on which road you're using.
http://maps.google.com/?ie=UTF8&ll=38.777847,-77.176174&spn=0.001549,0.004128&t=k&z=19
Quote from: stridentweasel on June 11, 2011, 01:27:18 AM
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
BLECH! Have a purpose-built connector road between two freeways, and put two at-grade intersections on it? Who ordered that?
That's not 'purpose-built'; it's the old alignment of US 63.
Quote from: 1995hoo on June 11, 2011, 03:09:31 PM
Northbound Loisdale Road at Franconia Road in Springfield, Virginia. The link below is to the satellite view because it's easier to see the pavement markings than it is in the Street View mode.
http://maps.google.com/?ie=UTF8&ll=38.777847,-77.176174&spn=0.001549,0.004128&t=k&z=19
I can think of two more in the DC area
1. VA 123 at Old Bridge Road just off I-95 in Occoquan, VA
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Occoquan,+VA&aq=&sll=37.926868,-95.712891&sspn=32.864359,77.34375&ie=UTF8&hq=&hnear=Occoquan,+Prince+William,+Virginia&ll=38.675331,-77.255122&spn=0.001051,0.00236&t=h&z=19&layer=c&cbll=38.675331,-77.255122&panoid=DtTWNcpmrwaS_ccWTu7uXg&cbp=12,346.25,,0,6.14
2. US 301 & MD 5 in Waldorf, MD
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Waldorf,+MD&aq=&sll=38.675331,-77.255122&sspn=0.00106,0.00236&ie=UTF8&hq=&hnear=Waldorf,+Charles,+Maryland&ll=38.657576,-76.875026&spn=0.00053,0.00118&t=h&z=20
I discovered another one in Memphis on Monday:
Ridgeway Road NB to US 72 (Poplar Ave) Westbound:
http://www.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=memphis,+tn&aq=&sll=38.8913,-77.0224&sspn=0.167815,0.235519&ie=UTF8&hq=&hnear=Memphis,+Shelby,+Tennessee&ll=35.101517,-89.859294&spn=0.001378,0.00184&t=h&z=19&layer=c&cbll=35.101611,-89.859293&panoid=sDlxVb4ad4ttmiY63kmWkQ&cbp=12,357.57,,0,1.31
Quote from: MASTERNC on June 15, 2011, 09:49:49 PM
I can think of two more in the DC area
1. VA 123 at Old Bridge Road just off I-95 in Occoquan, VA
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Occoquan,+VA&aq=&sll=37.926868,-95.712891&sspn=32.864359,77.34375&ie=UTF8&hq=&hnear=Occoquan,+Prince+William,+Virginia&ll=38.675331,-77.255122&spn=0.001051,0.00236&t=h&z=19&layer=c&cbll=38.675331,-77.255122&panoid=DtTWNcpmrwaS_ccWTu7uXg&cbp=12,346.25,,0,6.14
SR 3000 (Prince William Pkwy) comes close; it has two left turn lanes and a thru or left turn lane when it turns onto itself at SR 641 (Old Bridge Rd, interestingly enough).
Newport News, VA got a new almost-example about a week or so ago when the widened Bland Blvd at Jefferson Ave (VA 143) intersection opened. Approaching from the west (64 overpass / Jefferson Commons) Bland now has 2 LTO lanes, 1 left or thru, 2 thru, and 2 RTO lanes.
in Wisconsin:
Madison:
US 12/US 51 interchange left, left, strait left
US 12/US 151 interchange left, left, strait left
US 12/W. mineral point road interchange left, left, strait left
Milwaukee:
I 43/ WI 145 interchange left, left strait left
Waukesha:
WI 59/WI 164 triple left
NW 136th Avenue at Flamingo Road in Sunrise, Florida has a triple-left, so traffic can easily leave the Bank Atlantic Center. Otherwise, it really isn't all that necessary...but a helpful and thoughtful touch after the games.
There is one at 144th Street & Millard Avenue in Omaha.
There are possible triple lefts planned at 41st & Louise (for Louise to 41st traffic) in Sioux Falls, SD. A center turn overpass is also being considered for that intersection.
There's one in Gilroy, where CA 152 intersects Camino Arroyo. The triple left turns are found northbound on Camino Arroyo. The reason for this is that it is the only way from the shopping center south of 152 to go west on 152 (and also to 101) is to take these turns.
EB Gonzales Road at Rose Avenue in Oxnard
SB Mills Road at Main Street in Ventura
SB 101 at Las Posas Road in Camarillo
Ive seen at least one in Orange County, CA but i cant think of where. And there's one off the West I-210 @ Sunland Blvd
Jamboree and PCH
Quote from: Eth on March 22, 2011, 06:11:57 PM
There are at least two here in Gaithersburg:
- MD 355 north at MD 124 (view (http://maps.google.com/?ie=UTF8&ll=39.15994,-77.202009&spn=0.001726,0.004128&t=k&z=19))
- MD 124 south, turning from Midcounty Hwy onto Montgomery Village Ave (view (http://maps.google.com/?ie=UTF8&ll=39.152428,-77.211568&spn=0.001726,0.004128&t=k&z=19))
I think you have the links reversed. I go through the 355/124 regularly and often you can't make it through on a single light cycle.
One of the turns into Fort Gordon (west of Augusta, Georgia), off of Gordon Highway (US 78/US 278/SR 10) has three lanes. Here is a link to Google Maps satellite view of the turn to back it up.
http://maps.google.com/maps?q=%22Fort+Gordon%22&ll=33.440802,-82.117367&spn=0.00085,0.000862&oe=utf-8&client=firefox-a&hq=%22Fort+Gordon%22&t=h&z=20 (http://maps.google.com/maps?q=%22Fort+Gordon%22&ll=33.440802,-82.117367&spn=0.00085,0.000862&oe=utf-8&client=firefox-a&hq=%22Fort+Gordon%22&t=h&z=20)
In about two weeks Springfield will have it's first Triple Left Turn. Eastbound US 60 to Southbound US160/MO13 http://maps.google.com/maps?q=Springfield,+MO&hl=en&ll=37.137338,-93.295939&spn=0.002461,0.002411&sll=37.0625,-95.677068&sspn=55.937499,79.013672&oq=spring&t=h&hnear=Springfield,+Greene,+Missouri&z=19 (http://maps.google.com/maps?q=Springfield,+MO&hl=en&ll=37.137338,-93.295939&spn=0.002461,0.002411&sll=37.0625,-95.677068&sspn=55.937499,79.013672&oq=spring&t=h&hnear=Springfield,+Greene,+Missouri&z=19). Something like 5,500 cars in the 7:00 Hour. :crazy:(for southwest missouri anyways) :crazy:
Quote from: intelati49 on May 02, 2012, 03:13:21 PM
In about two weeks Springfield will have it's first Triple Left Turn. Eastbound US 60 to Southbound US160/MO13 http://maps.google.com/maps?q=Springfield,+MO&hl=en&ll=37.137338,-93.295939&spn=0.002461,0.002411&sll=37.0625,-95.677068&sspn=55.937499,79.013672&oq=spring&t=h&hnear=Springfield,+Greene,+Missouri&z=19 (http://maps.google.com/maps?q=Springfield,+MO&hl=en&ll=37.137338,-93.295939&spn=0.002461,0.002411&sll=37.0625,-95.677068&sspn=55.937499,79.013672&oq=spring&t=h&hnear=Springfield,+Greene,+Missouri&z=19). Something like 5,500 cars in the 7:00 Hour. :crazy:(for southwest missouri anyways) :crazy:
I'm glad the bottom of your post said 'Missouri'. It should be prohibited to type 'Springfield' on here without identifying the state.
Quote from: kphoger on May 02, 2012, 03:20:50 PM
It should be prohibited to type 'Springfield' on here without identifying the state.
Unless referring to the hometown of The Simpsons.
Quote from: vtk on May 02, 2012, 09:11:09 PM
Quote from: kphoger on May 02, 2012, 03:20:50 PM
It should be prohibited to type 'Springfield' on here without identifying the state.
Unless referring to the hometown of The Simpsons.
:banghead:
If Louisiana has one of these, my bet is it's in Lafayette or New Orleans...
Quote from: intelati49 on May 02, 2012, 03:13:21 PM
In about two weeks Springfield will have it's first Triple Left Turn. Eastbound US 60 to Southbound US160/MO13 http://maps.google.com/maps?q=Springfield,+MO&hl=en&ll=37.137338,-93.295939&spn=0.002461,0.002411&sll=37.0625,-95.677068&sspn=55.937499,79.013672&oq=spring&t=h&hnear=Springfield,+Greene,+Missouri&z=19 (http://maps.google.com/maps?q=Springfield,+MO&hl=en&ll=37.137338,-93.295939&spn=0.002461,0.002411&sll=37.0625,-95.677068&sspn=55.937499,79.013672&oq=spring&t=h&hnear=Springfield,+Greene,+Missouri&z=19). Something like 5,500 cars in the 7:00 Hour. :crazy:(for southwest missouri anyways) :crazy:
I think you meant westbound US 60 (James River Freeway). I don't doubt that it's needed. I remember Campbell being a bitch at the best of times when I used to live in Springfield.
I'm totally gonna necro this thread because I discovered one yesterday.
http://goo.gl/maps/HdA8
Carmel Mountain Road eastbound turning onto El Camino Real northbound, just north of where I work.
I came across one the previous weekend....
Arundel Mills Blvd EB at Arundel Mills Cir has one for the new casino access. I haven't seen a satellite image updated enough to show you it though.
Tucson AZ has one from EB Ajo Way to NB Alvernon Way. Left two lanes turn left. Third lane has the option to go straight through the intersection. It's just south of where Aviation Hwy (AZ 210) connects to Golf Links Rd.
Laguna Hills, CA recently increased two left turn lanes to three at Ave De La Carlota southbound to El Toro Rd eastbound
WB El Cajon Blvd to WB I-8 in El Cajon. Granted, the third lane is for carpools only, but it's a triple left nonetheless.
There used to be one at Sabino Canyon Rd and Tanque Verde Rd in Tucson, but construction has eliminated it.
