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Commercial Vehicle Chain Law

Between September 1 and May 31 of each year, all commercial vehicles traveling on I-70 between Dotsero and Morrison must carry sufficient chains.  Commercial vehicles with a combined gross vehicle weight of 26,001 pounds or more are required to have four or more drive wheels covered with chains when the chain law is in effect.  For more information about the state's chain law as it applies to commercial vehicles, CDOT has created a fact sheet on commercial vehicle chain law.