New Hampshire OSOW Regulations (NHDOT)
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
- 5 travel days
Escort Vehicle Requirements
When Escorts Are Required
Over Width
- Over 12' wide: 1 escort
- Over 15'1" wide: 1 police escort
- Over 18' wide: 2 police escorts
Over Length
- Over 80' long: 1 escort
- Over 100' long: Police escort
Overhang
- Over 15' overhang: 1 escort
- Over 15' overhang on two-lane undivided highways AND width over 12': 2 escorts
Operating Times
Standard Hours
- 1/2 hour before sunrise to 1/2 hour after sunset
- Monday through Friday only
Weekend and Holiday Restrictions
- No weekend or holiday travel for overdimensional loads
Contact Information
- Website: https://www.nh.gov/dot/
- State: New Hampshire
- Agency: New Hampshire Department of Transportation (NHDOT)
Regulatory References
- New Hampshire Department of Transportation
- https://www.nh.gov/dot/
- https://jjkellercompliancenetwork.com/regsense/oversize-and-overweight-movements-new-hampshire
Last Updated: 2025-11-11
OSOW publishes New Hampshire regulation references as public guidance; field teams should still validate route-specific constraints before dispatch.
If your move requires managed execution, request dispatch support to align permits, escort assignment, and operational timing.
OSOW publishes New Hampshire regulation references as public guidance; field teams should still validate route-specific constraints before dispatch.