Commercial vehicle chain law & Passenger vehicle traction law:
US 285 in both directions between FS Rd 56 and Geneva Creek (Kenosha Pass).
Chains or alternative traction devices required for all commercial motor vehicles including buses and vans of 16 or more passengers.
Passenger vehicles are required to have mud or snow tires or use chains or alternative traction devices or be a four wheel drive or all wheel drive vehicle.
