You must follow the directions on the signs posted for chain controls or any instructions given by Caltrans or CHP personnel at chain control check points, even if these are at variance with broadcast road condition reports or information contained herein.ġ Snow-tread Tires: The California Vehicle Code, Section 558 defines a snow-tread tire as follows, "A 'Snow-tread tire' is a tire which has a relatively deep and aggressive tread pattern compared with conventional passenger tread pattern". Some local areas may use variations of these designations. A highway will often be closed before an R-3 condition is imposed. R-1 and R-2 are the most common conditions. Truckers, see our Truck Chain Requirements page. Requirement 3 (R3): Chains or traction devices are required on all vehicles, no exceptions.NOTE: (Four-wheel/all-wheel drive vehicles must carry traction devices in chain control areas.) Requirement 2 (R2): Chains or traction devices are required on all vehicles except four-wheel/all-wheel drive vehicles with snow-tread tires on all four wheels.Trailers with brakes must have chains on at least one axle. All vehicles towing trailers must have chains on one drive axle. Chains must be carried by vehicles using snow tires. Requirement 1 (R-1): Chains are required on all vehicles except passenger vehicles and light-duty trucks under 6,000 pounds gross weight and equipped with snow tires on at least two drive wheels.There are Three Levels of Chain Requirements in California: When chain controls are established, signs will be posted along the road indicating the type of requirement. Chain Requirement Levelsĭuring the winter months, motorists may encounter traction chain controls in the mountain areas within California. It is best to check your vehicle manufacturer's specifications for use of tire chains/traction devices.Ĭhain Installation Chart (PDF) depicting the proper placement of traction devices for all vehicles. The California Department of Transportation (Caltrans) does not sell nor recommend specific brands of tire chains.
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