Legal size & loaded measurements
General width
8′6″Ordinary vehicle-and-load limit; safety-device, vehicle and load exceptions may apply.
Loaded height
13′6″Ordinary freight. Manufactured housing and modular buildings have a separate scoped 14′6″ provision.
Loaded dimensions
New Hampshire baselines are 8 feet 6 inches width and 13 feet 6 inches height; length and weight are configuration-, road-system- and bridge-specific.
Axles, weight & bridges
Use axle count, axle groups, spacing, tire ratings, road system, registration and bridge formula; GVW alone is not a New Hampshire weight decision.
Loaded width
New Hampshire's statutory width baseline is 102 inches including load, subject to the enumerated passenger-vehicle exception.
Loaded height
New Hampshire's general height baseline is 13 feet 6 inches; manufactured housing and modular buildings may reach 14 feet 6 inches only under their scoped rule and escort conditions.
Permits, routes & larger loads
Roads & authorities
Tra 304 permits authorize only state-maintained highways and bridges under NHDOT jurisdiction; obtain separate permission from town, city, turnpike and other route owners.
When a permit is needed
Excess size or weight requires the applicable New Hampshire annual, supplemental, emergency or single-trip permit unless a documented exception applies; ordinary single-trip permits are five business days.
Permits, routes & larger loads
A supermove begins over 15 feet width, 110 feet length, 13 feet 6 inches height or 149,999 pounds and requires engineering/route review; annual permits are not available for supermoves.
State permit fees
Single-trip agency fee example
$6 for this New Hampshire planning example: a nondivisible load measuring 8′7″ wide, 13′ high and 70′ overall, at 72,000 lb gross on a five-axle rig with a 48′ trailer. The example uses 100 in-state miles. Change the load details in the calculator for your move.
What the agency estimate includes
The calculator applies New Hampshire's maintained single-trip permit schedule to the loaded vehicle and the supplied fee inputs. It itemizes the supported state charges, including weight or distance charges where applicable. Annual permits, special products, local permissions and payment-method charges need their own applicable schedule.
NH / Permit worksheet
Price your New Hampshire movement.
Enter the complete loaded vehicle. Get estimated agency fees and escort requirements before sharing your contact details.
The numbers behind your next move.
Your result will show the agency fee breakdown, potential pilot-car requirements, and the rules used to calculate them.
- 01 State agency fee subtotal
- 02 Escort & survey considerations
- 03 Sources & pricing assumptions
Single-state pricing uses the mileage you enter. For a proposed route and intermediate states, use the route calculator.
About the example equipment
The samples use ODPermit’s editable 48 ft flatbed · 5 axles planning profile. Loaded dimensions, gross weight, 100 state miles and Texas registration are example inputs, not a capacity rating or a route approval. Replace them with your actual setup.
Great Dane Freedom trailer specifications — 48 ft platform; the illustrated 40 in drop deck and 20 in drop support a 60 in upper-deck planning height. Combined tare and tractor geometry are editable ODPermit assumptions.
Pilot cars, height poles & surveys
14′6″-wide load example
Example: 14′6″ wide × 13′ high, 75′ overall, 72,000 lb gross, zero overhang or rear projection, ordinary nondivisible freight in daylight. Depending on the road or permit conditions: At 14 ft wide or above, obtain the private-escort assignment on the permit. Length, height and overhang minimums shown here still apply; do not treat them as the entire width crew. Two state police escorts accompany the private team. This total includes the police vehicle otherwise triggered by length. Depending on the road or permit conditions: If any part of a highway must close, the police team increases to three vehicles total. The permit office can assign additional traffic-control resources for the route.
17′6″-high load example
Example: 9′ wide × 17′6″ high, 75′ overall, 72,000 lb gross, zero overhang or rear projection, ordinary nondivisible freight in daylight. A physical clearance survey is required above 13 ft 6 in high or above 110 ft long under Tra 304.07(g). Depending on the road or permit conditions: If any part of a highway must close, the police team increases to three vehicles total. The permit office can assign additional traffic-control resources for the route. Two-lane roads: 1 front pilot car. Multi-lane undivided roads: 1 front pilot car. Divided highways: 1 rear pilot car.
Travel hours & road restrictions
Travel hours
Oversize movement is ordinarily limited to one-half hour before sunrise through one-half hour after sunset, with weekends and listed holidays restricted; overweight-only normal-speed moves are a scoped exception.
Current route restrictions
Check NHDOT travel-status notices, seasonal/posted bridge and highway restrictions, construction, route-owner permissions and inclement weather before departure.
Signs, flags & safety equipment
Safety equipment
Use 18-inch flags, front/rear OVERSIZE LOAD signs, top-mounted amber lighting, no-convoy rules, escort radios/lights and all permit/weather controls; the unavailable current DMV CDL manual is not used to invent extra guidance.
What the driver needs
Carry the permit
Carry the issued permit in the vehicle; electronic carriage is allowed, but the designated route, dates and conditions remain binding.
Prepare the driver packet
The packet must match the issued vehicle/load, route, dates, dimensions, permit product, escort instructions and any engineering, bridge, survey, bond or road-owner documents.
Special equipment & permit programs
Special permit programs
Manufactured housing, modular buildings, emergency relief, self-propelled equipment, agricultural exceptions, annual permits and NETC regional permits have scoped conditions and must not be treated as blanket exemptions.
BEFORE THE TRUCK ROLLS
Turn the estimate
into a permitted move.
Confirm the loaded measurements, carrier details, travel dates and exact pickup and delivery. We can help coordinate permits, escorts and route surveys around those facts.
THE SOURCE RECORD
Official references.
Read the rule behind each requirement. These are dated references; current restrictions and the issued permit control your move.
- 01
- 02
- 03
- 04RSA 266:18 — Weight on Interstate and Defense Highway System
RSA 266:18(I)-(II)(g)-(h)
Source record: - 05RSA 266:18-a — Weight on Non-Interstate and General Highway System
RSA 266:18-a(I)-(II)
Source record: - 06New Hampshire Administrative Rules Tra 304 — Oversize and Overweight Vehicle Permits
Tra 304.01-.07
Source record: - 07
- 08New Hampshire Administrative Rules Tra 304 — Oversize and Overweight Vehicle Permits
Tra 304.05, .09-.13
Source record: - 09New Hampshire Administrative Rules Tra 304 — Oversize and Overweight Vehicle Permits
Tra 304.12(b)-(f)
Source record: - 10New Hampshire RSA 266:22 — registered-weight permit fee bands
New Hampshire RSA 266:22 — registered-weight permit fee bands
Source record: - 11NHDOT permit ordering tutorial — combined OSOW fee example
NHDOT permit ordering tutorial — combined OSOW fee example
Source record: - 12
- 13
- 14New Hampshire Administrative Rules Tra 304 — Oversize and Overweight Vehicle Permits
Tra 304.14(f)-(m), .16
Source record: - 15New Hampshire Oversize/Overweight Permit System
New Hampshire Oversize/Overweight Permit System
Source record: - 16New Hampshire Administrative Rules Tra 304 — Oversize and Overweight Vehicle Permits
Tra 304.15
Source record: - 17New Hampshire Administrative Rules Tra 304 — Oversize and Overweight Vehicle Permits
Tra 304.17(b)-(k)
Source record: - 18New Hampshire Administrative Rules Tra 304 — Oversize and Overweight Vehicle Permits
Tra 304.14(e), .16(b)-(d)
Source record: - 19