Section 21970 - Prohibited blocking of crosswalk or sidewalk by vehicle(a) No person may stop a vehicle unnecessarily in a manner that causes the vehicle to block a marked or unmarked crosswalk or sidewalk.(b) Subdivision (a) does not preclude the driver of a vehicle facing a steady circular red light from turning right or turning left from a one-way street onto a one-way street pursuant to subdivision (b) of Section 21453.Added by Stats 2000 ch 833 (AB 2522), s 11, eff. 1/1/2001.