9-axle winter permit

The 9-axle winter permit is available during winter months when weights are restricted on Northwest Territories highways and must be purchased prior to entering the territory.

The permit allows a super b-train to carry an additional 500 kilograms (kg) per axle, not including the steering axle.

Apply online

If it is your first online application: call 1-866-225-3505 to create an account. 

Once purchased online or through a third-party issuer, this permit requires final approval by a Highway Transport Officer by calling 1-866-225-3505 (Monday to Friday, 8:00 a.m. to 5:00 p.m.).

Permit rules

  • Permit is valid for a one-year period.
  • Permit holders are only allowed to operate between Hay River and mines north of Yellowknife. Loads can be shipped to Yellowknife, but the product must be destined for the mines, north of Yellowknife.
  • The commodities being hauled are restricted to fuel, cement, shotcrete, and prill.
  • The vehicle weight/load must not exceed the maximum load that the manufacturer has rated the vehicle capable of carrying or pulling.
  • The GNWT reserves the right to terminate this permit at any time if it is deemed necessary to protect the transportation infrastructure or if there is a safety concern. The decision to terminate this permit will be based on highway inspections, highway transport officer observations and safety requirements and all decisions to cancel the permits based on these factors will be final.
  • All highway restrictions, such as weight restrictions, must be adhered to.
  • The wheelbase of the tridem drive tractor must be between 6.6 and 6.8 metres.
  • The maximum length of the unit must not exceed 27 metres. 
  • Permits must record the steering tire size of the tridem drive tractor. 
  • The gross weight of the unit will be based on the following weight restrictions:
    • Steering axle: minimum of 5,500 kg to a maximum of 7,300 kg based on 100 kg per centimetre of tire width
    • Tridem drive axles: maximum of 23,000 kg
    • Tridem lead trailer: maximum of 24,000 kg (tridem axle spread must be between 3 and 3.7 metres, spreads under 3 m cannot exceed 21,000 kg). 
    • Tandem pup trailer: 17,000 kg
    • Total maximum gross vehicle weight: 71,300 kg (maximum weight, provided that the steering tires have the appropriate width and axle spread limits).
  • When crossing the Frank Channel Bridge on Highway 3, drivers must:
    • reduce speed prior to driving on the bridge
    • maintain 10 km/h or less
    • drive with a steady speed with no stopping or braking


  • 9-Axle Winter Permit: $237.00 (each tractor)

9-Axle Winter Permit: $237.00 (each tractor)