Speed Limits
C.R.S. 42-4-1101 — reasonable and prudent first, then 25 in a business district, 30 in a residence district, and 65 on the interstate
No one may drive faster than is reasonable and prudent under the conditions, and a driver slows further when a special hazard exists from pedestrians, traffic, weather or the road.
Who handles this in Colorado: legal aid programs and the state offices, listed in the Colorado directory.
| Where | Lawful speed unless posted |
|---|---|
| WhereNarrow, winding mountain highways and blind curves | Lawful speed unless posted20 miles per hour |
| WhereA business district | Lawful speed unless posted25 miles per hour |
| WhereA residence district | Lawful speed unless posted30 miles per hour |
| WhereOpen mountain highways | Lawful speed unless posted40 miles per hour |
| WhereOther open highways off the interstate | Lawful speed unless posted55 miles per hour |
| WhereFour lane interstates, freeways and expressways | Lawful speed unless posted65 miles per hour |
A speed posted on an official traffic control device is lawful up to its limit.
Sources for this section (1)
- C.R.S. 42-4-1101 — Speed limits - penalties
Legal information, not legal advice. Verified as of October 2026. Applying it to a particular situation is the work of a licensed Colorado attorney.