Quadruple! :)
-PA 3 (Market St.) EB at 611 (Center Square) in Philly: http://maps.google.com/?ll=39.952657,-75.165324&spn=0.001195,0.002642&hnear=Pennsylvania&t=k&z=19&layer=c&cbll=39.952657,-75.165836&panoid=vZdq4ndUye6wwEE2yvbAsA&cbp=12,95.45,,0,11.99 (http://maps.google.com/?ll=39.952657,-75.165324&spn=0.001195,0.002642&hnear=Pennsylvania&t=k&z=19&layer=c&cbll=39.952657,-75.165836&panoid=vZdq4ndUye6wwEE2yvbAsA&cbp=12,95.45,,0,11.99)
-Unofficial but signed I-676 EB at Philly's Breezewood: http://maps.google.com/?ll=39.956543,-75.14911&spn=0.001203,0.002642&hnear=Pennsylvania&t=k&z=19&layer=c&cbll=39.956542,-75.149623&panoid=Z0bfV3HDuFSiYDpHZ7Djbg&cbp=12,121.39,,0,8.83 (http://maps.google.com/?ll=39.956543,-75.14911&spn=0.001203,0.002642&hnear=Pennsylvania&t=k&z=19&layer=c&cbll=39.956542,-75.149623&panoid=Z0bfV3HDuFSiYDpHZ7Djbg&cbp=12,121.39,,0,8.83)
Don't know if this one has been posted yet, but here's a quadruple left. http://goo.gl/maps/0RC0Z
Thing is though, if you check out the street view imagery from the road that this bridge is turning onto, it's been turned into a triple left (good call NY, lol).
Also in Laguna Hills. West end of Los Alisos Blvd. to Paseo de Valencia.
In Costa Mesa, Fairview Rd. south to I-405, CA 55 and CA 73 south.
Another one in VA is westbound VA-294/Prince William Pkwy at SR-640/Minnieville Rd in Woodbridge.
Not quite exactly triple "left" turn lanes, but it's close enough. On the northbound 101 Tully Road offramp in San Jose, there is a triple right turn as part of the newly redesigned exit there.
Northbound US-101 turning from Van Ness to Lombard in San Francisco.
Quote from: stridentweasel on June 11, 2011, 01:38:27 AM
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.
In addition, there are two other triple lefts in NJ, along with a triple right:
http://goo.gl/maps/umhQ0
At the (former) Airport Circle in Camden/Pennsauken, NJ. Formerly a complete circle, the thru traffic on Rt. 38 goes over the circle. Traffic exiting NJ 38 WB onto US 30 EB/130 SB utilizes a portion of the former circle, creating the Triple Left Turn.
http://goo.gl/maps/oy8C6
NJ 73 NB to NJ 70 WB. This is an unconventional NJ Jughandle situation. I'm not sure if the final pavement markings are complete yet (the picture was taken near the end of the reconstruction project here), but using the photo, the left 2 lanes will be for traffic turn left onto Rt. 70 WB (the far left lane in the photo is only marked for left turns near the stop line). The right-center lane will be for left turns onto NJ 70 WB, then quickly onto 73 NB (this movement is necessary due to W Main St entering the jughandle. Zoom out a bit to see that). The movement is very similiar to the one previously posted.
NJ's Triple Right:
http://goo.gl/maps/KwrJQ
Baltic Ave onto the AC Expressway WB. OK, those that want to get technical will notice the lane markings on Baltic show the middle lane is for straight & right turn movements. But then the lane splits, forming the 3 right turn lanes, and then all 3 right turn lanes are controlled by a traffic light. So good enough to compare to the few triple rights that exist.
Quote from: roadfro on March 22, 2011, 11:05:56 PM
Reno, NV area:
S. Virginia St SB to S. McCarran Blvd EB (http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=S+McCarran+Blvd+%26+S+Virginia+St,+Reno,+NV&aq=&sll=39.533349,-119.715289&sspn=0.005329,0.011276&ie=UTF8&hq=&hnear=S+Virginia+St+%26+S+McCarran+Blvd,+Reno,+Washoe,+Nevada+89502&ll=39.477103,-119.789222&spn=0.001325,0.002819&t=h&z=19)
Sparks Blvd NB to Lincoln Way WB
I-80 EB off ramp to McCarran Blvd East NB (http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=S+McCarran+Blvd+%26+Nugget+Ave,+Sparks,+NV&aq=&sll=39.477103,-119.789222&sspn=0.001325,0.002819&ie=UTF8&hq=&hnear=S+McCarran+Blvd+%26+E+Nugget+Ave,+Sparks,+Washoe,+Nevada+89431&ll=39.533091,-119.73906&spn=0.000662,0.00141&t=h&z=20) - to be fair, the 3rd lane is a shared turn/thru (but that thru movement never happens)
New! WB S. McCarran Blvd. to SB Longley Lane. The third turn lane was just recently added.
A tripple left turn in MA in a relatively rural area. Seems a bit out of place really.
http://maps.google.com/maps?ll=42.350082,-71.623454&z=18&t=h&hl=en
There's one in Chicago on 57th Street at Lake Shore Drive:
http://maps.google.com/maps?q=chicago,+il&hl=en&ll=41.792591,-87.579862&spn=0.00239,0.004128&sll=40.15736,-74.801788&sspn=0.445542,1.056747&hnear=Chicago,+Cook,+Illinois&t=k&z=19 (http://maps.google.com/maps?q=chicago,+il&hl=en&ll=41.792591,-87.579862&spn=0.00239,0.004128&sll=40.15736,-74.801788&sspn=0.445542,1.056747&hnear=Chicago,+Cook,+Illinois&t=k&z=19)
Supposedly there is one more in the Illinois part of Chicagoland, but I haven't found it yet.
Quote from: Roadsguy on July 07, 2012, 09:43:28 AM
Quadruple! :)
-PA 3 (Market St.) EB at 611 (Center Square) in Philly: http://maps.google.com/?ll=39.952657,-75.165324&spn=0.001195,0.002642&hnear=Pennsylvania&t=k&z=19&layer=c&cbll=39.952657,-75.165836&panoid=vZdq4ndUye6wwEE2yvbAsA&cbp=12,95.45,,0,11.99 (http://maps.google.com/?ll=39.952657,-75.165324&spn=0.001195,0.002642&hnear=Pennsylvania&t=k&z=19&layer=c&cbll=39.952657,-75.165836&panoid=vZdq4ndUye6wwEE2yvbAsA&cbp=12,95.45,,0,11.99)
-Unofficial but signed I-676 EB at Philly's Breezewood: http://maps.google.com/?ll=39.956543,-75.14911&spn=0.001203,0.002642&hnear=Pennsylvania&t=k&z=19&layer=c&cbll=39.956542,-75.149623&panoid=Z0bfV3HDuFSiYDpHZ7Djbg&cbp=12,121.39,,0,8.83 (http://maps.google.com/?ll=39.956543,-75.14911&spn=0.001203,0.002642&hnear=Pennsylvania&t=k&z=19&layer=c&cbll=39.956542,-75.149623&panoid=Z0bfV3HDuFSiYDpHZ7Djbg&cbp=12,121.39,,0,8.83)
Another Philly quadruple right is the infamous I-676 (Vine Street Expressway) to I-676 (Ben Franklin Bridge). 4 lanes must turn right at the light...followed by 3 lanes making a hard left onto the bridge.
One can kinda call this a triple left in Philly - leaving the Citizens Bank Parking lot after a game at one particular exit point, 5 lanes lead out of the parking lot, with the left 3 turning left onto Broad St.
Quote from: tradephoric on September 13, 2012, 10:47:18 PM
A tripple left turn in MA in a relatively rural area. Seems a bit out of place really.
http://maps.google.com/maps?ll=42.350082,-71.623454&z=18&t=h&hl=en
Must be a popular mall for Worcesterians. (Worcesterites?)
Quote from: Steve on September 14, 2012, 07:35:13 PM
Must be a popular mall for Worcesterians. (Worcesterites?)
Worcesteroids.
Kidding – I actually have no idea – but it
should be that. Or maybe Worcesterfieldianites.
Quote from: jeffandnicole on September 14, 2012, 09:49:44 AM
Quote from: Roadsguy on July 07, 2012, 09:43:28 AM
Quadruple! :)
-Unofficial but signed I-676 EB at Philly's Breezewood: http://maps.google.com/?ll=39.956543,-75.14911&spn=0.001203,0.002642&hnear=Pennsylvania&t=k&z=19&layer=c&cbll=39.956542,-75.149623&panoid=Z0bfV3HDuFSiYDpHZ7Djbg&cbp=12,121.39,,0,8.83 (http://maps.google.com/?ll=39.956543,-75.14911&spn=0.001203,0.002642&hnear=Pennsylvania&t=k&z=19&layer=c&cbll=39.956542,-75.149623&panoid=Z0bfV3HDuFSiYDpHZ7Djbg&cbp=12,121.39,,0,8.83)
Another Philly quadruple right is the infamous I-676 (Vine Street Expressway) to I-676 (Ben Franklin Bridge). 4 lanes must turn right at the light...followed by 3 lanes making a hard left onto the bridge.
Kinda already said that. :sombrero:
Quote from: Roadsguy on September 15, 2012, 09:34:59 AM
Quote from: jeffandnicole on September 14, 2012, 09:49:44 AM
Quote from: Roadsguy on July 07, 2012, 09:43:28 AM
Quadruple! :)
-Unofficial but signed I-676 EB at Philly's Breezewood: http://maps.google.com/?ll=39.956543,-75.14911&spn=0.001203,0.002642&hnear=Pennsylvania&t=k&z=19&layer=c&cbll=39.956542,-75.149623&panoid=Z0bfV3HDuFSiYDpHZ7Djbg&cbp=12,121.39,,0,8.83 (http://maps.google.com/?ll=39.956543,-75.14911&spn=0.001203,0.002642&hnear=Pennsylvania&t=k&z=19&layer=c&cbll=39.956542,-75.149623&panoid=Z0bfV3HDuFSiYDpHZ7Djbg&cbp=12,121.39,,0,8.83)
Another Philly quadruple right is the infamous I-676 (Vine Street Expressway) to I-676 (Ben Franklin Bridge). 4 lanes must turn right at the light...followed by 3 lanes making a hard left onto the bridge.
Kinda already said that. :sombrero:
D'oh!
