Colorado CMV Compliance Guide
CO DOT regulations for commercial motor vehicles
CDOT Commercial VehiclesOfficial CO DOT websiteOverview
Colorado's commercial vehicle enforcement is managed by the Colorado State Patrol (CSP) and CDOT. The state's mountainous terrain presents unique challenges for commercial vehicle operations including steep grades on I-70 through the Eisenhower Tunnel, chain law requirements, and mandatory brake checks. Colorado is also a key freight corridor between the Midwest and West Coast.
Inspection & Enforcement Program
Colorado operates permanent ports of entry on major highways and deploys mobile inspection units. The CSP Hazardous Materials/Motor Carrier Safety Section performs Level I through Level III inspections. The state is particularly focused on brake performance due to the mountainous terrain and has dedicated brake inspection sites at the top of major grades.
Weight Limits & Oversize/Overweight
Colorado follows federal weight limits of 80,000 lbs GVW on Interstate highways. The state has a specific permit system for overweight loads and restricts certain oversize loads from mountain passes during winter months. Colorado's bridge formula may impose lower limits on specific structures. Chains or adequate traction devices are required by law (the Traction Law and Chain Law) on I-70 in the mountains during winter.
Colorado-Specific Requirements
- Colorado's Chain Law (Code 15) requires commercial vehicles to carry and use chains on I-70 in the mountains when conditions warrant. Fines for non-compliance start at $500 and increase if a chain-law violation causes a road closure.
- The state requires mandatory brake checks for vehicles descending major mountain grades, with runaway truck ramps available on steep descents.
- Colorado enforces the Eisenhower Tunnel restrictions: no hazmat loads, specific height/width limits, and escort requirements for certain oversize loads.
- The state has specific idle-time restrictions in the Denver metropolitan area for emissions control.
Contact
CSP Motor Carrier Safety: (303) 273-1875
Federal Requirements That Apply in Colorado
In addition to Colorado-specific regulations, all federal DOT and FMCSA requirements apply to commercial vehicles operating in CO. These guides cover each federal requirement in detail:
This information is provided as a general reference. State regulations change frequently. Always verify current requirements with the Colorado DOT or your compliance advisor before relying on any information presented here.