State guides / Montana
Montana oversize escort requirements
When a load over legal width, height, length or weight needs pilot cars or a police escort in Montana, on two-lane and divided highways.
From the state's published tables; some cases are set per permit
| Load | Two-lane highway | Divided highway | Rule |
|---|---|---|---|
| Width12'6" wide | None | None | No escort trigger at this size |
| Width14'6" wide | 1 front | None | width 12'6"–16'6" (non-interstate) — 1 front — no codified Montana Highway Patrol escort trigger found |
| Width16'6" wide | 1 front | None | width 12'6"–16'6" (non-interstate) — 1 front — no codified Montana Highway Patrol escort trigger found |
| Width18'6" wide | 1 front + 1 rear | 2 rear | width >16'6" (non-interstate) — 1 front + 1 rear — no codified Montana Highway Patrol escort trigger found; width >18' (interstate) — 2 rear — no codified Montana Highway Patrol escort trigger found |
| Height15'6" high | None | None | No escort trigger at this size |
| Height16'6" high | None | None | No escort trigger at this size |
| Length110' overall | None | None | No escort trigger at this size |
| Length130' overall | 1 rear | 1 rear | length >110' (non-interstate) — 1 rear — no codified Montana Highway Patrol escort trigger found; length >120' (interstate) — 1 rear — no codified Montana Highway Patrol escort trigger found |
| Weight200,000 lb gross | None | None | No escort trigger at this size |
Whenever an escort is required
- superloads (>18' wide, >17' tall, >150' long, or excess tridem axle weight) instead require advance notification to local law enforcement/fire/EMS.
Each example changes one dimension from a legal 8′6″ wide, 13′6″ high, 75′, 80,000 lb tractor-trailer. Real moves often combine several. “Set by permit” means Montana decides that case on the permit itself. Permits can add conditions of their own, so check yours before you move.
Price the whole Montana move in one quote.
Permits, escorts, police, curfews and fuel for every state on the route, with the source behind every line.
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