Signal
INT-SIG-030 Intersections & CrossingsSignal
Typical at: Compact Urban Core
Suburban is an edge case. Undeveloped and Rural are unlikely pairings.
Note
Signal remains available within the Commonway System, but only as a last resort requiring documented burden-of-proof justification, modeled on WSDOT's Roundabout First and Intersection Control Evaluation policy. It is not banned, just never presumed. Where a roundabout or turbo-roundabout can serve the same volume, that is the default choice instead.
#Design notes
Signal's realistic density range overlaps heavily with Roundabout and Turbo-Roundabout, since all three ultimately compete for the same higher-volume intersections. The difference is which one the Commonway System treats as the presumed choice absent a documented reason otherwise.
Unsourced claim
Formal citations for this pattern have not yet been compiled from primary sources.