One in the Knoxville, TN area for the south frontage road for I-640 at US 441:
http://maps.google.com/maps?q=knoxville,+tn&hl=en&ll=36.017856,-83.922898&spn=0.002593,0.004128&sll=42.032432,-88.091192&sspn=0.215482,0.528374&hnear=Knoxville,+Knox,+Tennessee&t=k&z=19 (http://maps.google.com/maps?q=knoxville,+tn&hl=en&ll=36.017856,-83.922898&spn=0.002593,0.004128&sll=42.032432,-88.091192&sspn=0.215482,0.528374&hnear=Knoxville,+Knox,+Tennessee&t=k&z=19)
http://maps.google.com/maps?q=knoxville,+tn&hl=en&ll=36.017192,-83.922823&spn=0.000651,0.001032&sll=42.032432,-88.091192&sspn=0.215482,0.528374&hnear=Knoxville,+Knox,+Tennessee&t=k&z=21&layer=c&cbll=36.017192,-83.922823&panoid=tfM0RRvG01M0NMCxVvxoVw&cbp=12,76.86,,0,2.75 (http://maps.google.com/maps?q=knoxville,+tn&hl=en&ll=36.017192,-83.922823&spn=0.000651,0.001032&sll=42.032432,-88.091192&sspn=0.215482,0.528374&hnear=Knoxville,+Knox,+Tennessee&t=k&z=21&layer=c&cbll=36.017192,-83.922823&panoid=tfM0RRvG01M0NMCxVvxoVw&cbp=12,76.86,,0,2.75)
They finally updated Google Maps for the one near Arundel Mills....
http://goo.gl/maps/gUHgL
Aurora, CO: NB I-225 offramp to Parker Blvd (SH 83). Three left turn lanes AND three right turn lanes.
https://maps.google.com/?ll=39.658089,-104.841829&spn=0.001559,0.002642&t=h&z=19
I-435 WB offramp to Nall Ave. (exit 77B) in Overland Park, KS:
https://maps.google.com/?ll=39.658089,-104.841829&spn=0.001559,0.002642&t=h&z=19
I-465 ramp onto US-31 on north side of Indy: http://goo.gl/maps/xT934 (http://goo.gl/maps/xT934)
This one will go away in a couple of years when US-31 gets upgraded to freeway and the exit is revised.
All kinds of them in Colorado:
Aurora
EB Orchard Rd at Parker Rd
NB I-225 offramp at Parker Rd
Denver
SB I-25 offramp at Hampden Ave
NB I-25 offramp at Hampden Ave
Lakewood
WB Colfax Ave at Indiana St
SB Indiana St at 6th Ave
Boulder
WB Arapahoe Ave at Foothills Pkwy
Loveland
EB US 34 at Centerra Pkwy
2 that have been removed:
EB Arapahoe Rd at Parker Rd (now an interchange)
SB Quebec St at MLK Blvd (now a double left)
The I-5 offramp onto Disneyland Drive (http://goo.gl/maps/AuHll) in Anaheim.
This is a triple right turn only, but whatever.
http://goo.gl/maps/T2FyE (http://goo.gl/maps/T2FyE)
US 1 SB to US 1 SB in Philadelphia.
No link for now, but the I-15 Flamingo exit here in Vegas has a triple left.
Quote from: CentralCAroadgeek on January 04, 2013, 01:04:33 PM
No link for now, but the I-15 Flamingo exit here in Vegas has a triple left.
I linked this one on page one of the thread (https://www.aaroads.com/forum/index.php?topic=4320.msg94805#msg94805).
Adding a couple other Nevada examples:
Las Vegas/Henderson - third turn lane on all is shared left/thru (for the off ramps, they're effectively left turn only lanes)
- US 95 north offramp to Cheyenne Ave WB (https://maps.google.com/?ll=36.21799,-115.245777&spn=0.002274,0.00327&t=h&z=19) (Google 45° aerials show during recent widening).
- US 95 north offramp to Durango Drive SB (https://maps.google.com/?ll=36.298806,-115.285449&spn=0.00527,0.005637&t=h°=270&z=18)
- I-515/US 93/US 95 SB offramp to Boulder Hwy (SR 582) (https://maps.google.com/?ll=36.136661,-115.090432&spn=0.002276,0.00327&t=h&z=19)
- I-515/US 93/US 95 NB offramp to Sunset Road (SR 592) (https://maps.google.com/?ll=36.063356,-115.030581&spn=0.002278,0.00327&t=h&z=19)
- Swenson St NB to Tropicana Ave WB (https://maps.google.com/?ll=36.100551,-115.145929&spn=0.001145,0.001635&t=h&z=20) (exit from McCarran Airport)
- Swenson St NB to Harmon Ave WB (https://maps.google.com/?ll=36.107831,-115.150426&spn=0.001145,0.001635&t=h&z=20) (end of one-way, also major parking exit from Thomas & Mack Center -- this one is a true triple left only)
Carson City
- Fairview Drive WB to SB Carson St (https://maps.google.com/?ll=39.149836,-119.766642&spn=0.000773,0.001635&t=h&z=20) (facilitates movement from temporary to current alignment of US 50/395)
With the "I-515/US 93/US 95 NB offramp to Sunset Road (SR 592)" example... seriously? NDOT using "ONLY" for a left+forward lane? "Only" should be reserved for lanes where only one direction of travel is permitted... tsk tsk. :P
Quote from: colinstu on January 04, 2013, 08:47:22 PM
With the "I-515/US 93/US 95 NB offramp to Sunset Road (SR 592)" example... seriously? NDOT using "ONLY" for a left+forward lane? "Only" should be reserved for lanes where only one direction of travel is permitted... tsk tsk. :P
It's an older install. NDOT has started to use the "ONLY" text much less, in favor of just additional arrows. The reconstructed off ramp at I-80 WB to Virginia St in Reno now has no fewer than *8* consecutive arrows on the pavement in each lane at the first signal without an "only" in sight...despite two lanes just going straight with no turns.
NC 210 NB to Honeycutt Road WB (http://goo.gl/maps/UAChH). The left lane was still closed the last time I was down there. That whole setup will soon qualify for that Coolest Interchanges thread I happened to have created.
Found a triple left turn in New Hampshire the other day on NH 28 just south of I-293 at the Mall of New Hampshire: http://goo.gl/maps/nMj2s
Triple lefts are pretty rare in New England.
Thanks to the distant interstate trailblazer thread I have the location of the other triple left in Illinois in Chicagoland, which is at the Stony Island/65th Place/ SB Cornell Avenue intersection:
Streetview
https://maps.google.com/maps?q=Hyde+Park,+Chicago,+IL&hl=en&ll=41.776509,-87.585948&spn=0.001195,0.002064&sll=36.988482,-89.151843&sspn=0.007276,0.016512&oq=hyde+par&hnear=Hyde+Park,+Chicago,+Cook,+Illinois&t=h&z=20&layer=c&cbll=41.776427,-87.586&panoid=s-3A5ikc-Kn6GDMUmz4KOA&cbp=12,207.39,,0,11.46 (https://maps.google.com/maps?q=Hyde+Park,+Chicago,+IL&hl=en&ll=41.776509,-87.585948&spn=0.001195,0.002064&sll=36.988482,-89.151843&sspn=0.007276,0.016512&oq=hyde+par&hnear=Hyde+Park,+Chicago,+Cook,+Illinois&t=h&z=20&layer=c&cbll=41.776427,-87.586&panoid=s-3A5ikc-Kn6GDMUmz4KOA&cbp=12,207.39,,0,11.46)
Aerial
https://maps.google.com/maps?q=Hyde+Park,+Chicago,+IL&hl=en&ll=41.776293,-87.586019&spn=0.001195,0.002064&sll=36.988482,-89.151843&sspn=0.007276,0.016512&oq=hyde+par&hnear=Hyde+Park,+Chicago,+Cook,+Illinois&t=h&z=20 (https://maps.google.com/maps?q=Hyde+Park,+Chicago,+IL&hl=en&ll=41.776293,-87.586019&spn=0.001195,0.002064&sll=36.988482,-89.151843&sspn=0.007276,0.016512&oq=hyde+par&hnear=Hyde+Park,+Chicago,+Cook,+Illinois&t=h&z=20)
Looks like a triple left was recently added for the NB US 169 exit to Bren Road/Londonderry Road in the Minneapolis suburbs:
https://maps.google.com/maps?q=Minneapolis,+MN&hl=en&ll=44.898694,-93.400466&spn=0.000803,0.002064&sll=39.15276,-76.730761&sspn=0.001701,0.004128&oq=minn&t=h&hnear=Minneapolis,+Hennepin,+Minnesota&z=20 (https://maps.google.com/maps?q=Minneapolis,+MN&hl=en&ll=44.898694,-93.400466&spn=0.000803,0.002064&sll=39.15276,-76.730761&sspn=0.001701,0.004128&oq=minn&t=h&hnear=Minneapolis,+Hennepin,+Minnesota&z=20)
Another triple left in Gilroy, Arroyo Circle at Leavesley Road. (http://goo.gl/maps/TppEm) Not quite a triple-left only, since the far right left only lane is an option lane.
While I was exploring I-278 in New York City a week or two ago, I stumbled on this (http://maps.google.com/maps?ll=40.770148,-73.91665&spn=0.000951,0.00142&t=h&z=20) triple left turn. If you unckeck 45º view, you get older imagery that has a quadruple left turn.
Quote from: Michael on February 27, 2013, 06:24:10 PM
While I was exploring I-278 in New York City a week or two ago, I stumbled on this (http://maps.google.com/maps?ll=40.770148,-73.91665&spn=0.000951,0.00142&t=h&z=20) triple left turn. If you unckeck 45º view, you get older imagery that has a quadruple left turn.
Posted that one back in Sept. https://www.aaroads.com/forum/index.php?topic=4320.msg171741#msg171741
Just spied a triple left turn lane on Indian Head Hwy (MD 210) at MD 228. Also home to a three way CFI that I never knew was there.
http://goo.gl/maps/knoNg
In Montgomery County, Maryland:
Northbound Md. 355 (North Frederick Avenue) at Md. 124 (Montgomery Village Avenue) in the City of Gaithersburg here (https://maps.google.com/maps?q=gaithersburg+md&hl=en&ll=39.151972,-77.211155&spn=0.001171,0.002411&sll=39.129369,-77.164584&sspn=0.001163,0.002411&t=h&hnear=Gaithersburg,+Montgomery,+Maryland&z=19&layer=c&cbll=39.151909,-77.211076&panoid=Eq8Fw7uDmuNOyDey6yjb3g&cbp=12,315.14,,0,21.02).
Nearby, Southbound (compass westbound) Md. 124 (Midcounty Highway) approaching Montgomery Village Avenue here (https://maps.google.com/maps?q=gaithersburg+md&hl=en&ll=39.159896,-77.200809&spn=0.001171,0.002411&sll=39.129369,-77.164584&sspn=0.001163,0.002411&t=h&hnear=Gaithersburg,+Montgomery,+Maryland&z=19&layer=c&cbll=39.159896,-77.200809&panoid=8Fe89j8manz9brO9IFOe4Q&cbp=12,303.37,,0,10.01).
