California Code, Vehicle Code - VEH § 31305

(a) Upon receipt of a written petition from a local jurisdiction or motor carrier adversely affected by a restriction or prohibition adopted pursuant to Section 31304, the Department of the California Highway Patrol may preempt any local restriction or prohibition that, in its opinion, is not compatible with reasonable and necessary access or the use of highways when no other lawful alternative exists as provided for in paragraph (3) of subdivision (a) of that section, or through transportation as provided for in paragraph (4) of subdivision (a) of that section.

(b) Upon receipt of a written petition from a local jurisdiction or motor carrier adversely affected by a preemption issued pursuant to subdivision (a), the Department of the California Highway Patrol, after holding a public hearing, shall render a decision upholding or denying the petition.

(c) This section shall become operative on January 1, 1987.