Roundabout (Single / Multi-Lane)
INT-RAB-028 Intersections & CrossingsRoundabout (Single / Multi-Lane)
A circular intersection where entering traffic yields to the circulating flow, sized single or multi-lane to the volume it carries.
Typical at: Suburban Compact Urban Core
Rural is an edge case. Undeveloped is an unlikely pairing.
#Design notes
Roundabout is the default control wherever two Collector-or-higher streets meet within the Commonway System's intersection philosophy. Traffic signals remain available but only as a documented last resort, and turbo-roundabouts take over at the highest-volume Arterial-to-Arterial junctions.
Unsourced claim
Formal citations for this pattern have not yet been compiled from primary sources.