(a) Vehicles using alleys within the City, shall proceed east in alleys running east and west, and north in alleys running north and south, unless otherwise designated.
(b) No such alleys upon which any business premises abuts shall be obstructed in whole or in part in any manner except for such time as is reasonably necessary to load or unload.
(c) Whoever violates any provision of this section is guilty of a minor misdemeanor on a first offense; on a second offense within one year after the first offense, the person is guilty of a misdemeanor of the fourth degree; on each subsequent offense within one year after the first offense, the person is guilty of a misdemeanor of the third degree.