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Figure eight roundabouts

Started by Max Rockatansky, June 09, 2024, 08:47:12 PM

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Max Rockatansky



kalvado

Isn't "dogbone" a general term?

epzik8

Such roundabouts would never work where I live, even though we've embraced conventional ones.
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Rothman

Quote from: epzik8 on June 10, 2024, 07:16:37 AMSuch roundabouts would never work where I live, even though we've embraced conventional ones.

Meh.  The way this one was implemented wouldn't work anywhere, but they can work if striped/configured as a traditional roundabout.
Please note: All comments here represent my own personal opinion and do not reflect the official position(s) of NYSDOT.

kalvado

Quote from: epzik8 on June 10, 2024, 07:16:37 AMSuch roundabouts would never work where I live, even though we've embraced conventional ones.
These are primarily for use at diamond interchanges. Smaller than SPUI, less invasive than DDI.

epzik8

Quote from: kalvado on June 10, 2024, 07:30:59 AM
Quote from: epzik8 on June 10, 2024, 07:16:37 AMSuch roundabouts would never work where I live, even though we've embraced conventional ones.
These are primarily for use at diamond interchanges. Smaller than SPUI, less invasive than DDI.

That makes sense then.
From the land of red, white, yellow and black.
____________________________

My clinched highways: http://tm.teresco.org/user/?u=epzik8
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cjw2001

No difference in rules from a "normal" roundabout.  Just flattened in one direction and stretched out a bit in the other.  If you can't understand a yield sign there is little hope for you.  And god forbid you have to drive in a curve instead of a straight line.

Meanwhile:  https://fox59.com/news/peanut-roundabout-construction-to-begin-monday-in-beech-grove/

jakeroot


Max Rockatansky

Dog Bone Roundabout was kind of doing something for me.

jakeroot

#9
Quote from: Rothman on June 10, 2024, 07:22:46 AM
Quote from: epzik8 on June 10, 2024, 07:16:37 AMSuch roundabouts would never work where I live, even though we've embraced conventional ones.

Meh.  The way this one was implemented wouldn't work anywhere, but they can work if striped/configured as a traditional roundabout.

It was configured as a traditional roundabout, at least when it was built in 2019. But the markings have faded, and they removed the splitter island on the eastern approach, probably ahead of reconstruction as a signalized diamond.

The only real issue as constructed is the western approach (from within the circle) is marked as a double left turn, but the inside lane is actually a U-turn, only the right lane can continue onto Via Inspirada.

Here is a quick comparison to another figure-8 roundabout in Carmel, Indiana. Pretty much identical minus the underpass, but that doesn't affect the design or operation at all:


Dogbone Roundabout Comparison by Jacob Root, on Flickr

Quote from: Max Rockatansky on June 10, 2024, 08:23:35 PMDog Bone Roundabout was kind of doing something for me.

These have long been called dogbone roundabouts, though I think that has mostly been a reference to the interchange style. Flat dogbones without flyovers or underpasses are not as common, though I think the terminology is just as apt.

fwydriver405

When Kelley Square in Worcester, MA was redesigned from one of the most high crash locations in MA into a hybrid rotary/roundabout from Oct 2019 to around 2021-ish, I remember officials calling the new rotary as a "peanut".

I think this is the first and one and only kind in Massachusetts, if not the entirety of New England until very recently. If my memory serves right, they also tried putting one in Inman Square in Cambridge, but that was rejected into the present condition we have now. New Haven, CT at Yale Avenue and Chapel Street just finished their peanut roundabout sometime in early 2023.

KELLEY SQUARE:
Existing Conditions, 31 Oct 2018 during the PM Rush:

Present Condition:
Worcester's Kelley Square Reimagined | VHB


NEW HAVEN, CT
Dangerous New Haven intersection gets a 'peanut' to boost safety

Work Begins On Peanut Roundabout

LilianaUwU

Those are neither figure eights nor roundabouts.
"Volcano with no fire... Not volcano... Just mountain."
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My pronouns are she/her. Also, I'm an admin on the AARoads Wiki.

epzik8

Quote from: fwydriver405 on June 11, 2024, 12:08:15 PMI remember officials calling the new rotary as a "peanut".

That's a new one for me, and I thought I'd heard every term in the book.
From the land of red, white, yellow and black.
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Bobby5280

The terms dogbone and peanut are logical. The figure eight term implies traffic crisscrossing in the middle, which makes me wonder if a DDI could be called a figure-16 roundabout.
:awesomeface:

kalvado

Quote from: Bobby5280 on June 13, 2024, 09:19:23 PMThe terms dogbone and peanut are logical. The figure eight term implies traffic crisscrossing in the middle, which makes me wonder if a DDI could be called a figure-16 roundabout.
:awesomeface:
DNA-like roundabout sounds fancier

NJRoadfan


Bobby5280

Would that be a "figure 12" roundabout? :D

jeffandnicole

Quote from: NJRoadfan on June 13, 2024, 09:54:16 PMMeanwhile in New Jersey..... https://maps.app.goo.gl/h9MeN2uvKDBHWCEe8

And in typical NJ fashion, this is considered a Traffic Circle, not a Roundabout, and on some approaches the advisory speed is an unusually high 40 mph. https://maps.app.goo.gl/3MDQdKY2dHRmXccx5 , https://maps.app.goo.gl/qpK4517X8bygTH6n6

Rothman

Quote from: epzik8 on June 13, 2024, 08:27:52 PM
Quote from: fwydriver405 on June 11, 2024, 12:08:15 PMI remember officials calling the new rotary as a "peanut".

That's a new one for me, and I thought I'd heard every term in the book.

Pfft.  NYSDOT has had a peanut roundabout planned in Central Square for quite a while now.
Please note: All comments here represent my own personal opinion and do not reflect the official position(s) of NYSDOT.

GaryV


kalvado

Quote from: Rothman on June 14, 2024, 12:11:29 AM
Quote from: epzik8 on June 13, 2024, 08:27:52 PM
Quote from: fwydriver405 on June 11, 2024, 12:08:15 PMI remember officials calling the new rotary as a "peanut".

That's a new one for me, and I thought I'd heard every term in the book.

Pfft.  NYSDOT has had a peanut roundabout planned in Central Square for quite a while now.
Jumping above their paygrade yet again?

ErmineNotyours




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