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Like most Canadian transportation regulations, the commercial vehicle size and weight limits are enforced at the jurisdictional level. In order to create uniformity in vehicle dimensions and weights throughout Canada, the Canadian jurisdictions agreed to a “Memorandum of Understanding” (MOU) on vehicle size and weights. A task force within the Council, the Task Force on Vehicle Weights and Dimensions Policy, periodically meets to discuss possible areas for improvement and to decide on updates to the MOU, if warranted.

Scope

Created by the Council of Ministers of Transportation and Highway Safety, the MOU establishes standard height, width, length, and weight limits for eight common vehicle configurations.

Regulatory citations

  • None

Key definitions

  • None

Summary of requirements

The MOU establishes the following size and weight limitations:

Height, including load 4.15 m
Width, including load but excluding mirrors, lamps, and load covering or securing devices 2.6 m
Length, including load Category 1: Tractor-semitrailer23 m
Category 1A: Tridem Drive Tractor Semitrailer23.5 m
Category 2: A-Train Double25 m
Category 3: B-Train Double27.5 m
Category 4: C-Train Double25 m
Category 5: Straight Truck12.5 m
Category 6: Truck-Pony Trailer23 m
Category 7: Truck-Full Trailer23 m
Category 8: Intercity Bus and Recreational Vehicle14 m
Weight
Tractor-semitrailer46,500 kg
Tridem Drive Tractor Semitrailer52,300 kg
A-Train Double53,500 kg
B-Train Double62,500 kg
C-Train Double58,500 kg
Straight Truck24,250 kg
Truck-Pony Trailer45,250 kg
Truck-Full Trailer53,500 kg
Intercity Bus and Recreational Vehicle24,250 kg
Axle weights. The following applies to axles:
  • Loads shared between adjacent axles in a group must not vary by more than 1,000 kg.
  • 10 kg/mm of tire width.
  • Each semitrailer has only one axle group consisting of either a single axle or a tandem or tridem group that will achieve equalized load sharing between axles in the group.
Additional conditions and restrictions. Seasonal restrictions may apply in the jurisdictions, especially during the spring thaw period.

Liftable axles are generally prohibited; however some jurisdictions may recognize them.

Even though the MOU is in place, the jurisdiction may adopt less-restrictive size and weight limits for roads within the jurisdiction. Refer to the individual jurisdictions' size and weight regulations for more information.

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