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CA Trailer Laws Regulations California Trailer Laws & Trailer Regulations

California's laws and regulations for trailers are listed below:


California Trailer Brake Laws

Every trailer and semitrailer manufactured after 1940 with a GVW of 6,000 lbs. or more and operated at a speed of 20 mph or more must be equipped with brakes; trailers and semitrailers built after 1966 and with a GVW of 3,000 lbs. or more must have brakes on at least 2 wheels; every trailer or semitrailer built after 1982 and equipped with air brakes must be equipped with brakes on all wheels.

Every trailer coach or camp trailer with a GVW of 1,500 lbs. or more must be equipped with brakes on at least 2 wheels.



California Trailer Dimension Laws

Total length: 65 feet (includes bumpers); trailer length: 40 feet (includes bumpers); width: 102 inches (required light, mirrors, or devices may not extend more than 10 inches on each side of the vehicle. Door handles and hinges may extend 3 inches on each side of the vehicle); height: 14 feet. 



California Trailer Hitch Laws

Fifth wheel mechanisms and adapters must be equipped with a manual release locking device. 



California Trailer Signal Laws

The combination of vehicles towing a trailer coach or camp trailer must be equipped with a lamp-type turn signal system.

Trailers and semitrailers 80 or more inches in width and manufactured after January 1, 1969, must be equipped with a lamp-type turn signal system.

Any vehicle 80 or more inches in width must contain at least 1 amber clearance lamp on each side and at least 1 red clearance lamp on each side, as well as at least 2 amber and 2 red side-marker lamps on each side, and must carry at least 3 red emergency reflectors.

Every vehicle at the end of a combination of 2 vehicles must have at least 2 tail lights; trailers manufactured after July 23, 1973 and less than 30 inches wide may be equipped with 1 tail lamp.



California Trailer Lighting Laws

A motor vehicle towing a vehicle or trailer must be equipped with mirrors on both the left and right side which provide a view of at least 200 feet of the highway.



California Trailer Mirror Laws

Maximum speed for any vehicle towing another vehicle is 55 mph.



California Trailer Speed Limit Laws

Maximum speed for any vehicle towing another vehicle is 55 mph.



California Trailer Towing Laws





The United States Trailer Laws and Regulations by State by is not an inclusive list of laws, regulations and it should be used by reference only and not used for any other purpose. is not liable for incorrect or incomplete information. To report an error, incomplete or incorrect information, please send an email to





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