Montana Rest Area & Parking Rules
Montana limits you to 12 hours in one parking space - this is MDT policy posted at the site and published at mdt.mt.gov, not a highway statute. Sleep in the cab overnight inside that window; camping is prohibited. No rule carves out federal HOS, so the 12-hour clock runs whether or not you are mid-reset. Rest areas on I-90 and I-15 fill by evening. Watch the sign at each site before you shut down. Reference, not legal advice.
A detail on this page is flagged medium confidence. Rest-area rules and posted limits change and can differ by site — confirm with the state DOT or the posted sign before you rely on it.
Sleeping overnight in Montana
Montana limits you to 12 hours in one parking space - this is MDT policy posted at the site and published at mdt.mt.gov, not a highway statute. Sleep in the cab overnight inside that window; camping is prohibited. No rule carves out federal HOS, so the 12-hour clock runs whether or not you are mid-reset. Rest areas on I-90 and I-15 fill by evening. Watch the sign at each site before you shut down. Reference, not legal advice.
Limits, truck parking, and HOS rest
- Time limit: 12 hours (MDT policy)
- Truck spots on I-90 and I-15 fill by evening; Montana runs no real-time TPIMS, so plan with MDT 511 (mdt.mt.gov/travinfo) and posted site listings. The Jason's Law survey flags rural long-haul corridors like Montana's as chronically short on nighttime truck parking.
- hosException: not addressed - the 12-hour clock runs even mid-reset. Camping banned but cab-sleeping is allowed. Important: the 12-hour limit rests on MDT policy (mdt.mt.gov) and posted signage, not a confirmed administrative rule - Montana ARM Title 12 (e.g. 12.8.813) is Fish, Wildlife & Parks, not the DOT (Title 18), so it does not govern MDT highway rest areas. Weigh stations are not overnight lots; welcome centers follow rest-area rules. Dual lens: MDT posts the 12-hour limit and Highway Patrol monitors sites, but enforcement usually targets campers and rigs taking multiple spaces, not a driver slightly over 12 hours.
What overstaying costs
Citation and/or tow for exceeding 12 hours or for camping; MDT publishes no set dollar amount.
Montana Rest Area FAQ
Can you park overnight at a rest area in Montana?
Is there a time limit at Montana rest areas?
What happens if you overstay at a Montana rest area?
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 Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it.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.mdt.mt.gov/travinfo/restarea.aspx. See our Terms & Disclaimer.
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