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Sinname

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Sep 25, 2014
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The former is not common and they're called traffic circles. They're pretty much obsolete nowadays, true roundabouts are superior. The only reason to even include traffic circles is in case someone wanted to recreate a famous one like the arc de triomphe.

However, traffic-lighted roundabouts are common enough in Britain at least and cars do have to stop on them.

I don't know if I've understood correctly... Do you say that roundabouts like Arc de Triomphe are obsolete? I'm sorry but I no agree at all.
Where I live are very, very common and useful for traffic congestion. Actually City Halls build many roundabouts in new districts
and old intersections that need it.
But you'll be able to build roundabouts or not in your city :) It should be an option for people who want it.

PS: Big roundabouts have traffic lights but not inside.
 

Person012345

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I don't know if I've understood correctly... Do you say that roundabouts like Arc de Triomphe are obsolete? I'm sorry but I no agree at all.
Where I live are very, very common and useful for traffic congestion. Actually City Halls build many roundabouts in new districts
and old intersections that need it.
But you'll be able to build roundabouts or not in your city :) It should be an option for people who want it.

PS: Big roundabouts have traffic lights but not inside.
The arc de triomphe is not a "roundabout" per se, it's a traffic circle. Cars on the circle have to yield to cars trying to join the circle and they're not all that useful for traffic flow from what I understand. Roundabouts, true roundabouts where joining traffic yields to traffic already on the roundabout, are certainly very useful for traffic flow (they're generally superior to lights, where practical).

http://upload.wikimedia.org/wikipedia/commons/b/b2/Roundabout.bristol.arp.jpg
With many traffic-lighted roundabouts, traffic is required to stop mid-circle.
 

Sinname

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Sep 25, 2014
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Sorry but I don't get the picture, I don't understand the difference between roundabout and traffic circle.
In my language there are various words to call that but they have the same meaning. So, for me, there are one type of roundabouts or traffic circle (Whichever, I'm confused LOL),
bigger or smaller, with traffic lights to enter or not.
Do you know what I mean?

PS: I've never seen (Whichever) in highway.
 

Lakenstaken

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Sorry but I don't get the picture, I don't understand the difference between roundabout and traffic circle.

In my language a roundabout is only when everyone from outside the circle has to yield for the traffic inside (which will be from the left in right-hand traffic), but a traffic circle is like a normal road where everyone has to follow normal rules like yield way for traffic from the right.
 

Ivir Baggins

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The arc de triomphe is not a "roundabout" per se, it's a traffic circle. Cars on the circle have to yield to cars trying to join the circle and they're not all that useful for traffic flow from what I understand. Roundabouts, true roundabouts where joining traffic yields to traffic already on the roundabout, are certainly very useful for traffic flow (they're generally superior to lights, where practical).

http://upload.wikimedia.org/wikipedia/commons/b/b2/Roundabout.bristol.arp.jpg
With many traffic-lighted roundabouts, traffic is required to stop mid-circle.

Although that's allegedly because France adopted roundabouts with priority on the right whilst forgetting that in France people drive on the right. Allegedly.
 

Person012345

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Although that's allegedly because France adopted roundabouts with priority on the right whilst forgetting that in France people drive on the right. Allegedly.
It used to be the case for most of their roundabouts but they've since mostly switched to the normal way apparently for most roundabouts. Maybe a French person can let us know. I mean, it is a monumentally bad idea after all. I've been around the arc de triomphe. I'm glad we were in a big bus that most people won't argue with.
 

WilfriedWebber

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Oct 1, 2014
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The former is not common and they're called traffic circles.
As I wrote before, it depends on local rules and signage. For example, German rules are totally different from English ones.

We consider two types of 'genuine' roundabouts -- and I'm not talking traffic circles here; one bearing the roundabout sign only, basically telling drivers that they have to proceed, in a counter-clockwise manner, around the centre island -- still, traffic coming from the right, i.e., entering the roundabout, has priority; and one bearing the roundabout sign combined with a yield sign, where traffic already on the roundabout has priority over entering traffic (coming from the right).
 

Sotrax

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(Well, talking about traffic rules, only a roundabout sign in germany is not permitted through VwV-StVO. So, what are you talking about is technically correct, but this case in real life never occurs, only if the yield sign got stolen. So, by law, only a roundabout with the roundabout sign under a yield sign is a real roundabout, every other is just roundabout similar and needs additional signs.)
 

