8/3/15 2:35 AM (MST)

Active Chain Laws & Restrictions

Severe Restriction   Twin Tunnels Work
I-70 Eastbound / Westbound Veterans Memorial Tunnels (east of Idaho Springs) (Milemarker 242-243)

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

Avoid Sunday Ski Traffic Delays

Dotsero West Lot at Exit 133 is now open to all trucks on Sundays and Holiday Mondays from 10AM to 7PM. Restrooms facilities are available.


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.

Full Text