New Hampshire permits
New Hampshire Oversize Permit Rules
Legal limits, escorts, State Police escorts, travel hours, holidays, route surveys and supermoves for oversize and overweight loads in New Hampshire, each checked against the NHDOT pages and the New Hampshire rules.
Last checked: Oct 19, 2026
This page is general information only, not legal advice and not a permit. Rules change often and each state's permit and official rules are the final word. Always confirm limits, escorts, routes and travel times with the state permit office before moving a load. Reliable Transport LLC is not responsible for decisions made using this information.
- Escorts start
- 12'W or more
- State Police
- 100'L or more
- Travel
- Weekday daylight
Hauling through other states? Use our permit map and route planner
Open the route plannerNHDOT permits
How New Hampshire sizes up a heavy load
The New Hampshire Department of Transportation (NHDOT) issues oversize and overweight permits from its permit office in Concord and through its NHDOT Permits online system, under RSA 266 and the New Hampshire permit rules in Tra 304. These are the numbers we plan every New Hampshire load with. Run your exact load and route through our permit tool to see every state on the trip.
Check your load
Enter your width, height, length and weight in our permit tool to see the rules for every state on your route, each with its official source.
New Hampshire limits
New Hampshire legal limits and permit thresholds
Over any legal limit, the load needs an NHDOT permit before it moves.
New Hampshire legal size, weight and permits
Official sources linked| Rule | Limit |
|---|---|
| Legal width | 8'6"W (102 inches) (RSA 266:12) |
| Legal height | 13'6"H (RSA 266:10) |
| Legal gross weight | 80,000 lbs on a tractor semitrailer with 5 or more axles; heavier loads need a permit (RSA 266:18) |
| Route survey | Over 13'6"H or over 110'L (Tra 304.07, NHDOT Permits) |
| Supermove | Over 110'L, or over 149,999 lbs; NHDOT Bridge Design reviews permits from 150,000 lbs up to 300,000 lbs (Tra 304.12, NHDOT engineering review criteria) |
Escorts
New Hampshire escort requirements
New Hampshire sets escorts by width, overhang and length, and long loads add a New Hampshire State Police escort.
New Hampshire escorts by load size
Official sources linked| Load | Escorts |
|---|---|
| 12'W up to 14'W | One escort (Tra 304.17) |
| Front or rear overhang of 15' or more | One escort (Tra 304.17) |
| Rear overhang of 15' or more and 12'W or more | Two escorts (Tra 304.17) |
| 100'L or more | One New Hampshire State Police escort, on top of any other escorts (Tra 304.17) |
Escort rules come from Tra 304.17. The State Police ask for 48 hours notice before an escort. The permit lists the escorts for each move, including any State Police escort, and overrides the general table. (Tra 304.17, NHDOT Permits)
Height and routes
Route surveys, tall loads and utilities
What New Hampshire asks of the tallest loads.
Legal height
13'6"H is the legal height. Taller loads need a permit. (RSA 266:10)
Route survey
Over 13'6"H, and over 110'L, the permit needs a physical route survey of the clearances on the route. (Tra 304.07, NHDOT Permits)
Travel times
Travel hours, nights, weekends and holidays
When a permitted load may move in New Hampshire.
Hours
Oversize loads move in daylight, from half an hour before sunrise to half an hour after sunset. (Tra 304.14, NHDOT Permits)
Weekends
Oversize permits are not valid on weekends. Loads that are only overweight and run at normal traffic speed are not held to set days or hours. (Tra 304.14)
Holidays
No permit moves on the state holidays. (Tra 304.14, NHDOT Permits)
Superloads
New Hampshire superloads
New Hampshire classes a move over 110'L, or over 149,999 lbs, as a supermove. From 150,000 lbs up to 300,000 lbs, NHDOT Bridge Design reviews the permit. (Tra 304.12, NHDOT engineering review criteria)
See how we plan the biggest loads on our Superload Transport page.
Our moves
Heavy loads we have moved
207,000 lb dryer drum
A 207,000 lb dryer drum from Louisville, KY to Richmond, VA.
Read the move →110,000 lb switchgear building
A switchgear building of 110,000 lbs, from Houston, TX to Los Angeles, CA.
Read the move →150,000 lb transformer
A 150,000 lb transformer from Pocatello, ID to Akron, OH.
Read the move →Moving a load in New Hampshire?
Send the dimensions and weight. We file the New Hampshire permit and book the escorts.
Request a quote →See every move on our Moves page.
Sources
Official New Hampshire sources
Every rule on this page is taken from the official rule text below and confirmed by a second source. Rules we could not confirm twice are left off this page. Rules change, and the permit itself always decides. Last checked: Oct 19, 2026.
Questions
New Hampshire permit questions
What are the legal size and weight limits in New Hampshire?
8'6"W and 13'6"H, and 80,000 lbs gross on a tractor semitrailer with 5 or more axles.
When does New Hampshire require escorts?
From 12'W up to 14'W, one escort, and with 15' or more of overhang, one escort. With both 12'W or more and 15' or more of rear overhang, two escorts.
When is a New Hampshire State Police escort needed?
At 100'L or more, on top of any other escorts. The State Police ask for 48 hours notice.
When can oversize loads move in New Hampshire?
On weekdays, from half an hour before sunrise to half an hour after sunset, and not on the state holidays. Loads that are only overweight and keep normal traffic speed are not held to set days or hours.
When is a New Hampshire load a supermove?
Over 110'L, or over 149,999 lbs. From 150,000 lbs up to 300,000 lbs, NHDOT Bridge Design reviews the permit.
Keep planning
More for your New Hampshire move
Permit rules in other states
Hauling through other states? Use our permit map and route planner
Open the route plannerReliable Transport LLC | Reliable Heavy Haul
Ready to move it?
We haul oversize and overweight loads across the USA and Canada from our home base at 7660 W Third St, Dayton, OH 45417. Send your load details and we will plan the New Hampshire permit, route and escorts.
This page is general information only, not legal advice and not a permit. Rules change often and each state's permit and official rules are the final word. Always confirm limits, escorts, routes and travel times with the state permit office before moving a load. Reliable Transport LLC is not responsible for decisions made using this information.