JUST A REMINDER, DO NOT BRING UP THE U.S. CONSTITUTION IN COURT. "the Constitution doesn’t apply to Americans, it doesn’t apply to citizens, it doesn’t even apply to "people." It applies to the federal government." 

The body of the Constitution tells the federal government what it is allowed to do,


The Federal Government "The United States" can only regulate interstate commerce.

California Vehicle Code § 21001

C.V.C. § 21001 Local authorities may adopt rules and regulations by ordinance or resolution regarding all of the following matters:

(a) Regulating or prohibiting processions or assemblages on the highways.

(b) Licensing and regulating the operation of vehicles for hire and drivers of passenger vehicles for hire.

(c) Regulating traffic by means of traffic officers.

(d) Regulating traffic by means of official traffic control devices meeting the requirements of Section 21400. 

C.V.C. § 34500. --The department shall regulate the safe operation of the following vehicles:

(a) Motortrucks of three or more axles that are more than 10,000 pounds gross vehicle weight rating.

(b) Truck tractors.

(c) Buses, schoolbuses, school pupil activity buses, youth buses, farm labor vehicles, modified limousines, and general public paratransit vehicles.

(d) Trailers and semitrailers designed or used for the transportation of more than 10 persons, and the towing motor vehicle.

(e) Trailers and semitrailers, pole or pipe dollies, auxiliary dollies, and logging dollies used in combination with vehicles listed in subdivision (a), (b), (c), (d), or (j). This subdivision does not include camp trailers, trailer coaches, and utility trailers.

(f) A combination of a motortruck and a vehicle or vehicles set forth in subdivision (e) that exceeds 40 feet in length when coupled together.

(g) A vehicle, or a combination of vehicles, transporting hazardous materials.

(h) Manufactured homes that, when moved upon the highway, are required to be moved pursuant to a permit as specified in Section 35780 or 35790.

(i) A park trailer, as described in Section 18009.3 of the Health and Safety Code, that, when moved upon a highway, is required to be moved pursuant to a permit pursuant to Section 35780.

(j) Any other motortruck not specified in subdivisions (a) to (h), inclusive, or subdivision (k), that is regulated by the Department of Motor Vehicles, the Public Utilities Commission, or the United States Secretary of Transportation.

(k) A commercial motor vehicle with a gross vehicle weight rating of 26,001 or more pounds or a commercial motor vehicle of any gross vehicle weight rating towing a vehicle described in subdivision (e) with a gross vehicle weight rating of more than 10,000 pounds, except combinations including camp trailers, trailer coaches, or utility trailers. For purposes of this subdivision, the term “commercial motor vehicle” has the meaning defined in subdivision (b) of Section 15210.

(Amended by Stats. 2016, Ch. 208, Sec. 24. (AB 2906) Effective January 1, 2017.)