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Intersections with full sets of turn lanes

Started by webny99, January 16, 2018, 08:45:58 AM

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webny99

It popped into my head recently that there are very few intersections with a full set of turn lanes. When I say this, I mean there is at least one designated left and one designated right turn lane on every approach, for a minimum total of eight turn lanes. Protected right turns can count, as long as they do have a designated lane on the approach.

I wonder how high we can get as far as total number of designated turn lanes at an intersection. If all turns had two designated lanes, that would be 16. I have doubts that there are any with 16 though :meh:


1995hoo

The first one that came to my mind is Van Dorn Street and Franconia Road here in Fairfax County. Total of eleven turn-only lanes and one optional right-turn lane (going anticlockwise around the intersection here): SB Van Dorn has two left-only and two right-only, EB Franconia has two left-only and one right-only, NB Van Dorn has one left-only and one right-only, and WB Franconia has one left-only and one right-only as well as an optional right-turn lane.
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webny99

Quote from: 1995hoo on January 16, 2018, 09:11:07 AM
The first one that came to my mind is Van Dorn Street and Franconia Road here in Fairfax County.

Wow, that started with a bang! Right turn lanes don't seem to be that common around here (though we still have a good few).

jeffandnicole

Very common in Delaware.  Just a few examples...

https://goo.gl/maps/F6zQxrGwZU52
https://goo.gl/maps/jowaW4MXCDH2
https://goo.gl/maps/TUPAuGFucBv (Double Left Turns all the way around, so 12 turning lanes in total here)
https://goo.gl/maps/chZR8jfq3dK2 (Another 12 laner due to 2x left turns lanes)

tradephoric

#4
Quote from: webny99 on January 16, 2018, 08:45:58 AM
I wonder how high we can get as far as total number of designated turn lanes at an intersection. If all turns had two designated lanes, that would be 16. I have doubts that there are any with 16 though :meh:

Bruce B Downs Blvd & Florida 56 has 17 designated turn lanes:
https://www.google.com/maps/@28.1858654,-82.3535844,163m/data=!3m1!1e3

EDIT: This intersection also has one of the longest continuous crosswalks in America at about 220 feet.  This is especially long considering the intersection doesn't have any weird angles.

TheArkansasRoadgeek

Current Count: 74 Sets

W. Markham and Shackleford Street(s) has 10 turning lanes with doubles of left turn lanes. Bringing the count to 74.
Well, that's just like your opinion man...

webny99

Quote from: TheArkansasRoadgeek on January 16, 2018, 10:45:26 AM
Current Count: 74 Sets

Why the big font?

And where did you get 74 from? There have only been 7 or 8 examples so far  :hmmm:

corco

They're being constructed as a matter of policy when major intersections are rebuilt in Ada County, Idaho.

TheArkansasRoadgeek

#8
Quote from: webny99 on January 16, 2018, 10:50:52 AM
Quote from: TheArkansasRoadgeek on January 16, 2018, 10:45:26 AM
Current Count: 74 Sets

Why the big font?

And where did you get 74 from? There have only been 7 or 8 examples so far  :hmmm:
I don't know! Maybe so it could stand out? Why must you complain? I posted an example, so that one brought the count to 74.
I added all the lanes up based on the criteria.
Well, that's just like your opinion man...

webny99

Quote from: TheArkansasRoadgeek on January 16, 2018, 10:55:48 AM
Quote from: webny99 on January 16, 2018, 10:50:52 AM
Why the big font?

And where did you get 74 from? There have only been 7 or 8 examples so far  :hmmm:
I don't know! Maybe so it could stand out? Why must you complain? I posted an example, so that one brought the count to 74.
I added all the lanes up based on the criteria.

Oh. Gotcha, but 74 lanes does not equal 74 sets. I wasn't complaining at all, just genuinely confused  :confused:

TheArkansasRoadgeek

Quote from: webny99 on January 16, 2018, 11:18:00 AM
Quote from: TheArkansasRoadgeek on January 16, 2018, 10:55:48 AM
Quote from: webny99 on January 16, 2018, 10:50:52 AM
Why the big font?

And where did you get 74 from? There have only been 7 or 8 examples so far  :hmmm:
I don't know! Maybe so it could stand out? Why must you complain? I posted an example, so that one brought the count to 74.
I added all the lanes up based on the criteria.

Oh. Gotcha, but 74 lanes does not equal 74 sets. I wasn't complaining at all, just genuinely confused  :confused:
So, just to be clear, I went down to latest posts and added the twin sets and general L/R turn lane sets, so there may be an error with that number, but I am human. But, if you would like to correct the count with what you have in mind you may.
Well, that's just like your opinion man...

kphoger

Well, that didn't take a whole lot of searching for Wichita.  I literally checked fewer than ten intersections and came up with two.
13th & Maize Road
21st & Webb Road




Quote from: TheArkansasRoadgeek on January 16, 2018, 11:23:20 AM
Quote from: webny99 on January 16, 2018, 11:18:00 AM
Quote from: TheArkansasRoadgeek on January 16, 2018, 10:55:48 AM
Quote from: webny99 on January 16, 2018, 10:50:52 AM
Why the big font?

