As the lesser of the two levels, Traction Law requires all passenger vehicles to have at least one (1) of the following: snow tires, tires with mud/snow designation, 4WD/AWD, or chains/alternative traction devices. Regardless of which of the above items a vehicle has, tire tread must be at least 1/8 inch.
Passanger Vehicle Chain Laws
Passenger Vehicle Chain Law is rare, and the last-ditch effort before roads are completely shut down. When this law is in effect, every passenger vehicle on the roadway must have chains or alternative traction devices (like AutoSock).