Transportation Updates

Special Permits to Operate B-Trains 27.5 metres in Length

The Ministry of Transportation will issue Special Vehicle Configuration (SVC) permits starting in January 2015 to allow permit-holders to operate B-train double trailer combinations up to 27.5 metres in length, up from the current limit of 25 metres. Furthermore, longer B-trains are allowed to have tractors with wheelbase up to 6.8 metres from the current 6.2 metre limit. However, the sum of the trailer wheelbases would have to be reduced according to a trade-off table included in the permit. Permits are available on a fleet or individual carrier basis.

The 27.5 metre limit will allow carriers to use longer tractors. Longer tractors are better able to support technology that meets air quality and greenhouse gas emission mandates. They can also be more comfortable for drivers by providing the ability to operate larger sleeper berths. B-trains are some of the most stable and safe vehicle combinations on the road. Simulated testing and analysis provided by the Canadian Trucking Alliance (CTA), has shown that stability and controllability do not deteriorate. MTO has determined that there are no safety issues or major operational issues operating longer B-trains on Ontario roads. Furthermore, longer length limits can allow for an increase in safety by facilitating the use of moose bumpers.

Permits to operate Extended Tractor B-Train Double Trailers up to 27.5 metres inoverall length are available on request by:

  • Email:
  • Fax: 905-704-2545
  • Mail:
    Ministry of Transportation
    Permit Office
    301 St. Paul Street, 3rd Floor
    St Catharines, ON L2R 7R4