California Highway Patrol
Alturas (170)
905 West C St., Alturas
(530) 233-2919 http://www.chp.ca.gov/
Snow Chain Requirements
R1 (Modified) - Single Axle Trucks
R1 - All Trucks & Vehicles without snow tires.
R2 - All Single Axle Trucks & Vehicles with snow tires.
R3 - All Trucks & Vehicles & 4x4s with snow tires.