In Paris, the most traffic-heavy roundabout (place de l'Étoile, around the Arc the Triomphe) has different rules from most others, cars on the roundabout must y

In Paris, the most traffic-heavy roundabout (place de l'Étoile, around the Arc the Triomphe) has different rules from most others, cars on the roundabout must yield to those entering. I'm not sure it improves safety, but I think it helps preventing gridlock. My experience in Nantes, a city with a lot of roundabouts (know for double roundabouts[1] and square roundabouts[2]) is that double roundabouts seem a bit better when there is congestion. Usually when there is congestion on a roundabout, people on the roundabout will let every other waiting entering car pass before them, anyway. I think it works quite well. [1] https://www.google.fr/maps/place/Rond-Point+de+Rennes,+44300+Nantes/@47.233208,-1.5658135,95m/data=!3m1!1e3!4m2!3m1!1s0x4805ec28af251093:0x9caf62dc692ae757 https://www.google.fr/maps/place/Rond-Point+de+Rennes,+44300... [2] https://www.google.fr/maps/place/Place+du+G%C3%A9n%C3%A9ral+Sarrail,+44400+Rez%C3%A9/@47.1944149,-1.545901,95m/data=!3m1!1e3!4m2!3m1!1s0x4805e94f78a10c13:0x9db3b79039ced826 https://www.google.fr/maps/place/Place+du+G%C3%A9n%C3%A9ral+...