Jesper asked:
> Don't they make roundabouts in the US?
They aren't very common at all here, except in Washington, D.C., which, after
all, was designed by a Frenchman!
When they do occur, they are never called "roundabouts," but rather "circles" or
"traffic circles." The usual reason is to contain some sort of monument or
other ornament, and almost never to serve the flow of traffic. Lee Circle in
New Orleans would be a prime example of the monumental sort.
You must remember that the typical American city is laid out in a rectangular
grid. Therefore, circles would be more of a hindrance to the flow of traffic
than a help.
Mexico, on the other hand, has quite a devotion to circles, both as sites for
monuments and as traffic-flow devices.
Lowell G. McManus
Leesville, Louisiana, USA