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Legal weights and dimensions - New Brunswick

RegSenseState InfoNew BrunswickWeights and dimensionsFleet SafetyBest ResultsFocus AreaFleet OperationsEnglishSize and Weight LimitsTransportation

All Highways
*Gross masses over 43,500 kg are restricted from some highways. Check with the N.B. Department of Transportation for specific route restrictions if hauling loads over 43,500 kg.
Width:2.6 m(Rearview mirrors may extend on each side of a vehicle not more than 30 cm, and load-securing devices may extend on each side of a vehicle not more than 10 cm)
Height:4.15 m(13 ft 6 in.)
Length:
Straight trucks12.5 m(41 ft)
Truck-Trailer23 m(75 ft 6 in.)
Tractor-semitrailer combinations23 m(75 ft 6 in.)
Tractor-twin-trailer combinations23 m
Semitrailers16.2 m(53 ft)
Trailers of twin-trailer combinationsN/S
Special limitations or restrictions16.2 m trailers must have rear impact guard; conspicuity markings, and max. length of tractor/trailer must not exceed 23 m.
Weight:
Single axle9,100 kg
Tandem axleSee Schedule A of the New Brunswick Vehicle Dimensions and Mass Regulation, 2001-67, at http://tinyurl.com/NBsizeandweight.
Triple axleSee Schedule A of the New Brunswick Vehicle Dimensions and Mass Regulation, 2001-67, at http://tinyurl.com/NBsizeandweight.
Steering axle5,500 kg (tractor)
8,000 kg (truck)
16,000 kg (any vehicle with tandem steer axle)
Super singles7,700 kg/axle(with 445 mm or greater tire; permit required see http://tinyurl.com/NBsupersingle)
Load per mm/width10.0 kg/mm
Gross vehicle weight*See Schedule A of the New Brunswick Vehicle Dimensions and Mass Regulation, 2001-67, at http://tinyurl.com/NBsizeandweight.
ToleranceN/S

New Brunswick’s complete size and weight regulations can be found by visiting http://tinyurl.com/NBsizeandweight.

Wheelbase Limits

A truck, truck-tractor, trailer, semitrailer or any combinations of those vehicles may not exceed the maximum wheel bases or be less than the minimum wheelbases in the following diagrams and tables; however, a truck-tractor may have a wheelbase that exceeds 6.2 metres if it isn’t combined with another vehicle. In addition, a truck-tractor with a wheelbase greater than 6.2 metres may be operated in combination with a single semitrailer if:

  • The wheelbase is less than 7.2 metres,
  • The wheelbase does not exceed “X” in the following formula:
    • X = 25-(1.5 x length of wheelbase of semitrailer)
  • All other dimensions are legal.

Single wide tire permits

New Brunswick allows vehicles to operate with single wide tires having a minimum width of 445 millimetres. Such vehicles may operate under an annual permit.

The conditions of the permit are as follows:

Maximum tire width445 mm
Maximum weight on a single axle7,700 kg
Maximum weight for a tandem group15,400 kg
Maximum weight for three-axle groups with the following axle spreads:
2.4 m to < 3.0 m21,000 kg
3.0 m to < 3.6 m23,000 kg
3.6 m or more23,100 kg

In order to operate at 7,700 kilograms per axle, all axles within the group must have single tires with a width of at least 445 millimetres. Such vehicles may only operate on routes listed in Part III and IV of Schedule “B” of New Brunswick’s Vehicle Dimensions and Mass Regulation, 2001-67. On all other routes, the maximum weight is limited to 6,160 kilograms.

See http://tinyurl.com/NBsupersingle.

Frost laws

New Brunswick’s spring weight restrictions may be viewed online at http://tinyurl.com/NBfrostlaws.

Law

Motor Vehicle Act, Section 254(4.1)

Regulation

Vehicle Dimensions and Mass Regulation, 2001-67

View agency contacts

['Size and Weight Limits']
['Weights and dimensions']
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