Road conditions
Every closure and crash MDT 511 is publishing, on one map with the route and mile marker. Below it: the live cameras, the I-90, I-15 and I-94 corridor pages, and what the season does to Montana's highways. For the whole country, see the US closures map.
Montana's DOT traveler site. The list of record for closures, restrictions and detours.
CamerasEvery MDT 511 camera on one map, with the route and mile marker where the DOT gives one.
CorridorThe whole I-90 corridor, every state it crosses, alerts by mile marker.
CorridorThe whole I-15 corridor, every state it crosses, alerts by mile marker.
CorridorThe whole I-94 corridor, every state it crosses, alerts by mile marker.
Mile markersHow Montana numbers its highways and where the markers matter most.
ReportWhat the MDT 511 feed carried over the holiday weekend.
I-90 crosses the whole state, Lookout Pass, Missoula, Butte, Bozeman, Billings, about 552 miles. I-15 runs south to north from Monida Pass through Butte, Helena and Great Falls to the Canadian border. I-94 splits off at Billings and heads for North Dakota through Miles City and Glendive. US-2 is the Hi-Line, the long northern route past Glacier, US-93 runs the Bitterroot and Flathead valleys, and MT-200 crosses nearly the entire state.
Homestake Pass east of Butte, around milepost 233, is the highest point on I-90 at 6,329 feet and icy for a good share of the year. Lookout Pass at the Idaho line and Bozeman Pass see the same winter. The Beartooth Highway on US-212 closes every fall and reopens in late spring. Ground blizzards on the Hi-Line erase the road, chain requirements arrive fast, and MDT posts every condition by milepost. Its weather stations carry cameras, up to four views at a site.
Over 25 daily snapshots from September 1 to 25, 2026, MileCheck's archive of the MDT 511 feed held 46 unique reports, including 24 crash reports and 15 weather reports. The routes with the most reports were I-90, US-12 and MT-200. Counts reflect what the feed publishes, so a state whose DOT posts only closures shows only closures. Read the September Highway Report.
The map above shows every full closure MDT 511 is publishing as a red marker, crashes in orange, and weather and hazard alerts in blue and purple. Closures the DOT has posted for a future date are listed as scheduled, and ramp and lane closures sit under the toggle so the list stays readable. It reloads every five minutes. If the feed cannot be reached the page says so instead of showing an empty map. For the official list, open MDT 511.
MDT 511 is the official source, and dialing 511 in most states reaches the same information by phone. This page reads the same MDT 511 feed and adds the Montana cameras, the corridor and pass pages, and your own mile marker if you carry the app.
Chain and traction rules are set by MDT 511 per road and per direction, and they change with the storm. Restrictions the DOT publishes as alerts appear on the map above and on the corridor pages. Always follow the posted signs. What "chains required" means explains the levels.
Every five minutes. MileCheck's server fetches the MDT 511 feed, converts it to one format shared by all 50 states, and caches it for five minutes. Each alert also carries the time the DOT last updated it, shown in the list.
Yes. The app shows the same MDT 511 alerts on your route, ahead of your position, with the mile marker you are passing. The mile marker works offline in all 50 states. Live alerts are part of MileCheck Premium, $49.99 a year or $9.99 a month after a 7-day free trial.
Your mile marker shows even offline. MDT 511 alerts on your route and the nearest camera are part of MileCheck Premium and need a connection to update. Runs on CarPlay and Android Auto.
The Monthly Highway Report
The month's numbers from DOT feeds in all 50 states and BC. See a sample: the Labor Day weekend report. No spam.
MileCheck