Cal. Vehicle Code § 35655.6

(a) Except as provided in subdivision (b), a person shall not drive a commercial vehicle with three or more axles, or a gross vehicle weight or a combined gross weight of 9,000 pounds or more, on the segment of State Route 2 (SR-2) that is located between Interstate Route 210 (I-210) in the City of La Canada Flintridge and County Route N4 (Big Pine Highway) in the County of Los Angeles. (b) Subdivision (a) does not apply to any of the following vehicles: (1) An authorized emergency vehicle. (2) A vehicle operated by a publicly or privately owned public utility. (3) A vehicle operated by a government agency. (4) A transit bus servicing facilities accessible only from that portion of State Route 2 specified in subdivision (a). (5) A tow truck providing assistance to a vehicle that is accessible only from that portion of State Route 2 specified in subdivision (a). (6) A commercial vehicle making deliveries to or from, or servicing, property that is either of the following: (A) Located within the city limits of the City of La Canada Flintridge. (B) Is accessible only from the portion of State Route 2 specified in subdivision (a). (7) A commercial vehicle involved in a motion picture, commercial, or television production conducting motion picture, commercial, or television production activities in areas that are accessible only from that portion of State Route 2 specified in subdivision (a). (c) A person who violates this section shall, upon conviction, be punished by a fine pursuant to subdivision (a) of Section 42030 or one thousand dollars ($1,000), whichever is greater. (d) The Department of Transportation shall erect suitable signs at each end of the portion of State Route 2 specified in subdivision (a) and any other points that the department deems necessary to give adequate notice of the prohibition pursuant to this section.