Chain Law
Commercial Vehicles operating on I-70 in either direction between mileposts 133 (Dotsero) and 259 (Morrison) from Sept. 1 to May 31 must carry sufficient chains at all times to be in compliance with the Colorado chain law.
Chain Up tips

Dotsero Emergency Parking
During an incident or severe weather event, CDOT may allow additional emergency parking at various locations west of milepost 133. There is no truck parking east of Milepost 133 or in the Vail Valley. Trucks waiting out a chain law or Vail Pass closure should not proceed past Dotsero - exit 133.
Area Description Spaces
Exit 133 West Lot 65
Exit 133 Eastbound Frontage Road Shoulder. 2.5 miles east from off-ramp. Return to I-70 at Gypsum Exit 140. 40

Fine Schedule
Violation Fine Surcharge
Not chaining up when chain law is in effect $500 $79
Not chaining up when chain law is in effect and subsequently blocking the highway $1000 $157
Points to information table
Points to information table