I stole this from the comments. I can't really add more.
Originally Posted by somebody from VV's linked article
"After seeing what happens when those in the US are presented with simple traffic circles, which really are a good idea to keep traffic moving, though they require drivers to pay attention, understand the concept, plan ahead, AND know where they are going (rendering them a class 1 hazard, of course), these will result in instant gridlock."
__________________
“Life is not one damned thing after another. Life is one damned thing over and over.”
Edna St. Vincent Millay