Dimensions: Width: 8' 6" Height: 13' 6" Semi Trailer Length: 53' (non-designated Hwys: 48) Maximum Length: 110' Legal Overhang: Front/Rear: 10'
Weights: Single Axle: 20,000 lb. Tandem axle: 34,000 lb. Tridem: 34,000 Max Gross Weight: 80,000 lb.
New Hampshire Permit Department Contact Information
8:00 AM - 4:00 PM Eastern
Escort Vehicle Requirements
The number of escort vehicle(s) required for manufactured housing, modular buildings, and building components shall be as provided in Tra 304.13(g).An escort vehicle is required for an oversize vehicle, object or vehicle and load, if:
Two escort vehicles are required if:
1. If the width is 12 feet 0 inches wide AND
2. If the rear overhang of 15 feet 0 inches
A state police escort, plus any required non-police escorts are required if:
The vehicle and load are 100 feet 0 inches or more in length.
Note: State police escort may not be required if it is determined that weather conditions, visibility, traffic flow, or other conditions do not compromise safe movement.
Two State Police escorts may be required, in addition those required above if If the overall width exceeds 14 feet 0 inches
If the movement requires highway closure or closure of a portion of a
highway, 3 state police escorts shall be required, provided that any
state police escorts already required under (e)-(f) above shall be
included in counting the 3 state police escorts required .
office will determine the number of non-police and state police escort
vehicles required. The permit office may also determine the number and type of additional non-police escorts that may be needed to safely effect the required traffic control of any
Maximum Legal Weight Limits
Axle Group Maximum
Single 22,400 lb.
Tandem 18,000 lb.
Tridem 54,000 lb.
Maximum GVW 80,000 lb.
Two Axle Truck – 33,400 lbs.
Three Axle Truck – 55,000 lbs., 22,400 lbs./axle max
Four Axle Truck – 60,000 lbs., 18,000 lbs./axleMaximum Permit Weight Allowed
Maximum Certified Vehicle Weight Limits on Approved Structures:Single Unit Vehicles:
Two Axle Truck – 37,400 lbs.
Three Axle Truck – 65,000 lbs., 22,400 lbs./axle max
Four Axle Truck – 73,000 lbs., 20,000 lbs./axle
3 Axle Tractor Semi-Trailer – 54,500 – 60,000 lbs. (D=25 ft. – 32 ft.)
4 Axle Semi-Trailer – 59,000 – 69,000 (D = 8 ft. – 18 ft.)
5 or 6 Axle Semi-Trailer – 70,000 – 84,000 lbs. (D=19 ft. – 29 ft.)
86,000 – 99,000 lbs. (D = 30 ft. – 36 ft.)
6,7 or 8 Axle Semi-Trailer – 86,000 – 99,000 lbs. (D=30 ft. – 36 ft.)
OS/OW Permit shall be submitted to Bridge Design for bridge review if:Any bridge on the proposed route has a load posting or weight restriction
Trip Permit - 72 hours, $15.00
Fuel Permit - 72 hours, $10.00
The penalty for an overloaded vehicle is a fine for not more than $100 for a first offense nor more than $250 for a subsequent offense within the registration year.
Any person who shall drive or cause to be driven on a bridge of this state a vehicle whose weight exceeds the limit of an excluded bridge (or bridge posted for no trucks) may be fined up to four hundred dollars ($400).
Fines for excessive weight are:
Over legal weigh $100 or $.02 for each pound in excess
2nd offense over the legal weight $250 or $.02 for each pound in excess
3rd Offense $250 or $.02 for each pound in excess
Over 15,000 lb. but less than 30,000 lb. $.03 per pound overweight
Over 30,000 lb. but less than 30,000 lb. $.03 per pound overweight
Non-police escort vehicles shall be equipped with the following equipment installed:
1. An operating, top-mounted, flashing or strobe amber light visible for 1000 feet in all directions;
2. A 2-way radio that can communicate with all vehicles, including police.
3. Two warning signs shall be displayed during the move on the front and back of the vehicle or one sign above the roofline where it is visible from the front and rear meeting the following standards:
It shall be unlawful to drive a motor vehicle or trailer upon the ways unless such motor vehicle or trailer is equipped with tires in safe operating condition.
No tire mounted on a motor vehicle or trailer shall be deemed to be in safe operating condition unless it meets the visual and tread depth requirements set forth in this subdivision.
Minimum legal tread depth requirement is 2/32 inches.