In the City of Rockville, eastbound East Gude Drive approaching Md. 28 (Norbeck Road) here (https://maps.google.com/maps?q=rockville+md+20850&hl=en&ll=39.090534,-77.129431&spn=0.009376,0.01929&sll=39.09055,-77.129431&sspn=0.009376,0.01929&t=h&gl=us&hnear=Rockville,+Montgomery,+Maryland&z=16&layer=c&cbll=39.090551,-77.129426&panoid=7uyCfK5Zxh7TKxogUG3JwQ&cbp=12,156.17,,0,12.81).
Carroll County:
City of Westminster, northbound Md. 97 (Malcolm Drive) approaching Md. 140 (Baltimore Boulevard/Westminster Bypass) is two left turn lanes and a third lane is left or straight ahead here (https://maps.google.com/maps?q=Westminster,+Carroll,+Maryland&hl=en&ll=39.564119,-76.974563&spn=0.000582,0.001206&sll=39.404203,-76.951241&sspn=0.000579,0.001206&t=h&gl=us&geocode=FVPfWwIdGSNp-w&hnear=Westminster,+Carroll,+Maryland&z=20).
Former US 29 (Old Columbia Pike) has 2 and a half left turning lanes at Sandy Spring Rd (MD 198) before it merges back onto US 29.
http://goo.gl/maps/XYZbe
http://goo.gl/maps/WGrZm (http://goo.gl/maps/WGrZm)
Here's a rare setup: triple-right, then triple-left!
Quote from: Roadsguy on March 22, 2013, 11:17:07 PM
http://goo.gl/maps/WGrZm (http://goo.gl/maps/WGrZm)
Here's a rare setup: triple-right, then triple-left!
The "triple-right" has right arrows painted on it, but I don't know I personally would consider it a turn, since it's the only movement permitted, it's a straight thru on a curve.
In some ways the left is kind of similar as well..... That whole series of intersections is pretty weird. Curiosity got the better of me, and I had to use GSV to find out it's a Wendy's that's locked into the whole mess.
I-40 Westbound exit ramp at Wendover Avenue (https://maps.google.com/maps?hl=en&ll=36.056478,-79.890658&spn=0.001794,0.002411&sll=27.698638,-83.804601&sspn=11.365986,19.753418&oq=wendover+a&hnear=W+Wendover+Ave,+Greensboro,+North+Carolina&t=h&z=19), in Greensboro, NC.
http://goo.gl/maps/x1mNL
Quote from: Mr_Northside on March 24, 2013, 02:39:14 PM
Quote from: Roadsguy on March 22, 2013, 11:17:07 PM
http://goo.gl/maps/WGrZm (http://goo.gl/maps/WGrZm)
Here's a rare setup: triple-right, then triple-left!
The "triple-right" has right arrows painted on it, but I don't know I personally would consider it a turn, since it's the only movement permitted, it's a straight thru on a curve.
In some ways the left is kind of similar as well..... That whole series of intersections is pretty weird. Curiosity got the better of me, and I had to use GSV to find out it's a Wendy's that's locked into the whole mess.
My problem with the triple-left isn't that it's a "straight thru on a curve" the way the triple-right is. It's that it's not a
triple left. It's a single hard left onto one street, plus a double soft left onto another street.
Found another triple right turn lane in the Buckhead section of Atlanta
https://maps.google.com/maps?q=Buckhead+GA&hl=en&ll=33.849216,-84.373828&spn=0.001679,0.002411&sll=40.000557,-75.267447&sspn=0.139126,0.308647&t=h&hnear=Buckhead&z=19&layer=c&cbll=33.84929,-84.373754&panoid=7mBseDrlR1QyaXMOH31DLg&cbp=12,211.19,,0,13.92
Why does the far right lane go through a "porkchop" ramp, while the other two right-turn lanes go through the light?
Because the right lane has "continuous right turn with caution". Those are almost always separated from additional right turn lanes, but only sometimes with a raised island.
Quote from: vtk on April 16, 2013, 10:17:02 AM
Because the right lane has "continuous right turn with caution". Those are almost always separated from additional right turn lanes, but only sometimes with a raised island.
There are a bunch of those in the area with a small "island" between the two turn lanes. The right most turn lane is accompanied by a sign saying "Keep Moving" (as in that lane is not controlled by a signal).
I haven't yet found a triple single direction turn anywhere in Cincinnati that wasn't a one way. A one way example exists on southbound Plum Street at 6th in downtown, where the Convention Center effectively "breaks" Plum Street.
Lots of them on Maryland's surface-expressways:
-MD 210/MD 228 (https://maps.google.com/?ll=38.66534,-77.01736&spn=0.001217,0.002642&t=k&z=19)
-US 301/MD 5 (http://goo.gl/maps/3JBeM)
-MD 90/MD 528 (https://maps.google.com/?ll=38.384921,-75.066399&spn=0.002443,0.005284&t=k&z=18) (not quite only, but most traffic turns left)]
-Probably a lot more that I'm forgetting. :P
In Costa Mesa Ca the intersection of Newport Beach Blvd and 17th Street. The EB side of the 17th Street has the triple left turn lanes.
Newport Blvd
Costa Mesa, CA 92627
http://goo.gl/maps/HxXyB
Quote from: Roadsguy on April 16, 2013, 08:06:02 AM
Why does the far right lane go through a "porkchop" ramp, while the other two right-turn lanes go through the light?
If you look on StreetView, there is a sign reading "RIGHT LANE PRIVATE DRIVE ONLY". That right turn lane becomes a right turn only lane around the corner.
Federal Way, WA. SR 18 West, left towards Kits Corner Road: http://goo.gl/SrYT6O
Peters Rd to Cedar Bluff Rd in Knoxville. But, rightmost lane is for I-40 East; center lane is for I-40 West; left lane is for Cedar Bluff Rd. northbound.
There are many cheaters though.
Maybe it shouldn't count. Rightmost lane is also for staying on Peters Rd, as well as Cedar Bluff Rd. southbound.
How about dedicated triple lefts at ALL 4 legs of the intersection! I mentioned this Pasco, FL intersection in the "longest crosswalk in America" thread as well:
https://maps.google.com/?ll=28.185823,-82.353538&spn=0.000962,0.001206&t=h&z=20
Quote from: tradephoric on January 24, 2014, 11:14:36 AM
How about dedicated triple lefts at ALL 4 legs of the intersection! I mentioned this Pasco, FL intersection in the "longest crosswalk in America" thread as well:
https://maps.google.com/?ll=28.185823,-82.353538&spn=0.000962,0.001206&t=h&z=20
With that many lefts being made, I wonder if some other solution was considered, like a roundabout or grade separation?
Quote from: cpzilliacus on January 24, 2014, 06:48:30 PM
With that many lefts being made, I wonder if some other solution was considered, like a roundabout or grade separation?
Bahaha. It's Floridian sprawl.
MA 16 / MA 28
In the left side of the picture, you see 3 left arrows. This is definitely an example.
On the right, you see three lanes that say "TO SB 28". I'm not sure if these are forced lefts though.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fmaps.googleapis.com%2Fmaps%2Fapi%2Fstaticmap%3Fcenter%3D42.404762%2C-71.081477%26amp%3Bzoom%3D19%26amp%3Bsize%3D400x400%26amp%3Bsensor%3Dfalse%26amp%3Bmaptype%3Dsatellite&hash=0a6e27b848a46e555a03fe7d2092de1f0e91327b)
Quote from: cpzilliacus on January 24, 2014, 06:48:30 PM
Quote from: tradephoric on January 24, 2014, 11:14:36 AM
How about dedicated triple lefts at ALL 4 legs of the intersection! I mentioned this Pasco, FL intersection in the "longest crosswalk in America" thread as well:
https://maps.google.com/?ll=28.185823,-82.353538&spn=0.000962,0.001206&t=h&z=20
With that many lefts being made, I wonder if some other solution was considered, like a roundabout or grade separation?
The current configuration (two intersecting 6-lane roads) wouldn't be a good candidate for a roundabout. According to FDOT, the intersection has an AADT of 51,200. There are roundabouts in America that have AADT's greater than 50,000, but they are rare.
From FHWA:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fsafety.fhwa.dot.gov%2Fintersection%2Froundabouts%2Ffhwasa10006%2Fimages%2Ff5.jpg&hash=cdbc328490011fa47f03286dd26a3d4d85584fb5)
Quote from: 1 on January 24, 2014, 07:44:11 PM
MA 16 / MA 28
In the left side of the picture, you see 3 left arrows. This is definitely an example.
On the right, you see three lanes that say "TO SB 28". I'm not sure if these are forced lefts though.
You do realize those are the exact same lanes?
Quote from: NE2 on January 24, 2014, 07:17:20 PM
Quote from: cpzilliacus on January 24, 2014, 06:48:30 PM
With that many lefts being made, I wonder if some other solution was considered, like a roundabout or grade separation?
Bahaha. It's Floridian sprawl.
So make a SPUI with one of the roads acting like a freeway for a half mile, like all over St Pete.
Or, to preserve the apparent near-symmetry of capacities, how about a single-point windmill interchange? I'd say go full volleyball but three levels seems unprecedented for two surface boulevards in Florida.
I-49 at MO 150, (https://maps.google.com/maps?hl=en&ll=38.858013,-94.527665&spn=0.001865,0.004128&t=h&z=19) world's only SPUI with any triple left movements?
Quote from: Revive 755 on March 10, 2014, 09:46:20 PM
I-49 at MO 150, (https://maps.google.com/maps?hl=en&ll=38.858013,-94.527665&spn=0.001865,0.004128&t=h&z=19) world's only SPUI with any triple left movements?
Nope. http://www.ite.org/Membersonly/annualmeeting/1996/AIA96C89.pdf
Quote from: Revive 755 on March 10, 2014, 09:46:20 PM
I-49 at MO 150, (https://maps.google.com/maps?hl=en&ll=38.858013,-94.527665&spn=0.001865,0.004128&t=h&z=19) world's only SPUI with any triple left movements?
ODOT just built one in Grove City last year. I-71 at OH 665.
Quote from: NE2 on March 10, 2014, 09:56:38 PM
Quote from: Revive 755 on March 10, 2014, 09:46:20 PM
I-49 at MO 150, (https://maps.google.com/maps?hl=en&ll=38.858013,-94.527665&spn=0.001865,0.004128&t=h&z=19) world's only SPUI with any triple left movements?
Nope. http://www.ite.org/Membersonly/annualmeeting/1996/AIA96C89.pdf
Need I list the Australian SPUIs with triple rights?
