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Commercial Vehicle Permits

This site is designed to provide information about rules and obtaining permits for moving extra-legal vehicles and loads through Colorado. Extra Legal Vehicles are those vehicles exceeding size and weight restrictions on Colorado Highways and Interstates.

Truck on Highway

Please Note:

**CDOT'S STAFF BRIDGE UNIT IS UPDATING THE BRIDGE WEIGHT MAP. As a result of the work in progress, there have been several upgrades and downgrades of bridge weight ratings. CDOT will continue to list updates to the bridge weight map on the "Changes to Existing Maps" tab located at the Restrictions & Maps page until such time as the review is complete and the new map is posted. Feel free to contact our office at any time with questions you may have on this subject. 

** The CDOT Permit Office has launched a new oversize/overweight permitting system. The new system (COOPR) is located at 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.

All applications need to be placed in COOPR for processing. EFFECTIVE July 1, 2015, the CDOT permit office will no longer accept OSOW permit applications by fax. Please submit all OSOW permit applications at 

** Chain Law in effect - September 1, 2015 - May 31, 2016.

Commercial vehicles operating on I-70 in either direction between mileposts 133 (Dotsero) and 259 (Morrison) must carry sufficient chains at all times to be in compliance with the Colorado chain law. Colorado Chain Up Tips and CSP TireChain Requirements

** Office Closure - The Permit Office will be closed on Monday, September 7, 2015 in observance of Labor Day. Holiday restrictions.

** DOT numbers are issued by the Federal Motor Carrier Safety Administration for Interstate carriers and by the Colorado State Patrol, Motor Carrier Safety for Intrastate carriers.

Interstate carriers may contact the FMCSA at (720) 963-3130.

Colorado based carriers may contact the CSP at (303) 273-1875.

** Commercial Driver's License (CDL) Information Regarding the New Medical Certification Requirements - Link to Colorado Department of Revenue's Website

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 3:00 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 vehicles must contact E-470 at (303) 537-3700 for travel on E-470. This contact must be made at least 48 hours prior to movement.

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Truck Permit Office

CDOT Permit Office
4201 East Arkansas Avenue, Rm 124
Denver, Colorado 80222
Long Distance: 1-800-350-3765
Local Calls: 303-757-9539

Office Hours:
Monday - Friday 7:30 am - 4:30 pm
Phone calls accepted 7:30 am - 4:30 pm
Walk-Ins until 4:00 pm
Note: Permit Staff Meetings are typically scheduled on
Thursdays, 10:00 am - 10:30 am (MT)

Suggestions to help us improve our service?
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