Readings shall be taken in a major tread groove of the tire nearest the center at 2 points of the circumference not closer than 15 inches. Readings for a tire which has the tread design running across the tire or for a sipped tire, where such tread design is permitted, shall be taken at or near the center of the tire at 2 points of the circumference not closer than 15 inches.
Heavy vehicle ban may be necessary to protect pavements during thaw.
Warmer weather means sections of roads will be vulnerable to pavement breaking up as the frost leaves the underlying road base.
Road postings are determined annually by local NHDOT District Engineers, who carefully review each roadway in their areas before posting a road limit to ensure protection of the roads. For up-to-date road conditions and restrictions, go to: http://newengland511.org/ and select "trucking" at the top of the page and "New Hampshire" at the top of the map.
The maximum allowable vehicular weight on posted sections of State highways is one half of the regularly allowed legal load .
Affected roads can be found on the Web at https://www.nh.gov/dot/media/nr2011/nr03222-roadpostings.htm
Annual permits for vehicles no greater than 75-0 in length, 10-6 in width, 13-6 in height, and NH Legal Registered Weight GVW are$ 115.00 for statewide travel.
$60.00 for travel within a 100-mile radius for New Hampshire based and registered carriers only
Time: 1 business day
In any work zone along any road, normal speed limits may be reduced, traffic lanes may be changed, and people and vehicles may be working on or near the road.
Diamond-shaped orange warning signs are posted in advance of road construction projects. Slow down! Be alert! Pay attention to the signs!
A "flagger ahead" warning sign may be posted in the work zone. Be prepared to slow down, stop, change lanes, etc. Be prepared to obey the flagger's directions.
When indicated, merge
as soon as possible. Don't zoom right up to the lane closure, then try
to barge in.
Slow down when the signs say to. A car traveling 60 m.p.h. travels 88 feet per second. If you're going 60 m.p.h., and you pass a sign that states, “Road Work 1,500 feet,” you'll be in that work zone in 17 seconds.
The most common crash in a highway work zone is the rear-end collision, so remember to leave two seconds of braking distance between you and the car in front of you.
Keep a safe distance between your vehicle and traffic
barriers, trucks, construction equipment and workers.
Special Provisions for Single-Trip Permits for Manufactured Housing, Modular Buildings, and Building Components
The movement of manufactured housing, a modular building, or building components requires a single-trip permit.
The movement of manufactured or modular buildings that exceed 16 feet 0 inches in width is not permitted.
There is a 6-inch allowance for overhanging eave(s) on the right-hand shoulder side of the highway in the direction of travel. Any eave overhang on the left side shall be considered part of the maximum width dimension.
A single trip permit for movement of a vehicle hauling manufactured housing, modular buildings, or building components shall be subject to the following conditions:
(1) The manufacturer's specifications regarding maximum capacities for the equipment employed in transporting manufactured housing units shall not be exceeded
(2) The towing vehicle
for manufactured housing units which exceed 10 feet 0 inches in width
shall be a truck-tractor of not less than 2-ton capacity, equipped with
dual wheels on each side of the drive axle
(3) The transport vehicles, including trailers, must all necessary operating safety equipment
(e) A single trip permit issued for movement of a vehicle hauling manufactured housing, modular building, or building components, with overall measurements of up to 110 feet 0 inches in length, equal to or less than 14 feet 6 inches in height, and equal to or less than 14 feet 0 inches in width, shall be allowed to move from Monday through Friday, unless otherwise suspended by a holiday, weather condition, or other control regulation or noted on the face of the permit.
(f) A single trip permit issued under Tra 304.12 for movement of a vehicle hauling manufactured housing, modular building, or building components, with overall measurements of up to 110 feet 0 inches in length, equal to or less than 14 feet 6 inches in height, and greater than 14 feet 0 inches but equal to or less than 16 feet 0 inches in width, shall be limited to:
Movements on Tuesdays, Wednesdays, and Thursdays.
(2) Restricted to highways
featuring a minimum pavement width of 24 feet 0 inches and minimum paved
shoulders of 8 feet 0 inches, from point of origin to point of
delivery. Special rules apply if a portion of the required route is less than 24 ft 0 in wide
If the permit office determines that the anticipated highway traffic or weather conditions indicate that the safety of the public would be increased or the likelihood of damage of roadside objects would be reduced by requiring non-police or state police escort vehicle(s) not already required, the permit office shall require such additional escort vehicle(s).