- Eastlink M3 @ Springvale (Melbourne) (http://goo.gl/xe8xwI)
- Westlink M7 @ Sunnyholt (Sydney) (http://goo.gl/PZ61Vc)
- East-West Arterial Rd @ Sandgate (Brisbane) (http://goo.gl/CmbNuE)
- East-West Arterial Rd @ Southern Cross Way (Brisbane) (http://goo.gl/j7kisB)
Honestly, Australia really took the SPUI to the next level. Triple turn movements, bus lanes running through them, second sets of stop lights for the slip lanes...I know they didn't invent the SPUI but you wouldn't know that by how many there are.
Found a third one in Chicagoland: Streeter Drive at Grand Avenue just west of Navy Pier:
https://maps.google.com/maps?hl=en&ll=41.891832,-87.611369&spn=0.001261,0.002064&t=h&z=20 (https://maps.google.com/maps?hl=en&ll=41.891832,-87.611369&spn=0.001261,0.002064&t=h&z=20)
FDOT is beginning to kick them into the South Florida area, not to mention several already around the state that I've seen.
In Miami-Dade county: Bird Rd to SB 826/874
Coming soon: Flagler Street to both directions of 826!
Naples: One at Golden Gate Pkwy just shy of the high school going west
Naples: all along the concurrent section of 84/951, and on 951 at one of the major roads, I forget which one.
And there are triple rights, which could act as triple lefts, on controlled loop ramps from I-75 to Pines Blvd
This intersection in NYC, where 495 ends and meets 9A (West St.), features 4 Right turn lanes and 3 Left turn lanes. http://goo.gl/maps/0iBUK
There is a pair of triple left turn only lanes proposed for the Algonquin Road legs of the Randall Road/Algonquin Road intersection in McHenry County, Illinois.
See Page 3 of this exhibit (http://www.randallroad.info/uploads/3/3/2/5/3325720/exhibit_a.pdf)
Quote from: Revive 755 on September 30, 2014, 08:25:27 PM
There is a pair of triple left turn only lanes proposed for the Algonquin Road legs of the Randall Road/Algonquin Road intersection in McHenry County, Illinois.
See Page 3 of this exhibit (http://www.randallroad.info/uploads/3/3/2/5/3325720/exhibit_a.pdf)
Fuck, at that point just knock it off and put in some Michigan Lefts.
Quote from: Revive 755 on September 30, 2014, 08:25:27 PM
There is a pair of triple left turn only lanes proposed for the Algonquin Road legs of the Randall Road/Algonquin Road intersection in McHenry County, Illinois.
See Page 3 of this exhibit (http://www.randallroad.info/uploads/3/3/2/5/3325720/exhibit_a.pdf)
The road width suggests to me that the diagram is actually of an intersection in Florida.
Quote from: jake on October 01, 2014, 03:59:15 AM
Quote from: Revive 755 on September 30, 2014, 08:25:27 PM
There is a pair of triple left turn only lanes proposed for the Algonquin Road legs of the Randall Road/Algonquin Road intersection in McHenry County, Illinois.
See Page 3 of this exhibit (http://www.randallroad.info/uploads/3/3/2/5/3325720/exhibit_a.pdf)
The road width suggests to me that the diagram is actually of an intersection in Florida.
Huh? Only Florida has roads 8 lanes wide with turn lanes? That'll be news to nearly every other state, territory, province and country in the world.
I can think of at least one in northern Miami-Dade County
Exit ramp from SB I-95 to Ives Dairy Road there are three left turn only lanes to go east.
https://www.google.com/maps/@25.9646402,-80.1662289,103m/data=!3m1!1e3
Additionally, here are two intersections with three left turn lanes (though one of them can go straight)
Northbound Highland Lakes BLVD has 3 left turn lanes to go west on Ives Dairy Road
https://www.google.com/maps/@25.9627408,-80.1621548,103m/data=!3m1!1e3?hl=en
Eastbound Miami Gardens Dr (FL 860) has 3 left turn lanes to go north on US1
https://www.google.com/maps/@25.9473142,-80.1472334,103m/data=!3m1!1e3
I'm sure there are others in South Florida, but those are the ones i could think of off the top of my head.
Quote from: jeffandnicole on October 01, 2014, 08:30:47 AM
Quote from: jake on October 01, 2014, 03:59:15 AM
Quote from: Revive 755 on September 30, 2014, 08:25:27 PM
There is a pair of triple left turn only lanes proposed for the Algonquin Road legs of the Randall Road/Algonquin Road intersection in McHenry County, Illinois.
See Page 3 of this exhibit (http://www.randallroad.info/uploads/3/3/2/5/3325720/exhibit_a.pdf)
The road width suggests to me that the diagram is actually of an intersection in Florida.
Huh? Only Florida has roads 8 lanes wide with turn lanes? That'll be news to nearly every other state, territory, province and country in the world.
My comment was a poor attempt at humour. You probably don't know this, but I come from an area where four through lanes is absolutely nuts, let alone a three left turn lanes. The state that I often (mockingly) associate with wide roads is Florida.
Quote from: jake on October 01, 2014, 12:59:06 PM
Quote from: jeffandnicole on October 01, 2014, 08:30:47 AM
Quote from: jake on October 01, 2014, 03:59:15 AM
Quote from: Revive 755 on September 30, 2014, 08:25:27 PM
There is a pair of triple left turn only lanes proposed for the Algonquin Road legs of the Randall Road/Algonquin Road intersection in McHenry County, Illinois.
See Page 3 of this exhibit (http://www.randallroad.info/uploads/3/3/2/5/3325720/exhibit_a.pdf)
The road width suggests to me that the diagram is actually of an intersection in Florida.
Huh? Only Florida has roads 8 lanes wide with turn lanes? That'll be news to nearly every other state, territory, province and country in the world.
My comment was a poor attempt at humour. You probably don't know this, but I come from an area where four through lanes is absolutely nuts, let alone a three left turn lanes. The state that I often (mockingly) associate with wide roads is Florida.
Except, as Kacie Jane points out one page 1 of this thread, you do have a triple left turn lane near your area:
Quote from: Kacie Jane on March 22, 2011, 09:40:26 PM
The ramp from I-5 southbound at SR 512 has one. The interchange used to be a full cloverleaf, but the SB-EB movement moved to a traffic signal about a decade ago. Google Maps (http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Lakewood,+WA&aq=&sll=35.317366,-95.625&sspn=56.353561,158.027344&ie=UTF8&hq=&hnear=Lakewood,+Pierce,+Washington&ll=47.163619,-122.481916&spn=0.005865,0.01929&t=h&z=16)
I remember reading a newspaper article - probably somewhere between 2 and 5 years ago - saying that one and a then-brand new one on or near SR 410 in the Sumner/Buckley/Enumclaw area were the only ones in the state, but I don't recall exactly where that one is.
Quote from: jeffandnicole on October 01, 2014, 01:20:08 PM
Quote from: jake on October 01, 2014, 12:59:06 PM
Quote from: jeffandnicole on October 01, 2014, 08:30:47 AM
Quote from: jake on October 01, 2014, 03:59:15 AM
Quote from: Revive 755 on September 30, 2014, 08:25:27 PM
There is a pair of triple left turn only lanes proposed for the Algonquin Road legs of the Randall Road/Algonquin Road intersection in McHenry County, Illinois.
See Page 3 of this exhibit (http://www.randallroad.info/uploads/3/3/2/5/3325720/exhibit_a.pdf)
The road width suggests to me that the diagram is actually of an intersection in Florida.
Huh? Only Florida has roads 8 lanes wide with turn lanes? That'll be news to nearly every other state, territory, province and country in the world.
My comment was a poor attempt at humour. You probably don't know this, but I come from an area where four through lanes is absolutely nuts, let alone a three left turn lanes. The state that I often (mockingly) associate with wide roads is Florida.
Except, as Kacie Jane points out one page 1 of this thread, you do have a triple left turn lane near your area:
Quote from: Kacie Jane on March 22, 2011, 09:40:26 PM
The ramp from I-5 southbound at SR 512 has one. The interchange used to be a full cloverleaf, but the SB-EB movement moved to a traffic signal about a decade ago. Google Maps (http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Lakewood,+WA&aq=&sll=35.317366,-95.625&sspn=56.353561,158.027344&ie=UTF8&hq=&hnear=Lakewood,+Pierce,+Washington&ll=47.163619,-122.481916&spn=0.005865,0.01929&t=h&z=16)
I remember reading a newspaper article - probably somewhere between 2 and 5 years ago - saying that one and a then-brand new one on or near SR 410 in the Sumner/Buckley/Enumclaw area were the only ones in the state, but I don't recall exactly where that one is.
Yes, and as I point out on the last page, there's another one in Federal Way:
Quote from: jake on January 11, 2014, 11:59:29 PM
Federal Way, WA. SR 18 West, left towards Kits Corner Road: http://goo.gl/SrYT6O
I'm not suggesting (at least intentionally) that there aren't any triple-lefts. I'm saying they're rare, and in comparison to Florida (which, to me, seems to have plenty), we have so few, that some people north in Snohomish or Skagit counties probably have never seen one, and to them, a triple-left is in fact
unheard of mythical.
I'm now interested to see if the Vancovuer (BC) area has any.
Quote from: jdb1234 on March 22, 2011, 05:28:11 PM
There are 2 I can think of in Birmingham, one is at Riverchase Parkway @ Valleydale Rd, the other is at Summitt Blvd @ US 280.
Since this post, there was a project to improve flow on 280 - http://aldotapps.dot.state.al.us/US280/doc/280%20Access%20Management.pdf (http://aldotapps.dot.state.al.us/US280/doc/280%20Access%20Management.pdf).
As you can see in the link, this created additional triple lefts onto US 280 at...
Rocky Ridge Rd
Dolly Ridge Rd
Inverness Pkwy
SYNCHRO models of Bruce Browns Blvd and Florida 56 (both have the same upstream geometry and traffic volumes):
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi478.photobucket.com%2Falbums%2Frr144%2Ftradephoric%2FTransportation%2520Pictures%2FCrosswalks%2FFlorida3-lane_zps131a2aca.jpg&hash=b114178c295fd3a5ceaac6d78284b9d992329815) (http://s478.photobucket.com/user/tradephoric/media/Transportation%20Pictures/Crosswalks/Florida3-lane_zps131a2aca.jpg.html)
https://www.google.com/maps/@28.185609,-82.3535353,339m/data=!3m1!1e3
The triple left turn model runs a 200 second cycle length with pedestrian crossings up to 225 feet. A long cycle is needed to satisfy the pedestrian interval requirements found in the MUTCD. The Median U-turn model runs an 80 second cycle length with short pedestrian crossings. It's a simple 2-phase intersection that maximizes throughput.
Multiple left turn lanes aren't always the answer to maximize throughput.
