Two Lanes? There are ten at the Place de l'Étoile in Paris going around the Arc de Triomphe.

Navigating the rotaries in Boston is not so bad if everyone follows the rules.
There is really just one thing to remember...those on the left have the right of way.

On the way into Cambridge just going under the overpass coming off the BU Bridge.
The clip was taken with the Blackvue dashcam mounted on the Boxster:
[youtu.be]

Inevitably, vehicles in the inner lane have to move out and to the right, with the right rear blind, (or at least limited view) spot being exacerbated by the curvature. The "reference" perception of cars in that limited view field is shifting as the outside background beyond them is spinning past at a higher rate than it would be on a straight road. All the while one's brain is processing the mirror image. Another situation (just had this occur a few days ago) is when you're in the inner lane so as to stay clear of vehicles entering farther along,* yet at 180º you have to move right to get off, but someone in the right lane who got in later is continuing around and cuts you off. Many circles are moving at a higher speed than the rotating traffic jam in the video, too.

* Do a Google Maps search of "Kingston Traffic Circle, Interstate 587, Kingston, NY" satellite view with labels, and zoom in to see the example. Try coming into it from the "Onteora Trail" from the northwest and then get on the Thruway entrance 270º around. Especially when you're surrounded by a bunch of old hippies coming out of Woodstock after a night on the town. Oops, that's me!



Edited 4 time(s). Last edit at 09/20/2013 10:42AM by Laz. (view changes)

Which is why those on the left has the right of way...the driver of the car on the right is seated on the left side has a clearer view of that side and should yield if someone is coming up on his left.

traffic circles are worse in that there's much more for even the most well-intentioned drivers to process, and that's without throwing mobile device and in-car touch screen usage into the mix. Maybe we all want the world to be Platonic, but it all too often is Machiavellian. Not everyone moving through a traffic circle is a philosopher king.

Which is why we also have insurance coverage :-)

I lived in Paris for two years a long time ago. If you can go through the Place de l'Étoile at rush hour and survive you can call yourself a Parisian. Getting out of this giant roundabout is is an aquired skill that takes courage and some blind faith in the drivers on the right. Here is a link to some photos. Place Charles de Gaulle or Place de l'Étoile

Jeff Benson:

2016 Boxster, See it here: www.greatvalleyhouse.com/Boxster

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First car: 1952 Hudson Hornet

First roadster: 1962 Austin Healy 3000 III

Still have: Computer free 1974 MGB

Previous Porsches since 1982: 924, 944, 944S, and four Boxsters; 97, 03, 08 & 2012

take a look at that roundabout - very confusing. Roundabouts within a large roundabout - crazy. Here on PEI most drivers can't handle a simple 2 lane rotary. I experienced drivers stopping in the middle of the rotary to let other drivers in - came close to trash my boxster a couple of times.

[www.google.ca]