Veh. Code, § 35714

No ordinance adopted pursuant to Section 35712 shall be effective with respect to:

(a) Any vehicle which is subject to the provisions of Article 2 (commencing with Section 1031) of Chapter 5 of Part 1 of Division 1 of the Public Utilities Code.

(b) Any highway, any portion of which is also under the jurisdiction of a city, unless the consent of the governing body of the city is first obtained.

(c) Any commercial vehicle coming from an unrestricted highway having ingress and egress by direct route to and from the restricted highway when necessary for the purpose of making pickups or deliveries of goods, wares, and merchandise from or to any building or structure located on the restricted highway or for the purpose of delivering materials to be used in the actual and bona fide repair, alteration, remodeling, or construction of any building or structure upon the restricted highway for which a building permit has previously been obtained.

(d) The operation of ambulances or hearses.

(e) Any vehicle owned, operated, controlled, or used by a public utility in connection with the construction, installation, operation, maintenance, or repair of any public utility facilities.

(f) Any state highway, until the proposed ordinance has been submitted by the board of supervisors of the county to and approved in writing by the Department of Transportation. In submitting a proposed ordinance to the department for approval, the board of supervisors shall designate therein, an alternate route for the use of the vehicles which shall remain unrestricted by any local regulation as to commercial vehicles so long as the ordinance proposed shall remain in effect. The approval of the proposed ordinance by the Department of Transportation shall constitute an approval by the department of the alternate route so designated.

(g) Vehicles operated as an incident to any industrial, commercial or agricultural enterprise conducted within the boundaries of the unincorporated residential subdivision area.