If you are able to view the Mummers Parade in Philly today, you get a great look at Philly's quadruple right on Market Street at City Hall, which is where the TV broadcast takes place.
Quote from: tradephoric on October 04, 2014, 08:35:28 PM
SYNCHRO models of Bruce Browns Blvd and Florida 56 (both have the same upstream geometry and traffic volumes):
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi478.photobucket.com%2Falbums%2Frr144%2Ftradephoric%2FTransportation%2520Pictures%2FCrosswalks%2FFlorida3-lane_zps131a2aca.jpg&hash=b114178c295fd3a5ceaac6d78284b9d992329815) (http://s478.photobucket.com/user/tradephoric/media/Transportation%20Pictures/Crosswalks/Florida3-lane_zps131a2aca.jpg.html)
https://www.google.com/maps/@28.185609,-82.3535353,339m/data=!3m1!1e3
The triple left turn model runs a 200 second cycle length with pedestrian crossings up to 225 feet. A long cycle is needed to satisfy the pedestrian interval requirements found in the MUTCD. The Median U-turn model runs an 80 second cycle length with short pedestrian crossings. It's a simple 2-phase intersection that maximizes throughput.
Multiple left turn lanes aren't always the answer to maximize throughput.
If it gets to the point where you need more than a double left and the road requiring such a left isn't one-way, you should be considering something other than standard turn treatment. The current setup has an 11-lane cross section on its widest approach with no refuge island. As you said, the cycle length is excessive, as clear time is needed in addition to the long pedestrian interval. Assuming a pedestrian speed of 2.5 mph (conservative estimate for walking speed if there are a significant amount of elderly users), the
minimum clear pedestrian interval is 62 seconds. While the median U-turn proposal only produces a slight reduction of lanes at the intersection, a refuge island will allow the pedestrian interval to be halved. Additionally, as there are fewer phases at the intersection, there's less lost time built into the cycle.
If you have the space for a triple left turn, you almost certainly have the space for a median U-turn, which is almost always a better option, especially if two are opposing, as in this case.
Quote from: tradephoric on October 04, 2014, 08:35:28 PM
The triple left turn model runs a 200 second cycle length with pedestrian crossings up to 225 feet. A long cycle is needed to satisfy the pedestrian interval requirements found in the MUTCD. The Median U-turn model runs an 80 second cycle length with short pedestrian crossings. It's a simple 2-phase intersection that maximizes throughput.
Few nitpicks:
1) Many traffic signals run much shorter phases when there are no pedestrian calls, and only run the super-long ped phase when a pedestrian pushes the ped button or the button jams.
2) I would assume that one of those roads there has the signals coordinated which would probably require some other cycle length than the one that optimizes the intersection in question?
3) It appears many of the u-turning vehicles are not proceeding to turn right when they return to the main intersection. I hear that Synchro/Simtraffic is not as good as VISSIM in handling this, but I would be curious to see how this changes the right turn queues.
Quote from: Revive 755 on January 01, 2015, 10:47:08 PM
1) Many traffic signals run much shorter phases when there are no pedestrian calls, and only run the super-long ped phase when a pedestrian pushes the ped button or the button jams.
Let's assume, based on the vehicle demands, the signal could run a 120 second cycle length when there are no pedestrian calls. This cycle length may provide perfect "green to green" coordination with the surrounding signal (which in this case is 1500 feet to the south at Williamsburg Drive). What happens when a pedestrian actuation occurs? Instead of running a 120 second cycle, the signal would need to run a 200 second cycle just to fit the pedestrian intervals and the once perfect coordination turns 180 out. It's not a great option when the coordination of a corridor is dependent on whether a pedestrian actuates a pushbutton.
Quote from: Revive 755 on January 01, 2015, 10:47:08 PM
2) I would assume that one of those roads there has the signals coordinated which would probably require some other cycle length than the one that optimizes the intersection in question?
The intersection being modeled, which includes triple left turn lanes at all 4-legs, would likely be the critical intersection within the zone. There is no doubt that the optimized cycle length of the critical intersection may not match the optimal cycle length of the surrounding intersections (which could very well run shorter cycle lengths). A determination would need to be made whether the surrounding signals would benefit from coordinating to the critical intersection or if they should run isolated.
Quote from: Revive 755 on January 01, 2015, 10:47:08 PM
3) It appears many of the u-turning vehicles are not proceeding to turn right when they return to the main intersection. I hear that Synchro/Simtraffic is not as good as VISSIM in handling this, but I would be curious to see how this changes the right turn queues.
I don't put that much stock in any model to be honest. Synchro does have a tough time accurately modeling the intersection paths and some quirky things can be seen when tracking individual vehicles. That said, there are several real world examples of Michigan left corridors that efficiently run at low cycle lengths during the main rush hours without much right turning queue issues.
Quote from: tradephoric on January 02, 2015, 10:31:48 AM
Quote from: Revive 755 on January 01, 2015, 10:47:08 PM
3) It appears many of the u-turning vehicles are not proceeding to turn right when they return to the main intersection. I hear that Synchro/Simtraffic is not as good as VISSIM in handling this, but I would be curious to see how this changes the right turn queues.
I don't put that much stock in any model to be honest. Synchro does have a tough time accurately modeling the intersection paths and some quirky things can be seen when tracking individual vehicles. That said, there are several real world examples of Michigan left corridors that efficiently run at low cycle lengths during the main rush hours without much right turning queue issues.
VISSIM is better at modeling vehicle paths, because in order to run the model you have to define all the vehicle paths in the modeled network. With Synchro you just build the network and SimTraffic interprets it, although there are ways to reduce abnormal and unlikely vehicle paths.
Quote from: roadfro on January 02, 2015, 01:49:18 PM
Quote from: tradephoric on January 02, 2015, 10:31:48 AM
Quote from: Revive 755 on January 01, 2015, 10:47:08 PM
3) It appears many of the u-turning vehicles are not proceeding to turn right when they return to the main intersection. I hear that Synchro/Simtraffic is not as good as VISSIM in handling this, but I would be curious to see how this changes the right turn queues.
I don't put that much stock in any model to be honest. Synchro does have a tough time accurately modeling the intersection paths and some quirky things can be seen when tracking individual vehicles. That said, there are several real world examples of Michigan left corridors that efficiently run at low cycle lengths during the main rush hours without much right turning queue issues.
VISSIM is better at modeling vehicle paths, because in order to run the model you have to define all the vehicle paths in the modeled network. With Synchro you just build the network and SimTraffic interprets it, although there are ways to reduce abnormal and unlikely vehicle paths.
Having experience with both, I agree completely. Synchro is relatively easy to set up (especially for the novice user), but there are quite a few interesting paths. For one class this past semester, I modeled a roundabout in Synchro and there were a bunch of U-turns that don't currently happen, even though I plugged in traffic counts. Is it good for simplistic cases, such as a "traditional" intersection between 2 single carriageways? Yes. But not for much more.
Quote from: cl94 on January 02, 2015, 03:34:10 PM
Having experience with both, I agree completely. Synchro is relatively easy to set up (especially for the novice user), but there are quite a few interesting paths. For one class this past semester, I modeled a roundabout in Synchro and there were a bunch of U-turns that don't currently happen, even though I plugged in traffic counts. Is it good for simplistic cases, such as a "traditional" intersection between 2 single carriageways? Yes. But not for much more.
Yeah, there is a way to prevent things like this. I had to model a small grid for a traffic class a few years ago (I-80 at Exit 13/Virginia St in downtown Reno) and had similar issues--one car going forward at Virginia/Maple and making three consecutive left turns in a maneuver that ultimately had the same origin/destination result as if the car had just taken a right at Virginia/Maple. Our instructor pointed this out and showed us an adjustment that prevented (most of) these random movements from occurring--I haven't played with Synchro for quite some time, so I forget the exact setting...but probably documented that somewhere in the project write-up.
I just remembered one close to where I live.
http://goo.gl/maps/fGLXJ
Satellite
http://goo.gl/maps/t1YW4
Not sure why its a triple turn, there's not much there except fields, my old high school, and a city park.
Quote from: SignGeek101 on January 15, 2015, 11:16:48 PM
I just remembered one close to where I live.
http://goo.gl/maps/fGLXJ
Satellite
http://goo.gl/maps/t1YW4
Not sure why its a triple turn, there's not much there except fields, my old high school, and a city park.
That intersection has a lot of interesting features. Triple left turn, ugly BGSs, etc.
It's not a pure triple left turn only, but Northbound Schuetz Road at Page Avenue in St. Louis County, Missouri has been widened to have a dual left, a shared thru-left, and a dedicated right turn lane. Streetview (https://goo.gl/maps/nR11Ch7v3oD2)
Quote from: Revive 755 on August 15, 2018, 10:34:35 PM
It's not a pure triple left turn only, but Northbound Schuetz Road at Page Avenue in St. Louis County, Missouri has been widened to have a dual left, a shared thru-left, and a dedicated right turn lane. Streetview (https://goo.gl/maps/nR11Ch7v3oD2)
I was going to complain about the lack of a second through signal, but GSV shows that setup in place since before 2008, before the requirement for two through heads for all straight movements came about (2009 MUTCD).
Got one at Connecticut Av (MD 185) at Georgia Av (MD 97) near Aspen Hill.
https://goo.gl/maps/TJtk7dm8Efo
Quote from: kj3400 on August 16, 2018, 02:45:58 AM
Got one at Connecticut Av (MD 185) at Georgia Av (MD 97) near Aspen Hill.
https://goo.gl/maps/TJtk7dm8Efo
Wasn't sure how many there were in the Northeast. Nice find!
Quote from: jeffandnicole on March 31, 2014, 08:26:24 AM
This intersection in NYC, where 495 ends and meets 9A (West St.), features 4 Right turn lanes and 3 Left turn lanes. http://goo.gl/maps/0iBUK
Apologies for quoting such an old post.
That right turn is a bit odd. There are four right turn lanes, but only three through lanes. Sounds like a very New York-ish situation (where lanes are suggestions, IIRC).
Quote from: Revive 755 on March 22, 2014, 10:49:08 PM
Found a third one in Chicagoland: Streeter Drive at Grand Avenue just west of Navy Pier:
https://maps.google.com/maps?hl=en&ll=41.891832,-87.611369&spn=0.001261,0.002064&t=h&z=20 (https://maps.google.com/maps?hl=en&ll=41.891832,-87.611369&spn=0.001261,0.002064&t=h&z=20)
This one has been removed since this posting. Not sure why.
Vista Ave and Capitol Blvd in Boise, ID: https://goo.gl/maps/reTqj2Lbxgw
There is no through movement, but it is still definitely a triple left.
