New Hampshire Weigh Stations & Ag Inspection
New Hampshire keeps fixed scales on I-93 at Windham and I-95 near Portsmouth, worked by State Police Troop G, and an officer can send any truck to the nearest scale within 10 miles (RSA 266:17). When the station is open and the sign directs you, pull in. Drivewyze is the only bypass in the state, so no green signal means you stop. Skip an open scale and expect roughly $100 to $250, a turnaround, and CDL exposure on repeats.
A detail here is flagged medium confidence — confirm with the state agency before you rely on it.
When New Hampshire makes you pull in
New Hampshire keeps fixed scales on I-93 at Windham and I-95 near Portsmouth, worked by State Police Troop G, and an officer can send any truck to the nearest scale within 10 miles (RSA 266:17). When the station is open and the sign directs you, pull in. Drivewyze is the only bypass in the state, so no green signal means you stop. Skip an open scale and expect roughly $100 to $250, a turnaround, and CDL exposure on repeats.
Stations, bypass, and inspection
- Who must stop: Only when a sign directs
- Where the stations are: Permanent scales on I-93 at Windham and I-95 near Portsmouth/Hampton, run by State Police Troop G, plus portable scales. An officer can order any vehicle to the nearest scale within 10 miles.
- Bypass: Drivewyze PreClear only. Drivewyze is the sole bypass service in New Hampshire; PrePass is not offered. No green signal means you follow the sign and stop.
- Ag / border inspection: No agricultural inspection stations. The Canadian border is federal CBP.
- Fine for passing an open station: Failing to stop or comply is a violation, generally about $100 to $250, and a trooper can bring you back. Repeat or serious cases can hit your CDL (RSA 266:17).
New Hampshire Weigh Station FAQ
Do trucks have to stop at weigh stations in New Hampshire?
Can I bypass weigh stations in New Hampshire?
What is the fine for passing an open weigh station in New Hampshire?
Reference information for planning, not legal advice. Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it. Last reviewed July 2026. Source: https://gc.nh.gov/rsa/html/XXI/266/266-17.htm. See our Terms & Disclaimer.
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