Maine OSOW Regulations (MaineDOT)
Legal Dimensions (No Permit Required)
- Width: 8'6"
- Height: 13'6"
- Length: 53' (semitrailers)
- Gross vehicle weight: 80,000 lbs
Legal Weights (No Permit Required)
- Single axle: 20,000 lbs
- Tandem axle: 34,000 lbs
Permit Validity
- 7 days
Escort Vehicle Requirements
When Escorts Are Required
Over Width
- Over 12' wide: 1 escort pilot car
- Over 16' wide: 1 escort pilot car AND 1 police escort
- Over 20' wide: 2 police escorts
Over Length
- Over 80' long: 1 escort pilot car
- Over 125' long: 1 escort pilot car AND 1 police escort
- Over 150' long: 2 police escorts
Over Height
- Over 16' high: 1 escort pilot car with height pole
Operating Times
Standard Hours
- 1/2 hour before sunrise to 1/2 hour after sunset
- 7 days a week
Summer Weekend Restrictions
- No travel on weekends in July and August
Contact Information
- Website: https://www.maine.gov/sos/bmv/vehicles/commercial-vehicles-motor-carrier-services/overlimit-permits
- State: Maine
- Agency: Maine Department of Transportation (MaineDOT)
- Bureau: Bureau of Motor Vehicles
Regulatory References
- Maine Department of Transportation
- Maine Bureau of Motor Vehicles
- https://www.maine.gov/sos/bmv/vehicles/commercial-vehicles-motor-carrier-services/overlimit-permits
- https://jjkellercompliancenetwork.com/regsense/oversize-and-overweight-movements-maine
Last Updated: 2025-11-11
OSOW publishes Maine regulation references as public guidance; field teams should still validate route-specific constraints before dispatch.