A roundabout needs two lanes and plenty of space in order to function well. If you don't have enough room for that, stoplights will work better.
From our local newspaper -
Town recognized for new roundabout
The Northern/Hardy Roundabout in Oro Valley was selected as the Outstanding Small Project of the Year by Arizona's chapter of the American Public Works Association.
The five-way roundabout traffic circle at West Hardy Road and North Northern Avenue was completed in the summer of 2010 for about $800,000.
The project will be recognized at an award banquet March 30.