Secure Your New Hampshire Oversize Permits Today – Call Now!
New Hampshire (NM) DOT Phone no.# (270)908-9656
Oversize & Overweight Trucking Permits for Single Trip, Fuel, Overhang and Annual Permits
Oversize permits validity, Legal Dimensions, Routine Permits requirements, Escort/Pilot car information all your needs
New Hampshire (NM) oversize permits validity: These permits are valid for five-days. Before entering with a heavy haul, it is necessary to secure permits.
New Hampshire (NM) Legal Dimension
Length: 53 feet for trailer on designated routes & interstate and 48 feet for all roads.
Note: – The distance between the kingpin and the center of the rear tandem is 41 feet.
Length restrictions aren’t applicable to trucks transporting poles, pipelines, timber, lumber, or beams of steel. This exception does not apply to extendable trailers.
Width: 8 feet 6 inches.
Height: 13 feet 6 inches.
Weight: 80,000lbs Gross weight
Single Axle 20,000lbs on designated routes and 22,400 for other routes.
Tandem Axles 34,000lbs on designated routes and 22,400 for other routes.
Tridem Axles limits same like tandem.
22440lbs on single axle and 36,000 on a tandem axle is legal, if gross weight doesn’t exceed more than 73,280lbs.
New Hampshire (NM) Routine Permit Limit
Length: 110 feet.
Width: 16 feet.
Height: 16 feet.
Weight: Single Axle 25,000lbs, Tandem Axles 50,000lbs, Tridem Axles 70,000lbs, Quad Axles 85,000lbs.
If Single axle exceeds 27,500lbs
Tandem axles exceeds 25,000lbs
Tandem axles exceeds 25,000lbs
Tridem axles exceeds 22,5000lbs
Quad axles exceeds 20,000lbs
5 axles exceeds 100,000lbs
6 axles exceeds 120,000lbs
7 axles exceeds 130,000lbs
8 axles exceeds 149,999lbs bridge inspection is crucial.
Loads that surpass these dimensions are considered superloads.
New Hampshire (NM) Travel Time: You may travel half an hour before sunrise to after half an hour sunset Monday to Friday. On weekends and holidays not allowed to travel. Overweight load is not restricted for operating time.
In the season of Spring, Axle gross weight must be 20,000lbs or less.

New Hampshire (NM) Travel Restrictions: Travel through Manchester is prohibited from 7:00 AM to 9:00 AM and till 3:00 PM. Toll road regulations remain the same at 6:00 p.m. as on other routes. Travel is prohibited on major holidays, with certain limitations on holiday weekends.
New Hampshire (NM) Escort / Pilot Car Requirements and Information
Length: More than 80 feet required 1 escort/pilot car and more than 100 feet required police escort with 48 hours’ clearance till they free from it.
Overhang: More than 15 feet rear or front overhang required 1 escort/pilot car. When overhang exceeds 15 feet and width will be more than 12 feet on two lane unmerged routes, required two escorts/pilot car.
Width: For 12 feet required 1 escort/pilot car, 15 feet 1 inch required police escort and More than 18 feet required two polices escort with 48 hours’ clearance.
Height: More than 13 feet 6 inches required rote survey.
Signal, lights and flags requirements for oversize load In New Hampshire (NM):
Signs: When loads exceeds 10 feet in width, signs of “Oversize Load” required on front and rear of load or truck.
Flags: Red flags (12 inches square) are required when load get wide more than 4 inches from sides of trailer and when rear overhang extend more than 4 feet (if overhang is less than 2 feet wide then 1 flag attached at the overhang’s end and if overhang more than 2 feet wide then 2 flags may attach at the overhang’s end).
Amber light: Not Special requirements for light.
New Hampshire (NM) Single trip (IRP) OR Fuel (IFTA) and Annual Permits:
To obtain New Hampshire (NM) Single trip (IRP) OR Fuel (IFTA) and Annual Permits, the carrier must log into the state’s online permitting system, acknowledge the permit conditions, enter the vehicle and load information, select the travel dates, and provide the route details. Get your permits by calling us at (270)908-9656.
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New Hampshire (NM) Overweight Permit
This permit is necessary when a vehicle exceeds the allowable weight restrictions imposed by an authority. It guarantees that the truck may move securely on roadways while causing no harm to infrastructure.
New Hampshire (NM) Overlength Permit
The permit is required for vehicles that exceed the standard-length limit. It enables the transportation of longer goods, such as huge beams or pipes, while maintaining their safety and legality.
New Hampshire (NM) Fuel/Trip Permit
These permits are normally valid for one trip and is often necessary for trucks that do not have a regular IFTA (International fuel tax agreement) in place and IRP (International Registration Plan) registered. It enables the truck to drive through particular countries while remaining compliant with fuel tax requirements.
New Hampshire (NM) Overhang Permit
The permit is required when a load exceeds the rear or front of the vehicle. It guarantees that the overhanging weight is delivered securely, without endangering other road users.
New Hampshire (NM) Over-width Permits
A permit is necessary for vehicles that exceed the normal width limitations. It enables the transportation of larger loads, such as massive equipment or prefabricated constructions, while maintaining their safety and legality.
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FAQ'S Asked Questions about Oversize Permits
New Hampshire oversize permits information including legal dimensions, routine permit limits, and escort requirements, operating times and restricted travel.
To order an overweight permit in New Hampshire, complete the Certification for Additional Truck Weights form. This form must be completed by either the manufacturer or an authorized representative. You may get the form by calling the IRP office at (603) 227-4110. Once completed, send the form to the New Hampshire Department of Safety Division of Motor Vehicles, along with a copy of your current valid registration and any prior overweight certification.
In New Hampshire, the maximum width for a load without a permission is 8 feet, 6 inches.
The maximum height for a load in New Hampshire without a permit is 13 feet and 6 inches.
The maximum width for a load on the highway without a permit is 8 feet 6 inches.
The maximum gross vehicle weight (GVW) for trucks in New Hampshire is 80,000 pounds.
The maximum truck height in New Hampshire is 13 feet 6 inches.
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