And where did you get 74 from? There have only been 7 or 8 examples so far  :hmmm:
I don't know! Maybe so it could stand out? Why must you complain? I posted an example, so that one brought the count to 74.
I added all the lanes up based on the criteria.

Oh. Gotcha, but 74 lanes does not equal 74 sets. I wasn't complaining at all, just genuinely confused  :confused:
So, just to be clear, I went down to latest posts and added the twin sets and general L/R turn lane sets, so there may be an error with that number, but I am human. But, if you would like to correct the count with what you have in mind you may.


You're missing the point.  The OP is looking for an intersection with a "full set of turn lanes".  He then defines that as being "a minimum total of eight turn lanes."  So...
intersection = set = minimum total of eight turn lanes

If you're counting lanes, or if you're counting twin sets, or whatever, then you're not counting intersections.

Unless I've miscounted, this post brings the total to 9 intersections = 9 sets.
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Male pronouns, please.

Quote from: Philip K. DickIf you can control the meaning of words, you can control the people who must use them.

webny99

Quote from: kphoger on January 16, 2018, 12:05:55 PM
You're missing the point.  The OP is looking for an intersection with a "full set of turn lanes".  He then defines that as being "a minimum total of eight turn lanes."  So...
intersection = set = minimum total of eight turn lanes

If you're counting lanes, or if you're counting twin sets, or whatever, then you're not counting intersections.

Unless I've miscounted, this post brings the total to 9 intersections = 9 sets.

That is not only correct, but well stated  :thumbsup:
I won't prevent anyone from making a different definition of "set" (if you want to count each intersection as four, or eight, or whatever, that's fine), but I was considering a complete intersection to be a set for the purposes of this thread, hence my confusion.

Brandon

How about going smaller: Ridge Road & IL-126, Plainfield, IL.  A full set of turn lanes in each direction with only one through lane per direction!
"If you think this has a happy ending, you haven't been paying attention." - Ramsay Bolton, "Game of Thrones"

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webny99

Quote from: Brandon on January 16, 2018, 12:26:25 PM
How about going smaller: Ridge Road & IL-126, Plainfield, IL.  A full set of turn lanes in each direction with only one through lane per direction!

That's what I like to see! This one in Webster only has five of eight in the link, but when current improvements are complete, it will have right turn lanes on Ridge, bringing it to seven of eight. So close!

kphoger

Quote from: Brandon on January 16, 2018, 12:26:25 PM
How about going smaller: Ridge Road & IL-126, Plainfield, IL.  A full set of turn lanes in each direction with only one through lane per direction!

Wacky.
Keep right except to pass.  Yes.  You.
Visit scenic Orleans County, NY!
Male pronouns, please.

Quote from: Philip K. DickIf you can control the meaning of words, you can control the people who must use them.

tradephoric


doorknob60

#17
Quote from: corco on January 16, 2018, 10:55:31 AM
They're being constructed as a matter of policy when major intersections are rebuilt in Ada County, Idaho.

Yep, there are quite a few (though less than I originally thought now that I think about it harder), and the number is quickly growing (eg. Cole and Fairview, and Eagle and Fairview now qualify, even though you wouldn't see it in Google Maps satellite view). In addition, most of them have dual left turn lanes on at least two, if not all legs.

Here's one example though, Overland and Cole. Bonus points for being literally on top of 11 lanes of freeway. https://www.google.com/maps/@43.5902057,-116.2742477,219m/data=!3m1!1e3
And here's an example where all legs have dual left turns (Franklin and Cloverdale): https://www.google.com/maps/@43.6048578,-116.3344608,144m/data=!3m1!1e3

Brandon

Quote from: kphoger on January 16, 2018, 01:02:55 PM
Quote from: Brandon on January 16, 2018, 12:26:25 PM
How about going smaller: Ridge Road & IL-126, Plainfield, IL.  A full set of turn lanes in each direction with only one through lane per direction!

Wacky.

Especially when you consider it's in the middle of nowhere.  Interestingly enough, it's completely balanced at street level: https://goo.gl/maps/gCwdZuKSWeq with two left turn towers, two right turn towers, and one straight through signal head per direction.
"If you think this has a happy ending, you haven't been paying attention." - Ramsay Bolton, "Game of Thrones"

"Symbolic of his struggle against reality." - Reg, "Monty Python's Life of Brian"

TheStretchofFreeways

I-69 and TX-6
12 Turning lanes, 14 if counting U-Turn lanes
Dropped Pin
near Hwy 6, Sugar Land, TX 77479
https://goo.gl/maps/Ucf5tEWjU3U2


webny99

Quote from: TheStretchofFreeways on January 16, 2018, 09:16:10 PM
I-69 and TX-6
12 Turning lanes, 14 if counting U-Turn lanes
Dropped Pin
near Hwy 6, Sugar Land, TX 77479
https://goo.gl/maps/Ucf5tEWjU3U2

Well, that's great, but it's not a single intersection  :pan:

formulanone

#21
Many metro areas in Florida can boast of two lefts + one right per direction of travel at a four-way intersection. Pick almost any two SRs in South Florida, Tampa Bay, Orlando, and Jacksonville, and you'll find it. But the triple-lefts and dual/triple-rights...those are rarer.

