STATE PERMIT GUIDE

Montana: plan the permit work.

Check the published facts below. Fields still awaiting verification are clearly marked.

Plan a move through Montana Official permit information ↗

Dimensions & weight

General loaded width: 102 in
Reviewed against the cited official source; exceptions and permit conditions apply.
Verified 2026-09-19 · Official source · p7
General loaded height: 168 in
Reviewed against the cited official source; exceptions and permit conditions apply.
Verified 2026-09-19 · Official source · p7
Configuration-specific length: Truck-and-trailer: 75 ft. Tractor with a trailer of 53 ft or less has a separate overall-length exception.
Reviewed against the cited official source; exceptions and permit conditions apply.
Verified 2026-09-19 · Official source · p7
Gross combination weight: Montana does not use 80,000 lb as an automatic special-permit trigger.
Check licensed weight, axle configuration and applicable bridge limits with MCS.
Verified 2026-09-19 · Official source · p18: special permit over 80,000 lb
Axle / bridge / tire limits: Confirmation required
Load overhang: Confirmation required

Permits & costs

Single-trip permit: Confirmation required
Annual permit: Confirmation required
Validity: Confirmation required
Published lead time: Confirmation required
Special / superload review: Review above 18 ft wide, 17 ft high or 150 ft long; bridge review can also trigger special handling.
Reviewed against the cited official source; exceptions and permit conditions apply.
Verified 2026-09-19 · Official source · p14
State permit fee: $10 oversize base; additional weight charges may apply. Verified 2026-09-19 · Official source · pp7–8

Escorts & markings

Pilot cars / escorts: Interstate: above 16 ft 6 in through 18 ft wide, rear pilot. Other roads: above 12 ft 6 in through 16 ft 6 in, front pilot; above that through 18 ft, front and rear.
Reviewed against the cited official source; exceptions and permit conditions apply.
Verified 2026-09-19 · Official source · p14
Police escort: Confirmation required
Height pole: Confirmation required
Signs / flags / lights: Confirmation required

When and where to move

Travel hours: Confirmation required
Weekend movement: Confirmation required
Holiday movement: Confirmation required
Seasonal restrictions: Confirmation required
Weather restrictions: Confirmation required
Local / toll jurisdictions: Confirmation required

Plan the details

Oversize & overweight permits: what shippers need to know →How to plan a multi-state oversize load →What makes a load oversize or overweight? →Pilot cars and escorts: when are they required? →How oversize permit costs are calculated →How to measure an oversize load before requesting permits →Oversize load travel hours, weekends and holidays →Route surveys, bridge clearances and permitted routes →State permits vs city and local permits →What can make an oversize permit invalid? →

Requirements and fees can change. Final permits, routes and movement requirements are determined by the applicable issuing authorities. State permits may not cover local or toll roads.