Active Chain Laws & Restrictions
I-70 Eastbound / Westbound Glenwood Canyon (Milemarker 116.37-133)
Twin Tunnels Blasting
I-70 Eastbound Idaho Springs (Milemarker 239.69-253.52)
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.
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.
Exit 133 West lot 65 spaces.
Exit 133 Eastbound Frontage Road Shoulder 40 spaces 2.5 miles east from off-ramp. Return to I-70 at Gypsum exit 140.
Statewide, the fine for not chaining up when the chain law is in effect is $500 plus a $79 surcharge.
The fine for not chaining up and subsequently blocking the highway is $1000 plus a $157 surcharge.
Entire Law Text
Chain Assistance Program
CSP Chain Up Tips
Chain Up Video
Hazardous Materials Routes
Intrastate USDOT Numbers
USDOT Truck Numbers
I-70 Truck Parking Guide
Rest Areas (Map)
CDOT Maintained Park n Rides (Map)