New Hampshire CMV Compliance Guide
NH DOT regulations for commercial motor vehicles
NH DMV Motor CarriersOfficial NH DOT websiteOverview
New Hampshire DMV and the New Hampshire State Police handle commercial vehicle regulation and enforcement. The state is a northern New England freight corridor with I-93 and I-95 as primary truck routes.
Inspection & Enforcement Program
New Hampshire operates weigh stations and mobile enforcement units. The state performs Level I through Level III inspections and participates in New England regional enforcement initiatives.
Weight Limits & Oversize/Overweight
New Hampshire follows federal weight limits of 80,000 lbs GVW on Interstate highways. The state has specific weight limits on secondary roads and bridges. New Hampshire allows certain exemptions for 6-axle combinations on non-Interstate routes.
New Hampshire-Specific Requirements
- New Hampshire has a state road toll (fuel tax) requirement for carriers. IFTA carriers report through IFTA; non-IFTA carriers must file separately.
- The state has seasonal weight restrictions during spring thaw on some town and state roads.
- New Hampshire's narrow roads in the White Mountains region have specific size and weight restrictions.
Contact
NH DMV Motor Carriers: (603) 227-4020
Federal Requirements That Apply in New Hampshire
In addition to New Hampshire-specific regulations, all federal DOT and FMCSA requirements apply to commercial vehicles operating in NH. These guides cover each federal requirement in detail:
This information is provided as a general reference. State regulations change frequently. Always verify current requirements with the New Hampshire DOT or your compliance advisor before relying on any information presented here.