No person shall ride, drive, propel, or cause to be propelled any vehicle or animal across or upon any sidewalk except over permanently constructed driveways and except when it is necessary for any temporary purpose to drive a loaded vehicle across a sidewalk; provided, further, that the sidewalk area shall be substantially protected by wooden planks two inches thick, and written permission previously obtained from the public works director. Such wooden planks shall not be permitted to remain upon such sidewalk area during the hours from six p.m. to six a.m.
(Prior code § 11.24.040 (Ord. 581 8.3, 1965))