10.2.3.10 Roundabouts
Roundabouts are circular intersections that use either signals or yield control and channelizing islands to circulate traffic in a counterclockwise motion around and through an intersection. The channelizing islands provide a refuge for pedestrians. The geometric features of a roundabout deflect and slow approaching vehicles. Roundabouts are designed to varying sizes from a single-lane mini-roundabout with a 90-foot inscribed circle diameter to a multi-lane roundabout with a 200-foot inscribed circle diameter. An
example
of a roundabout is shown in . For more information about roundabouts (including example figures) and roundabout analysis, see Chapter 12
.
Figure 10-9: Roundabout Features
Source: Adapted from Virginia Department of Transportation, 03/05/2024