Metropolitan

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It used to be the case for most of their roundabouts but they've since mostly switched to the normal way apparently for most roundabouts. Maybe a French person can let us know. I mean, it is a monumentally bad idea after all. I've been around the arc de triomphe. I'm glad we were in a big bus that most people won't argue with.
Place de l'Étoile is indeed not a roundabout but a very old circus dating back to the 18th century.

Nowadays, trafic on Place de l'Étoile doesn't work exactly like the one of a roundabout and that's a good thing considering its excessive complexity. Among the 12 avenues joining there, two are major axis concentrating most of the traffic (counting in dozens of thousands of cars per day): the Champs-Élysées eastbound and the avenue de la Grande Armée westbound. As such, traffic inside the circle has to stop in order to allow the flow of cars from those two major avenues to get in, otherwise trafic would be completely stuck. I know it doesn't look optimal from outside but it seriously is. As a matter of fact, it couldn't work better.

This being said, Place de l'Étoile is a very unique intersection. We have thousands of roundabouts in France and they just works like normal roundabouts.
 

WilfriedWebber

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Oct 1, 2014
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So, by law, only a roundabout with the roundabout sign under a yield sign is a real roundabout, every other is just roundabout similar and needs additional signs.
That is wrong, and here's the proof:

Zu Zeichen 215 Kreisverkehr
III. Die Zeichen 205 und 215 sind an allen einmündenden Straßen anzuordnen. Ist eine abweichende Vorfahrtregelung durch Verkehrszeichen für den Kreisverkehr erforderlich, ist Zeichen 209 (Rechts) anzuordnen.
This basically says that a roundabout that is signed with the "turn right" sign, and not the "roundabout" sign, is still a roundabout.
 

Sotrax

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That is wrong, and here's the proof:
Why is that wrong? I said that this needs additional signs, like the Zeichen 209 or Zeichen 211.

Man spricht im Verkehrsrecht nur von einem Kreisverkehr, wenn man Zeichen 215 unter 205 sieht. Bei allen anderen Variationen spricht man nur von kreisförmigen Verkehren, und sie bedürfen Zeichen 209-20 bei der Einfahrt und Zeichen 211 auf der Mittelinsel, die Vorfahrt kann variieren und muss zusätzlich geregelt werden.
 

WilfriedWebber

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Why is that wrong? I said that this needs additional signs, like the Zeichen 209 or Zeichen 211.

Man spricht im Verkehrsrecht nur von einem Kreisverkehr, wenn man Zeichen 215 unter 205 sieht. Bei allen anderen Variationen spricht man nur von kreisförmigen Verkehren, und sie bedürfen Zeichen 209-20 bei der Einfahrt und Zeichen 211 auf der Mittelinsel, die Vorfahrt kann variieren und muss zusätzlich geregelt werden.
This is not a quote from VwV-StVO.

Also, the "turn right" sign is not an addition, but an alternative.
 

Metropolitan

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Do they never turn the lights off so the signs apply?
Which signs? There's no sign. If lights would be off, police officers would take the relay and do the job by hand.

Place de l'Étoile can't work as a roundabout. If you don't prioritize avenue de la Grande Armée and avenue des Champs-Élysées, the traffic would get stuck. Traffic flows are just too heavy for the circus to work properly as a roundabout.
 

WilfriedWebber

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Oct 1, 2014
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Which signs? There's no sign. If lights would be off, police officers would take the relay and do the job by hand.

Place de l'Étoile can't work as a roundabout. If you don't prioritize avenue de la Grande Armée and avenue des Champs-Élysées, the traffic would get stuck. Traffic flows are just too heavy for the circus to work properly as a roundabout.
I took a look at that place on Google's StreetView, and the only traffic lights are those before and after a few zebra crossings on the two avenues, but there is no actual regulation of traffic on the circus, also no traffic lights in the side streets.
 

Metropolitan

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I took a look at that place on Google's StreetView, and the only traffic lights are those before and after a few zebra crossings on the two avenues, but there is no actual regulation of traffic on the circus, also no traffic lights in the side streets.
Yes indeed. The traffic on the circus is paced by the traffic lights injecting flows of vehicles from the Champs-Élysées and Grande Armée... There is no traffic light within the circle, but when you have an army of vehicles getting inside the circle in front of you, you just stop and let them go. Both avenues are the major sources of vehicles coming in the circle, and vehicles coming and going to those never crosses each others. It's only the "minor" traffic going from or to other avenues which has to wait.

As a matter of fact, it's very intuitive, you don't really have to think about it. It's also much safer than we can imagine in the first place.
 
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