This one almost counts so I'll post it, since it's the only other triple turn I can think of in the area. Idaho St and 16th St. The far right lane is a straight/left option lane. https://goo.gl/maps/PAAM6Q12MaD2
I was going to post the one on WA-18 in Federal Way since I drove through it last week, but Jakeroot already did.
Quote from: jakeroot on October 01, 2014, 01:31:49 PM
Quote from: jeffandnicole on October 01, 2014, 01:20:08 PM
Quote from: jake on October 01, 2014, 12:59:06 PM
Quote from: jeffandnicole on October 01, 2014, 08:30:47 AM
Quote from: jake on October 01, 2014, 03:59:15 AM
Quote from: Revive 755 on September 30, 2014, 08:25:27 PM
There is a pair of triple left turn only lanes proposed for the Algonquin Road legs of the Randall Road/Algonquin Road intersection in McHenry County, Illinois.
See Page 3 of this exhibit (http://www.randallroad.info/uploads/3/3/2/5/3325720/exhibit_a.pdf)
The road width suggests to me that the diagram is actually of an intersection in Florida.
Huh? Only Florida has roads 8 lanes wide with turn lanes? That'll be news to nearly every other state, territory, province and country in the world.
My comment was a poor attempt at humour. You probably don't know this, but I come from an area where four through lanes is absolutely nuts, let alone a three left turn lanes. The state that I often (mockingly) associate with wide roads is Florida.
Except, as Kacie Jane points out one page 1 of this thread, you do have a triple left turn lane near your area:
Quote from: Kacie Jane on March 22, 2011, 09:40:26 PM
The ramp from I-5 southbound at SR 512 has one. The interchange used to be a full cloverleaf, but the SB-EB movement moved to a traffic signal about a decade ago. Google Maps (http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Lakewood,+WA&aq=&sll=35.317366,-95.625&sspn=56.353561,158.027344&ie=UTF8&hq=&hnear=Lakewood,+Pierce,+Washington&ll=47.163619,-122.481916&spn=0.005865,0.01929&t=h&z=16)
I remember reading a newspaper article - probably somewhere between 2 and 5 years ago - saying that one and a then-brand new one on or near SR 410 in the Sumner/Buckley/Enumclaw area were the only ones in the state, but I don't recall exactly where that one is.
Yes, and as I point out on the last page, there's another one in Federal Way:
Quote from: jake on January 11, 2014, 11:59:29 PM
Federal Way, WA. SR 18 West, left towards Kits Corner Road: http://goo.gl/SrYT6O
I'm not suggesting (at least intentionally) that there aren't any triple-lefts. I'm saying they're rare, and in comparison to Florida (which, to me, seems to have plenty), we have so few, that some people north in Snohomish or Skagit counties probably have never seen one, and to them, a triple-left is in fact unheard of mythical.
I'm now interested to see if the Vancovuer (BC) area has any.
There's two intersections I know of in the Vancouver area that
sort of count (two left turn only lanes and a left / through lane):
https://www.google.com/maps/@49.2300177,-122.689431,3a,45.5y,356.47h,88.26t/data=!3m6!1e1!3m4!1sb7Kw2ZqfSEw6ck8X2scGiA!2e0!7i13312!8i6656
https://www.google.com/maps/@49.0901466,-123.0576636,3a,42.6y,90.96h,89.74t/data=!3m6!1e1!3m4!1sTRoOCTh62WlDGSJtXNcitg!2e0!7i13312!8i6656?hl=en
It looks like they never updated the signals after changing the lane configuration at both locations :-|.
There
was a real triple left turn but it was removed a few years ago when they built an interchange:
https://www.google.ca/maps/@49.228272,-122.8193543,3a,39.4y,201.91h,89.3t/data=!3m7!1e1!3m5!1slFUYcV6650j4ANF0KReMgQ!2e0!5s20110801T000000!7i13312!8i6656 (2009 Streetview link)
I can think of three off the top of my head in Utah, but I know there are more:
Harrison Blvd at US 89, Ogden (https://goo.gl/maps/n1BFAv4zK6p)
Riverdale Rd at 1900 West, Roy (https://goo.gl/maps/TB2813Up1SS2)
Bluff St at Sunset Blvd, St. George (https://goo.gl/maps/PxPBJgNH5iR2)
Quote from: bcroadguy on August 18, 2018, 05:30:47 AM
Quote from: jakeroot on October 01, 2014, 01:31:49 PM
I'm now interested to see if the Vancovuer (BC) area has any.
There's two intersections I know of in the Vancouver area that sort of count (two left turn only lanes and a left / through lane):
https://www.google.com/maps/@49.2300177,-122.689431,3a,45.5y,356.47h,88.26t/data=!3m6!1e1!3m4!1sb7Kw2ZqfSEw6ck8X2scGiA!2e0!7i13312!8i6656
https://www.google.com/maps/@49.0901466,-123.0576636,3a,42.6y,90.96h,89.74t/data=!3m6!1e1!3m4!1sTRoOCTh62WlDGSJtXNcitg!2e0!7i13312!8i6656?hl=en
It looks like they never updated the signals after changing the lane configuration at both locations :-|.
There was a real triple left turn but it was removed a few years ago when they built an interchange:
https://www.google.ca/maps/@49.228272,-122.8193543,3a,39.4y,201.91h,89.3t/data=!3m7!1e1!3m5!1slFUYcV6650j4ANF0KReMgQ!2e0!5s20110801T000000!7i13312!8i6656 (2009 Streetview link)
I was thinking the Mary Hill Bypass might have had one, but I never got to see it pre-interchange. That same area also had the only ramp meter in BC (I don't know of any, though I wish they were more common (unpopular opinion, I know)).
I think I may have driven through that first one, but didn't notice it. I don't mind the sparse signals, but I think more than two for a three lane split-phased signal might be wise. Perhaps an extra signal head on the right, as has become more common.
Quote from: US 89 on August 18, 2018, 08:44:47 AM
I can think of three off the top of my head in Utah, but I know there are more:
...
Bluff St at Sunset Blvd, St. George (https://goo.gl/maps/PxPBJgNH5iR2)
I like that the sign actually specifies "3 LEFT TURN LANES". You'd normally see "LEFT 3 LANES" for such an approach (or no signage at all, just arrows).
Jackson Street (https://www.google.com/maps/@41.8783577,-87.6191101,3a,15y,91.47h,87.06t/data=!3m5!1e1!3m3!1sg1csf3dKUSlv1AR9VPLTZw!2e0!6s%2F%2Fgeo3.ggpht.com%2Fcbk%3Fpanoid%3Dg1csf3dKUSlv1AR9VPLTZw%26output%3Dthumbnail%26cb_client%3Dsearch.TACTILE.gps%26thumb%3D2%26w%3D96%26h%3D64%26yaw%3D269.81757%26pitch%3D0%26thumbfov%3D100!5m1!1e1?hl=en) in Chicago has one of these at its east end at Lake Shore Drive.
Quote from: cl94 on January 01, 2015, 09:36:40 PM
Quote from: tradephoric on October 04, 2014, 08:35:28 PM
SYNCHRO models of Bruce Browns Blvd and Florida 56 (both have the same upstream geometry and traffic volumes):
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi478.photobucket.com%2Falbums%2Frr144%2Ftradephoric%2FTransportation%2520Pictures%2FCrosswalks%2FFlorida3-lane_zps131a2aca.jpg&hash=b114178c295fd3a5ceaac6d78284b9d992329815) (http://s478.photobucket.com/user/tradephoric/media/Transportation%20Pictures/Crosswalks/Florida3-lane_zps131a2aca.jpg.html)
https://www.google.com/maps/@28.185609,-82.3535353,339m/data=!3m1!1e3
The triple left turn model runs a 200 second cycle length with pedestrian crossings up to 225 feet. A long cycle is needed to satisfy the pedestrian interval requirements found in the MUTCD. The Median U-turn model runs an 80 second cycle length with short pedestrian crossings. It's a simple 2-phase intersection that maximizes throughput.
Multiple left turn lanes aren't always the answer to maximize throughput.
If it gets to the point where you need more than a double left and the road requiring such a left isn't one-way, you should be considering something other than standard turn treatment. The current setup has an 11-lane cross section on its widest approach with no refuge island. As you said, the cycle length is excessive, as clear time is needed in addition to the long pedestrian interval. Assuming a pedestrian speed of 2.5 mph (conservative estimate for walking speed if there are a significant amount of elderly users), the minimum clear pedestrian interval is 62 seconds. While the median U-turn proposal only produces a slight reduction of lanes at the intersection, a refuge island will allow the pedestrian interval to be halved. Additionally, as there are fewer phases at the intersection, there's less lost time built into the cycle.
If you have the space for a triple left turn, you almost certainly have the space for a median U-turn, which is almost always a better option, especially if two are opposing, as in this case.
Does anyone know definitively why Florida makes these design choices as consistently as they do?
If there is major left turn movement, I can't imagine a median U turn would provide sufficient capacity. Is that capacity really comparable? Triple left also probably is still the cheapest.
Orlando has many wide boulevards throughout the city and probably has the highest concentration of long pedestrian crosswalks in America. Orlando isn't the only city in America with wide boulevards - Detroit and New Orleans have wider boulevards on average — but Orlando intersections are designed to get pedestrians the entire way across the intersection and don't split them up into two shorter crossings (like you routinely see at wide intersections in Detroit and New Orleans). Long continuous crosswalks naturally lead to high cycle lengths, as enough time needs to be given to allow pedestrians to cross the street. The higher the cycle length the more left-turn queuing space is needed to prevent left-turners from backing up into the through lanes. Long continuous crosswalks throughout Orlando is one of the main reasons why you see so many massive intersections with double and triple-left turn lanes. Here are all the intersections in Orlando with continuous crosswalks of 140 feet or more. I doubt you will find another city in America that comes close to this many long continuous crosswalks:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi478.photobucket.com%2Falbums%2Frr144%2Ftradephoric%2FTransportation%2520Pictures%2FCrosswalks%2FOrangeover140feet.jpg&hash=4f38193a5b3c085faa3d244b6d7d19e9f01b88f9)
While we are on the subject, here is a proposed triple left turn lane at a Parallel Flow Intersection (PFI) at the US 41 / SR-54 intersection in Land "˜O Lakes, Florida:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2Few4jVnk.jpg&hash=e803316338a920f2adb6be7470fc9e3201d672de)
For the amount of ROW this intersection would require, my proposal would be to convert it to a Town Center Intersection. I love TCIs but i understand why they aren't more common (as often times you are trying to convert an existing intersection due to LOS issues, and completely demolishing multiple buildings to fit a TCI doesn't make much financial sense). For some type of planned city though, i think a TCI would be a great intersection choice.
https://www.youtube.com/watch?v=eFFw8JDObGA
If I understand correctly, triple left turns are common in Florida because they have to dedicate most of the signal phase to through traffic? Interesting predicament...which came first, the long crosswalk or all the lanes? :D
I think I already gave my opinion before, but that PFI intersection proposal is absurd. if you need that many lanes, you need to consider building a freeway. At least that way, there won't be as many lanes to cross as a pedestrian. The Town Center intersection seems like a very reasonable alternative.
