City of San Mateo Law Library
City of San Mateo Municipal Code.

11.56.100 RIDING - ON ROADWAY OR SIDEWALK.

(a) Any person operating a bicycle upon a roadway at a speed less than the normal speed of traffic moving in the same direction at the time shall ride as close as practicable to the right-hand curb or edge of the roadway except under any of the following situations:

(1) When overtaking and passing a vehicle proceeding in the same direction.

(2) When preparing for a left turn at an intersection or into a private road or driveway.

(3) When reasonably necessary to avoid conditions (including, but not limited to, fixed or moving objects, vehicles, bicycles, pedestrians, animals, surface hazards, or substandard width lanes) that make it unsafe to continue along the right-hand curb or edge, subject to the provisions of California Vehicle Code Section 21656. For purposes of this section, a "substandard width lane" is a lane that is too narrow for a bicycle and a vehicle to travel safely side by side within the lane.

(b) Any person operating a bicycle upon a roadway of a highway, which highway carries traffic in one direction only and has two (2) or more marked traffic lanes, may ride as near the left-hand curb or edge of that roadway as practicable.

(c) It is unlawful for any person to ride or operate a bicycle, motor driven cycle or motor scooter upon any sidewalk or upon any overhead pedestrian crossing over any street, roadway, State highway or State freeway that is signed for pedestrian use only within the City.