Road Conditions and Web CAMS

Caltrans Information

Local Web CAMS

Road Conditions by Phone

  • CHP Yreka: (530) 842-4438
  • Weather Bureau: (530) 221-5613
  • Cal Trans: (800) 427-7623
  • Oregon Roads: (503) 588-2941

Snow Chain Requirements

  • R1 - 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. Chains must be carried by vehicles using snow tires. All vehicles towing trailers must have chains on one drive axle. Trailers with brakes must have chains on at least one axle.
  • 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. NOTE: four-wheel/all-wheel drive vehicles must carry traction devices in chain control areas.
  • R3 - Chains required - Chains or traction devices are required on all vehicles, no exceptions.
  • R-1 and R-2 are the most common chain controls. Highways will often be closed before an R-3 control is imposed.