Triple "Left Turn Only" Lanes

[Roadsguy]

Lots of them on Maryland's surface-expressways:

-MD 210/MD 228
-US 301/MD 5
-MD 90/MD 528 (not quite only, but most traffic turns left)]
-Probably a lot more that I'm forgetting.

[Tom895]

 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

[Scott5114]

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.

[jakeroot]

Federal Way, WA. SR 18 West, left towards Kits Corner Road: http://goo.gl/SrYT6O

[woodpusher]

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.

[tradephoric]

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

[cpzilliacus]

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?

[NE2]

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.

[hotdogPi]

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.

[tradephoric]

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:

[Alps]

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?

[vtk]

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.

[Revive 755]

I-49 at MO 150, world's only SPUI with any triple left movements?

[NE2]

I-49 at MO 150, world's only SPUI with any triple left movements?

Nope. http://www.ite.org/Membersonly/annualmeeting/1996/AIA96C89.pdf

[vtk]

I-49 at MO 150, world's only SPUI with any triple left movements?

ODOT just built one in Grove City last year.  I-71 at OH 665.

[jakeroot]

I-49 at MO 150, 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)
- Westlink M7 @ Sunnyholt (Sydney)
- East-West Arterial Rd @ Sandgate (Brisbane)
- East-West Arterial Rd @ Southern Cross Way (Brisbane)

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.

[Revive 755]

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

[brickbuilder711]

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

[jeffandnicole]

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

[Revive 755]

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

[Brandon]

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

Fuck, at that point just knock it off and put in some Michigan Lefts.

[jakeroot]

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

The road width suggests to me that the diagram is actually of an intersection in Florida.

[jeffandnicole]

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

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.

[bigboi00069]

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.

[jakeroot]

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

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.