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Old June 4th, 2009, 05:55 AM   #81
Verso
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Why do vehicles entering this Paris roundabout have priority over vehicles already in the roundabout?
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Old June 4th, 2009, 06:38 AM   #82
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Quote:
Originally Posted by kemet1984 View Post
I hate to say it, but that roundabout is worthless for any meaningful automobile traffic whatsoever. It was constructed in a time when the horse still dominated human transport. The roundabout really only works in smaller scale i.e. like for a subdivision I saw out in Redwood, California. I'm a skeptic as to whether or not it would do any good in a modern city of several millions.
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The larger i have seen:



It's placed at Moscow ~390m width including roads.

P.S. don't post eliptical Squares, they aren't roundabouts.
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Old June 4th, 2009, 07:22 AM   #83
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I agree roundabouts do not have much efficiency in congested cities.
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Old June 4th, 2009, 09:00 AM   #84
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Somebody already mentioned it:

Kreisel Betzholz. (Diameter 400m short side, 500m long side).
It's close to the place where I live, I have to say, I would prefer a normal interchange.

Also interesting:

Underground roundabout in Frauenfeld.
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Old June 4th, 2009, 09:14 AM   #85
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Quote:
Originally Posted by earthJoker View Post
Somebody already mentioned it:

Kreisel Betzholz. (Diameter 400m short side, 500m long side).
It's close to the place where I live, I have to say, I would prefer a normal interchange.
the road on the right is a motorway which will be (or planned to be) continued to the left...

there is an undepass and an overpass in the alignment and this will be a huge roundabout motorway interchange in the future...
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Old June 4th, 2009, 10:35 AM   #86
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That's over here, right?
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Old June 4th, 2009, 11:10 AM   #87
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Quote:
Originally Posted by H123Laci View Post
the road on the right is a motorway which will be (or planned to be) continued to the left...

there is an undepass and an overpass in the alignment and this will be a huge roundabout motorway interchange in the future...
This are the plans for the extension of the motorway:


You can get Information about the projected gap closing of the Oberlandoutobahn here:
http://www.oberlandautobahn.zh.ch/in...n/de/home.html
(German only)
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Old June 4th, 2009, 04:18 PM   #88
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Quote:
Originally Posted by Svartmetall View Post
The UK is definitely the world leader in Roundabouts - they are literally everywhere. Australia has a few, but nothing like the number overall - same with NZ.

Though I quite like roundabouts, they are quite pedestrian hostile unless special effort is made for them not to be so.
"Today there are approximately 10,000 modern roundabouts in the United Kingdom, 15,000 in Australia and 20,000 in France. The modern roundabout is also popular in South Africa, Israel, and New Zealand."
http://www.azdot.gov/CCPartnerships/...outs/index.asp

There we go Australia has a third more roundabouts that the UK. But France wins the race. The rate they are being built here though. It wouldn't surprise me if we overtake France.

This is a standard new subdivision in Perths Northern suburbs, I count 52 roundabouts here alone.
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Old June 4th, 2009, 07:48 PM   #89
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These are the roundabouts in my little part of the world - and this is just the central area.

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Old June 4th, 2009, 08:21 PM   #90
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Quote:
Originally Posted by H123Laci View Post
there is an undepass and an overpass in the alignment and this will be a huge roundabout motorway interchange in the future...
In fact it's not a roundabout officially.
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Old June 5th, 2009, 12:34 AM   #91
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You're right, it's an oval
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Old June 5th, 2009, 06:18 PM   #92
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Traffic square.
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Old June 5th, 2009, 07:35 PM   #93
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Is this also being counted as a roundabout?

Marrakech, Morocco

image hosted on flickr


image hosted on flickr
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Old June 5th, 2009, 10:06 PM   #94
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An underground roundabout U/C on the Faroe Islands:


Last edited by Verso; June 5th, 2009 at 10:14 PM.
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Old June 5th, 2009, 10:43 PM   #95
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That is sick
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Old June 6th, 2009, 04:04 AM   #96
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Step aside for the Turbo roundabout!

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Old June 6th, 2009, 05:37 AM   #97
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Step aside for the Turbo roundabout!

Does that have traffic lights on it? Seems a very inefficient roundabout this particular one.
I've never seen the point of turbo roundabouts. In Perth we have hundreds of double lane roundabouts that all seem to work well. Though Australia has never built roundabouts that require changing lanes, so people here are used to always staying in their lane until they exit.
These turbo roundabouts seem to take away the natural give way at entry instinct.
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Old June 6th, 2009, 05:42 AM   #98
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Quote:
Originally Posted by Verso View Post
An underground roundabout U/C on the Faroe Islands:

that's so hot.
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Old June 6th, 2009, 11:07 AM   #99
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Quote:
Originally Posted by Verso View Post
In fact it's not a roundabout officially.
and unofficially?
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Old June 6th, 2009, 11:15 AM   #100
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Quote:
Originally Posted by scotdaliney View Post
I've never seen the point of turbo roundabouts.
its safer and more efficient than a 2lane roundabout...
(you have to choose the right lane BEFORE entering the roundabout, so you need no lane change IN the roundabout...)

but this 2+2 lane turbo seems to be stupid...

that volume recquires (and justifies the cost of) grade separation...
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