lane sharing

Riding to the right of and parallel to a line of motor traffic to the left within a wide travel lane, but not in the edge hazard zone. This is a subset of edge behavior that is relatively safer than riding in the edge hazard zone or near the edge of a lane that is not wide enough for side by side operation.  Normally lane sharing is used only in lanes wide enough for safe side by side operation of a motor vehicle and a bicycle, but it can be used in narrower lanes when passing is safe, to encourage passing.