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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:

** 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. If you have any questions, please contact the CDOT Permit Office during normal business hours. 

** Chain Law in effect - September 1, 2014 - May 31, 2015.

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, May 25, 2015 in observance of Memorial Day. Holiday restrictions.

The office will reopen on Tuesday, May 26, 2015, at 7:30 a.m. and we will process applications in the order in which they were received. Please allow the staff time to process the applications before requesting permit status checks.


** CHAPTER 6 SPECIALS - Please allow 2-3 weeks for the Permit Office to process Chapter 6 Special Permits.  Due to a shortage of staff in the Bridge section and an increase in applications, we are requesting that all applications and supporting documentation be submitted well in advance so the applications can be put in the queue to be processed.

** 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 Permit Office has a 2-hour turn around time for the issuance of Oversize/Overweight Single Trip 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
Fax:  303-757-9719

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)

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