Bicycles on sidewalks and crosswalks.

(a) A person propelling a bicycle upon and along a sidewalk, or across a roadway upon and along a crosswalk, shall yield the right-of-way to any pedestrian and shall give an audible signal before overtaking and passing such pedestrian. (b) A person shall not ride a bicycle upon and along a sidewalk, or across a roadway upon and along a crosswalk, where such use of bicycles is prohibited by official traffic-control devices. (c) A person propelling a vehicle by human power upon and along a sidewalk, or pushing a bicycle across a roadway upon and along a crosswalk, shall have all the rights and duties applicable to a pedestrian under the same circumstances.