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Commercial Vehicle Permits

Check out our new website.   

Don't Miss Critical Travel Alerts

CDOT has launched a new travel alerts system, and if you're among the thousands of truck drivers who signed up to receive text alerts about chain law enforcement, oversize/overweight restrictions and more, you must create a new account to continue receiving these messages.

Get started by visiting For step-by-step instructions, visit

Truck on Highway

This site is designed to provide information about the rules and regulations of and how to obtain permits for moving extra-legal vehicles and loads through Colorado.

Extra-legal vehicles and loads are those vehicles and loads exceeding legal size and weight limits on Colorado interstates and highways.

SPECIAL EVENTS:  WEATHER ALERT: Heavy Mountain Snows expected through Saturday with persistent west/northwest winds. NWS is projecting the possibility of up to 2 feet of snow in areas such as Eisenhower Tunnel, Berthoud Pass, Vail Pass, Cameron and Rabbit Ears Passes and the Grand Mesa with diminishing totals for southern mountain ranges. Front Range and lower elevations: Additional snow possible through Friday possibly moving east to the plains. Winds may cause issues with blowing and drifting. TRUCKERS: Chains or alternate traction devices will be required for mountain travel. REMINDER: NO MOVEMENT ALLOWED FOR ANY OVERSIZED LOADS DURING INCLEMENT WEATHER. DRIVERS MUST BE PREPARED FOR EXTENDED CLOSURES, EXTREME WEATHER AND HEAVY TRAFFIC ON I-70, US 285 AND OTHER MOUNTAIN ROUTES. THERE WILL BE EXTENDED CLOSURES ON I-70 AND US40 FOR AVALANCHE CONTROL FRIDAY MORNING AND THE POTENTIAL FOR CLOSURES THROUGH THE WEEKEND.


CDOT is now offering online interactive Pilot Escort certification classes through and Evergreen Safety Council

All state highway structures with less than 14'6" vertical clearance may be found online.

Please Note:

** The CDOT Permit Office has launched a new oversize/overweight permitting system (COOPR).. Please update your bookmarks.

COOPR allows for 24/7 access, fleet management and self-issue capabilities on some permits, and a routing component to assist annual permit holders with determining safe routing for their loads. CDOT no longer accepts applications by fax.

** Chain Law in effect - Sept. 1 - May 31 **

Commercial vehicles operating on I-70 in either direction between mile points 133 (Dotsero) and 259 (Morrison) must carry sufficient chains at all times to be in compliance with the Colorado Chain Law.


** DOT numbers are issued by the Federal Motor Carrier Safety Administration.

Carriers may contact the FMCSA at 720-963-3130.

Important Reminder:

  • The new permit system has decreased the turn-around time for the issuance of oversize/overweight permits. We will not guarantee that applications received after 3 p.m. (MT) will be processed on the same business day. Applications are processed in the order in which they are received.

Our busiest days of the week are typically Mondays and Fridays. We recommend that applications be submitted early in the day to avoid delays.

E-470 Restrictions/Permits

All extra-legal vehicle drivers must contact E-470 at 303-537-3727 for travel on E-470. This contact must be made at least 48 hours prior to movement.

Colorado: The Official State Web Portal