The School Bus Entrance sign indicates to drivers that they are approaching a location at which school buses are entering, leaving or crossing the road and where an unusual maneuver or physical condition such as inadequate sight distance or steep grades presents an uncommon degree of hazard. This sign should only be used if relocation of the bus entrance to a location with adequate physical conditions is not practicable or feasible.

The appropriate right or left version indicates the direction from which school buses enter the road.

This sign may be used only for school buses. It must not be used for other types of buses. The sign must not be used in place of Concealed Road signs
(WA-11, WA-12, WA-13).

The supplementary tab sign (WA-30S) may be used to indicate the distance to the school bus turning movement.