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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

You can now receive oversize/overweight-related alerts through your email and phone (via text). To sign up go to:

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

Please Note:**CDOT now issues WASHTO Western Regional Permits (WRP). You may find the WRP Desk Guide at: The only vehicles/loads which are eligible are those which:

  1. Meet the size/weight envelope found in the WRP Desk Guide.
  2. The route must begin, end or travel through Colorado.


** 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. CDOT no longer accepts applications by fax.


** 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


** Holiday restrictions--No holidays restrictions until Memorial Day 2017.


** 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.

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 E. Arkansas Ave.
    Room 124
    Denver, CO 80222
    Long Distance: 1-800-350-3765
    Local: 303-757-9539

  • Office Hours:
    7:30 a.m. - 4:30 p.m.
    Monday - Friday
    Walk-ins welcome until 4 p.m.
    Note: Permit staff meetings are typically scheduled from 10-10:30 a.m. on Thursdays

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