Trucks actually engaged in the towing of houses or buildings upon any highway may display flashing amber warning lights to the front, sides or rear on the vehicle or load.
Cal. Veh. Code § 25263
Flashing and Colored Lights
Amended by Stats. 1961, Ch. 653.
Official source: California Legislative Information. Reproduced from public-domain California statutes; confirm against the official source for the current text. Not legal advice.