Speed Limits and Speeding Fines
MCA 61-8-303 — 80 on the rural interstate, 70 by day on other highways, 25 in town, and a fine schedule by the miles over
| Road | Limit |
|---|---|
| RoadInterstate outside an urbanized area of 50,000 or more | Limit80 miles an hour |
| RoadInterstate within such an urbanized area | Limit65 miles an hour |
| RoadAny other public highway, daytime | Limit70 miles an hour |
| RoadAny other public highway, nighttime | Limit65 miles an hour |
| RoadAn urban district | Limit25 miles an hour |
Who handles this in Montana: State Bar of Montana, Licensed Lawyer Montana; and legal aid programs and the state offices, listed in the Montana directory.
On a two-lane road in a designated passing zone, a driver may go 10 miles an hour over the limit to pass and return safely to the right lane. Under the limit, a driver still keeps a speed that is reasonable and prudent for the traffic, visibility, weather and road.
- On the interstate, the fine is $40 for 1 to 10 over, $70 for 11 to 20, $120 for 21 to 30, and $200 for 31 or more.
- On other highways, it is $20 for 1 to 10 over, with the same amounts above that.
- Up to 10 over by day, or 5 over at night, is not a criminal offense and is not recorded against the driving record.
Speeding in a school zone is a misdemeanor punished by at least double the usual penalty.
Sources for this section (3)
- MCA 61-8-303 — Speed restrictions -- definitions
- MCA 61-8-725 — Penalty for violation of speed limits -- no record for certain violations
- MCA 61-8-726 — Violating speed limit in school zone -- penalty doubled -- disposition of fines
Legal information, not legal advice. Verified as of October 2026. Applying it to a particular situation is the work of a licensed Montana attorney.