Comment New Jersey Just FInished Removing Them (Score 1) 1173
Until the 1990's, the main route between Philadelphia and Atlantic City had at least two Roundabouts. The earliest time I remember seeing them was during the late 1950's as a passenger in my parent's car. So, this is not a new invention this side of the Pond, but an old one that has been tried and abandoned after decades of use. I had the opportunity to drive this route before they were both redesigned, and I can tell you that the design is only effective when traffic is very minimal. It's extremely hazardous with high traffic volume.
The State of New Jersey clearly knows this, as does any American driver who has experienced what I believe is a misguided attempt at a "Can't we all get along" society. If you've ever seen the original Death Race 2000 movie, or played the Carmageddon series of video games, then you know what the highways are like in the Philadelphia area.
Properly configured traffic lights are much preferred to the risk of physical harm the Roundabout represents.
IMHO, YMMV