New Hampshire is a small state whose commercial trucking activity is dominated by through-freight on I-93 (running north–south from the Massachusetts border through Manchester and Concord to the Canadian border at Québec) and I-95 (a short 16-mile coastal corridor connecting Massachusetts to Maine). The New Hampshire Division of Motor Vehicles (DMV), within the Department of Safety, administers IRP apportioned registration and IFTA fuel tax accounts. The New Hampshire Department of Transportation (NHDOT) oversees highway standards and oversized/overweight permits. New Hampshire does not have a state sales tax, which influences fuel purchasing decisions for some carriers — drivers who can time their fuel stops in New Hampshire avoid state fuel taxes on taxable gallon purchases above their IFTA apportionment (though IFTA ultimately equalizes the tax burden across member jurisdictions). The New Hampshire Turnpike System (I-93, I-95, and the Everett Turnpike/F.E. Everett Turnpike) operates toll roads with E-ZPass commercial lanes. I-93 north of Concord and the US-302 and US-2 corridors into the White Mountains are critical for logging, ski resort supply, and tourism-related freight. Spring weight restrictions apply seasonally on non-turnpike state roads.
| GVWR | 80,000 lbs federal interstate standard |
| Single axle | 22,400 lbs on state routes with permit |
| Tandem axle | 34,000 lbs |
New Hampshire allows single-axle weights up to 22,400 lbs on state routes under applicable conditions — above the federal 20,000 lb standard. Spring weight restrictions (frost laws) apply seasonally on non-Interstate state routes, reducing allowable weights.
State trucking association: New Hampshire Motor Transport Association
New Hampshire does not impose a state sales tax on retail purchases, including some categories of purchases at truck stops. For IFTA purposes, fuel tax liability is ultimately equalized across member jurisdictions based on miles traveled and gallons consumed — so IFTA neutralizes most of the tax advantage. However, some carriers time fuel purchases in New Hampshire to optimize cash flow, deferring tax obligations to quarterly IFTA filings.
New Hampshire applies seasonal weight restrictions on non-turnpike, non-Interstate state routes during spring thaw, typically from February through April. Posted restrictions reduce allowable gross vehicle weights on affected roads. NHDOT publishes route-specific restriction postings; carriers should check before dispatching on state or county roads during the spring period.
Yes. New Hampshire allows single-axle weights up to 22,400 lbs on state routes — higher than the federal interstate standard of 20,000 lbs — under applicable conditions and permits. This applies to state highway routes, not federal Interstates.
The New Hampshire Turnpike System operates I-93, I-95, and the F.E. Everett Turnpike as toll roads. Commercial vehicles must use E-ZPass for toll payment at all-electronic toll points. Toll rates for commercial vehicles are assessed by axle count.
Verified 2026-05-26.