Colorado Truck Speed Limit
No split in Colorado. Trucks run 75 on rural interstates and 65 on other divided highways, same as cars (C.R.S. 42-4-1101). The Colorado rule that actually bites a trucker is not speed, it is the I-70 chain law and the lower-gear and runaway-ramp requirements on the grades west of Denver.
How fast a truck can run in Colorado
No split in Colorado. Trucks run 75 on rural interstates and 65 on other divided highways, same as cars (C.R.S. 42-4-1101). The Colorado rule that actually bites a trucker is not speed, it is the I-70 chain law and the lower-gear and runaway-ramp requirements on the grades west of Denver.
Truck-specific rules and quirks
- Colorado does not split truck speed, but the I-70 mountain corridor carries a chain law and minimum-speed and lower-gear rules on the big grades west of Denver.
What a speeding ticket costs
Speeding is a graduated fine. A truck too slow on a mountain grade can also draw a ticket, and work-zone fines double.
Colorado Truck Speed Limit FAQ
What is the truck speed limit in Colorado?
Do trucks have a lower speed limit than cars in Colorado?
What is the speeding penalty for a truck in Colorado?
Reference information for planning, not legal advice. Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it. Last reviewed July 2026. Source: https://www.iihs.org/topics/speed/speed-limit-laws. See our Terms & Disclaimer.
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