New Hampshire oversize load rules
Legal limits, pilot car requirements, travel restrictions, superload thresholds and permit fees for oversize and overweight loads in New Hampshire.
Legal limits without a permit
| Width | 8′6″ (102 in) |
|---|---|
| Height | 13′6″ |
| Length | 53′ semitrailer · 45′ single unit |
| Weight | 80,000 lb gross |
At a glance
| Escorts | 6 escort rules, starting at 12′ wide |
|---|---|
| Superload | 4 review triggers (height, length, weight, width) |
| Travel | 4 restrictions (curfews, night, holidays) |
| Fees | 3 published fee lines |
Escort (pilot car) requirements
- 6 width, height and length thresholds with the escort count for each
- Police escort triggers
- Overhang and route-type conditions
Travel restrictions
- 4 restrictions: curfews, night travel, weekends and holidays
- Which ones apply to a given load size
Superloads
- Exact thresholds and what the state requires past them
- Lead times, route surveys and police escort conditions
Permit fees
- 3 published fee lines with links to the fee schedule
- Validity periods and add-on charges
Common questions
When does a load need an escort in New Hampshire?
At 12′ wide, over 14′ high, 90′ long, or with a 15′ overhang. From 100′ long a State Police escort joins; over 14′ wide takes two State Police escorts.
Can oversize loads travel on weekends in New Hampshire?
Not normally. Oversize permits are not valid on weekends unless the move is a supermove or a wide building, and New Hampshire closes eleven holidays.
What is a supermove in New Hampshire?
Over 15′ wide, over 110′ long, or over 149,999 lb (the rule also lists load height over 13′6″). It needs an engineering report from a New Hampshire-licensed engineer.
Sources
- N.H. Admin. Code Tra 304.17, escort vehicles
- N.H. Admin. Code Tra 300 (permits, supermoves, travel days)
- RSA 266 (size and weight limits)
- RSA 266:22, permit fees
Planning reference. Permits carry their own conditions, and city and county roads have separate rules. Confirm with the NHDOT Bureau of Turnpikes / Permit Office before moving a load. Found an error? Report it.
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