FWIW, two of the left turns in that PFI proposal are quadruple lefts. Oh my...
Quote from: jakeroot on October 01, 2018, 01:33:01 PM
If I understand correctly, triple left turns are common in Florida because they have to dedicate most of the signal phase to through traffic? Interesting predicament...which came first, the long crosswalk or all the lanes? :D
There really is a little chicken and the egg going on here! I don't know enough about Florida's transportation history to determine how they came up with their standard ROW's. I know for Detroit in 1924 the Rapid Transit Commission released a report named "Proposed Super-Highway Plan for Greater Detroit" that would largely shape the regions transportation network. In the plan they proposed 204 ft ROW for major arterials in the region. It was determined 120 feet was the minimum ROW needed for 8-lanes of express vehicular traffic (including sidewalks) and an additional 84 feet of central space was needed for rapid transit lines (120+84=204). With such wide boulevards pedestrians would cross each direction of the Super-Highway separately (almost treating them as two one-way streets). Ultimately, even with extremely wide boulevards, Detroit has relatively short pedestrian crossings which helps reduce required cycle lengths and left turn bay queue lengths. It's the total opposite for Florida.
In the Boston area, these roads would be a single lane in each direction, resulting in shorter signal cycle lengths but much less capacity. And of course, no grid.
I am thinking Salt Lake City could match Orlando.
Quote from: tradephoric on October 01, 2018, 11:05:21 AM
Orlando has many wide boulevards throughout the city and probably has the highest concentration of long pedestrian crosswalks in America. Orlando isn't the only city in America with wide boulevards - Detroit and New Orleans have wider boulevards on average — but Orlando intersections are designed to get pedestrians the entire way across the intersection and don't split them up into two shorter crossings (like you routinely see at wide intersections in Detroit and New Orleans). Long continuous crosswalks naturally lead to high cycle lengths, as enough time needs to be given to allow pedestrians to cross the street. The higher the cycle length the more left-turn queuing space is needed to prevent left-turners from backing up into the through lanes. Long continuous crosswalks throughout Orlando is one of the main reasons why you see so many massive intersections with double and triple-left turn lanes. Here are all the intersections in Orlando with continuous crosswalks of 140 feet or more. I doubt you will find another city in America that comes close to this many long continuous crosswalks:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi478.photobucket.com%2Falbums%2Frr144%2Ftradephoric%2FTransportation%2520Pictures%2FCrosswalks%2FOrangeover140feet.jpg&hash=4f38193a5b3c085faa3d244b6d7d19e9f01b88f9)
Having lived throughout the state, I'd say generally South Florida (especially Palm Beach County and Broward County) has consistently more larger intersections then Orlando by a large margin. I don't have numbers/stats to back it up, but just from my time in both places thats my memory of it. My understanding is Orlando has a ban on more then 3 thru lanes per direction on at-grade roads with pedestrians, which doesn't exist in South Florida, so you even see some roads where many intersections in a row are 11 lanes across for pedestrians. Orlando its really rare to see more then 9 lanes across (3 straight, 2 left turn, 1 right turn, 3 opposing straight) and most that are more then that ban pedestrian crossings in that direction.
Is there any intersections with as many or more lanes then that Land O Lakes one built? I've never seen any at grade quite that ginormous.
that may be a place for an overpass if just to get out needing big storage areas for train backups.
No idea if this was posted already but I was randomly looking at Tuscaloosa AL and I found this triple-left-turn.
Link: https://goo.gl/maps/va1S45PSDtNTAyYt9
(https://i.imgur.com/YplCAvj.png)
Quote from: andrepoiy on June 24, 2023, 08:37:33 PM
No idea if this was posted already but I was randomly looking at Tuscaloosa AL and I found this triple-left-turn.
Lots of fun there. Opposing traffic also has a triple left. And both directions of cross traffic have a double left with option lane.
I recently found this one at a T-interswection in Tsawwassen, BC: https://www.google.com/maps/@49.0329421,-123.090212,3a,42.4y,148.64h,88.61t/data=!3m6!1e1!3m4!1sEiDvLekAEIODH5_fYiEFxg!2e0!7i16384!8i8192?entry=ttu.
I think this the minor road here will probably be extended in the future, but for now there is a triple left turn.
Here's a triple U-turn in Seremban 2, Negeri Sembilan, Malaysia: https://maps.app.goo.gl/BYPMBzAT8SyrctEH8
Persiaran Utama S2/3 is a 6-lane boulevard with one interchange, another wide intersection that could be expanded into one, and a dead-end. All 3 lanes do a U-turn.
^^ Looks like triple right turns ;)
A few more Alabama examples:
US 72 @ Moores Mill Road in Huntsville (https://www.google.com/maps/@34.7739181,-86.5390366,3a,75y,115.53h,89.99t/data=!3m6!1e1!3m4!1s0lRckMW2zUPC_YfTb0uFew!2e0!7i16384!8i8192?entry=ttu)
Alt. US 72/AL 20 & US 31 in Decatur (https://www.google.com/maps/@34.6098193,-86.9774549,3a,49.1y,135.62h,84.3t/data=!3m7!1e1!3m5!1sFBde-s8jqWS2r7hxuaTelA!2e0!5s20210301T000000!7i16384!8i8192?entry=ttu)
There's also this one (https://www.google.com/maps/@33.4242475,-86.7031316,3a,75y,42.66h,92.48t/data=!3m6!1e1!3m4!1shrXFjvrprViQjWbrEHLd1Q!2e0!7i16384!8i8192?entry=ttu) along US 280 near Birmingham.
Quote from: bcroadguy on October 01, 2023, 06:59:37 AM
I recently found this one at a T-interswection in Tsawwassen, BC: https://www.google.com/maps/@49.0329421,-123.090212,3a,42.4y,148.64h,88.61t/data=!3m6!1e1!3m4!1sEiDvLekAEIODH5_fYiEFxg!2e0!7i16384!8i8192?entry=ttu.
I think this the minor road here will probably be extended in the future, but for now there is a triple left turn.
Nice, I've been through there a few times without even realizing what I was looking at. I don't recall many triple lefts in BC.
Any idea where that road would be extended to? Tsawwassen Springs is a private development, and English Bluff seems pretty far off to the south with a golf course in the way.
I see someone revived this thread.
I believe the following is an exhaustive list of current examples in Northern Nevada:
- I-580 SB at South Carson Street in Carson City https://maps.app.goo.gl/Vwua6cCcbJohdaxBA. Officially "temporary" until NDOT gets funding to build an interchange here, the left turn carries the US 395 mainline. The straight movement E-W is the US 50 mainline.
- South Virginia Street SB at South McCarran Blvd (NV 659) in Reno https://maps.app.goo.gl/Cami8WFDmzrUDvw47
- South McCarran Blvd (NV 659) WB at Longley Lane in Reno https://maps.app.goo.gl/tyKLDzyihMRewSU38 . Also includes a left lane drop
- I-80 EB at McCarran Blvd East (NV 659) in Sparks: https://maps.app.goo.gl/tvekgg7S1gkSTJYV6
- I-80 EB at Pyramid Way (NV 445) in Sparks https://maps.app.goo.gl/9Acao719Gcb3i4Dh7
- North McCarran Blvd (NV 659) EB at Pyramid Way (NV 445) in Sparks https://maps.app.goo.gl/jPvABJdgbTnmmMNz5
- I-80 EB at Sparks Blvd in Sparks https://maps.app.goo.gl/3pmqwfjWNnb5FMo8A
- Sparks Blvd NB at Lincoln Way in Sparks https://maps.app.goo.gl/FmVyRf8aYP1ii4Ms9. Despite the name, this is NOT an old alignment of the Lincoln Highway
Northern California has far too many for me to list. The Bay Area and Sacramento are full of triple lefts.
Quote from: cl94 on October 03, 2023, 12:42:02 AM
I believe the following is an exhaustive list of current examples in Northern Nevada:
- I-580 SB at South Carson Street in Carson City [https://maps.app.goo.gl/Vwua6cCcbJohdaxBA]. Officially "temporary" until NDOT gets funding to build an interchange here, the left turn carries the US 395 mainline. The straight movement E-W is the US 50 mainline.
- South Virginia Street SB at South McCarran Blvd (NV 659) in Reno [https://maps.app.goo.gl/Cami8WFDmzrUDvw47]
- South McCarran Blvd (NV 659) WB at Longley Lane in Reno [https://maps.app.goo.gl/tyKLDzyihMRewSU38]. Also includes a left lane drop
- I-80 EB at McCarran Blvd East (NV 659) in Sparks: [https://maps.app.goo.gl/tvekgg7S1gkSTJYV6]
- I-80 EB at Pyramid Way (NV 445) in Sparks [https://maps.app.goo.gl/9Acao719Gcb3i4Dh7]
- North McCarran Blvd (NV 659) EB at Pyramid Way (NV 445) in Sparks [https://maps.app.goo.gl/jPvABJdgbTnmmMNz5]
- I-80 EB at Sparks Blvd in Sparks [https://maps.app.goo.gl/3pmqwfjWNnb5FMo8A]
- Sparks Blvd NB at Lincoln Way in Sparks [https://maps.app.goo.gl/FmVyRf8aYP1ii4Ms9]. Despite the name, this is NOT an old alignment of the Lincoln Highway
I was going to say you forgot one, but after checking I see that it was removed. Formerly, WB Fairview Dr at Carson St had two dedicated left turn lanes and the rightmost lane was a shared left-thru-right, but the left movement has since been removed from the shared lane. I assume that was a temporary setup from when Fairview was Temp US 50/395.
Castle Rock, CO:
(https://i.imgur.com/MRGI7D3.png)
Link: https://maps.app.goo.gl/9wZFF5ZBZYk95Xhw8
For the life of me, I can't find where I posted this before, but it was in a similar thread. And I know it's mentioned above, but I-225 NB to Parker Road (CO83) here in Aurora now has 3 lefts and 4 rights.
(https://i.postimg.cc/Px0vjV55/225.png)