U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
Diagram of a mini-roundabout, the design of which features a central island sized to provide deflection for passenger cars and that allows trucks to pass over it, an entrance line and splitter island defined by inscribed circle diameter or by swept path of large vehicles, a splitter island that is mountable or painted yellow, and a marked boundary of hte inscribed circle.