Passenger Vehicle Traction and Chain Laws

Overview

When weather conditions warrant, CDOT implements Traction and Chain Laws. Motorists will be alerted to an active Traction Law or Chain Law by highway signage, COtrip.org and traffic/roadway condition alerts. 

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Traction Law Update

A safe vehicle and quality tires with adequate tread are crucial for winter driving. Morrison to Dotsero on I-70 between Sept. 1 and May 31, or if conditions require, these laws could be enforced with fines.

During winter storms, or when conditions require, CDOT will implement the Passenger Vehicle Traction (PVT) law. CDOT can implement traction and chain laws on any state highway. During a traction law, passenger vehicles are required to have tires with 3/16” tread depth that are rated “all weather” or winter tires (mountain-snowflake icon or M+S or M/S) or carry chains or an approved alternative traction device. CDOT highly recommends driving an AWD or 4WD vehicle in the mountains whenever possible.

Passenger Vehicle Chain Law Updates

During severe winter storms, CDOT will implement the passenger vehicle chain law. This is the final safety measure before the highway is closed.

When the passenger vehicle chain law is in effect, every vehicle must have chains or an approved alternative traction device.

Fines

The penalty for failing non-compliance includes a $100 fine and $33 surcharge. Failing to comply with restrictions that resulted in a road closure of a travel lane in one or more directions can include a $500 fine and a $157 surcharge.

Have questions? Visit CDOT's Winter Wise Frequently Asked Questions page!