Okeechobee Boulevard and Military Trail in West Palm Beach, just for sheer throughput.
https://www.google.com/maps/@26.7068525,-80.1110314,165m/data=!3m1!1e3?hl=en
- Two lefts and one right in every direction; eight lanes on FL 704, six on FL 809.

Nearby, US 441/FL 7 and Forrest Hill Boulevard (FL 882) has an impressive array. Southbound FL 7 has 3 left-only and 2 right-only turn lanes to go with 4 through lanes. It's 3L/1R for northbound US 441/FL 7. Eastbound CR 882 has 3L/2R. Westbound FL 882 has 2L/1R.
https://www.google.com/maps/@26.6507478,-80.203578,144m/data=!3m1!1e3?hl=en
- 17 turn lanes in total.

AlexandriaVA

Quote from: 1995hoo on January 16, 2018, 09:11:07 AM
The first one that came to my mind is Van Dorn Street and Franconia Road here in Fairfax County. Total of eleven turn-only lanes and one optional right-turn lane (going anticlockwise around the intersection here): SB Van Dorn has two left-only and two right-only, EB Franconia has two left-only and one right-only, NB Van Dorn has one left-only and one right-only, and WB Franconia has one left-only and one right-only as well as an optional right-turn lane.

I know that intersection quite well, as you may not be surprised to hear.

Funny, I just started a thread about street grids (or the lack thereof), and I had this intersection in mind when complaining about the lack of good street grids in the mid and outer suburbs (Fairfax, Loudoun, etc), warranting intersections such as these, as opposed to where I am in Arlington/Alexandria, where they are scarcely seen due in part to our street grids.

US 89

#23
They’re not that rare on major arterials in Salt Lake. Here’s one in Salt Lake City, at 400 South and 700 East. All four approaches have 3 through lanes, 2 left turn lanes, and a right turn lane for a total of 12 turn lanes and 12 through lanes.

There are a ton of intersections that come really close, but often one of the approaches has a shared through/right turn lane.

freebrickproductions

The ones I'm aware of here in Huntsville, AL:
https://www.google.com/maps/@34.705233,-86.5698325,132m/data=!3m1!1e3

https://www.google.com/maps/@34.712853,-86.6267362,118m/data=!3m1!1e3

https://www.google.com/maps/@34.735053,-86.6269938,164m/data=!3m1!1e3

https://www.google.com/maps/@34.7738945,-86.5385173,164m/data=!3m1!1e3

https://www.google.com/maps/@34.7554694,-86.7140682,169m/data=!3m1!1e3

https://www.google.com/maps/@34.6600279,-86.4834332,174m/data=!3m1!1e3

Here's one in Madison, AL:
https://www.google.com/maps/@34.6765888,-86.7519671,130m/data=!3m1!1e3

One in Muscle Shoals, AL:
https://www.google.com/maps/@34.7448588,-87.667526,113m/data=!3m1!1e3

Florence, AL:
https://www.google.com/maps/@34.829873,-87.6278575,224m/data=!3m1!1e3

https://www.google.com/maps/@34.8437698,-87.6463163,138m/data=!3m1!1e3

https://www.google.com/maps/@34.8434599,-87.6689449,214m/data=!3m1!1e3

https://www.google.com/maps/@34.8393757,-87.6876921,144m/data=!3m1!1e3

Albertville, AL:
https://www.google.com/maps/@34.2760239,-86.2045687,159m/data=!3m1!1e3

US 231/US 278 near Brooksville, AL:
https://www.google.com/maps/@34.1669853,-86.5158627,349m/data=!3m1!1e3

Decatur, AL:
https://www.google.com/maps/@34.5622827,-86.9731265,195m/data=!3m1!1e3

https://www.google.com/maps/@34.5600788,-86.9998935,202m/data=!3m1!1e3

https://www.google.com/maps/@34.6193678,-87.0303803,250m/data=!3m1!1e3

Also, would any of these count, where there's less than 8 turn lanes due to a limited number of directions one can turn (but all available turns have their own lane, other than U-turns)?
https://www.google.com/maps/@34.7278782,-86.6953384,138m/data=!3m1!1e3

https://www.google.com/maps/@34.7201424,-86.6274086,172m/data=!3m1!1e3

https://www.google.com/maps/@34.7142479,-86.6430664,152m/data=!3m1!1e3

https://www.google.com/maps/@34.7155573,-86.6436714,149m/data=!3m1!1e3
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