Starting in September 2022, all commercial vehicles traveling on Interstate 70 between Dotsero and Morrison will be required to have snow chains in their possession during the winter months. This new law, implemented by the Colorado Department of Transportation (CDOT), aims to improve safety and prevent road closures due to unfavorable weather conditions.


The requirement will be in effect from September 1 through May 31 each year. This applies to vehicles weighing 16,001 pounds or more and is not required for trailers. Commercial vehicle owners who do not comply with this law may face penalties including fines and possible loss of license.


How drivers will be notified:


Drivers will be notified in many different ways via interstate message boards, 511 traveler information, the COTrip website, and media outlets. 


What drivers need to do:


According to the Colorado Department of Transportation, “Chains must consist of two circular metal loops, one on each side of the tire, connected by not less than 9 evenly-spaced chain loops across the tread. Commercial vehicles that have 4 or more drive wheels must chain 4 wheels. Dual tire chains are acceptable.”


The chains must be tight enough to provide traction, but not so tight that they cause damage to the tire or vehicle. It is important to regularly check and adjust the tension of the chains while driving.


Additionally, it is important to remove the chains once they are no longer needed for driving on snowy or icy roads. Leaving them on for extended periods of time can lead to wear and tear on the tires.


When not in use, it is recommended to store chains in a cool, dry place to prevent rusting. Proper maintenance and care of chains can ensure their effectiveness and longevity.


Taking Safety Seriously


This rule is just one of many steps being taken by CDOT to ensure safe driving conditions for all travelers in Colorado’s often unpredictable mountain regions. For more information on this and other laws, visit the CDOT website or contact their offices. Stay safe on the roads this winter and be prepared for any weather conditions.