Road train

​​The operation of driving a road train (often called Long combination of vehicles (LCV)) with a length exceeding the length authorized under the Vehicle Load and Size Limits Regulation may be authorized based on the conditions set out in the Special Road Train Operating Permits Regulation.

The framework set out in this regulation aims to ensure road user safety. The road trains targeted by this regulation generally consist of a road tractor hauling two semi-trailers, each of which can be up to 16.2 m long. This road train configuration is used for the transportation of high volume and low mass loads. ​

Normative framework

Section 463 of the Highway Safe​ty Code (Chapter C-24.2) prohibits the driving of outsized vehicles on public roads. However, the section stipulates that a special permit may be issued for certain situations.

Section 621 of the Highway Safety Code​ stipulates that the government can, by regulation, determine the formalities for obtaining a special permit and the conditions attached to such a permit. By virtue of this authority, the government has adopted the Special Road Train Operating Permits Regulation to govern the use of road trains over outside the norm.

Target clientele

The Special Road Train Operating Permits Regulation targets operators and drivers of heavy vehicles, shippers and transportation service intermediaries.

General information

The operation of a road train with a length exceeding the length authorized under the Vehicle Load and Size Limits Regulation is authorized on condition that the operator holds a special permit. The use of such vehicles is limited to divided highways and short road sections along these highways.

The rear of the second semi-trailer must be equipped with a sign, as set out in the Special Road Train Operating Permits Regulation. This sign is a pictogram of a black road train on a fluorescent yellow retro-reflective film. It is not required when the vehicle is configured as follows: tractor, semi-trailer and dolly.

The maximum total loaded mass limit is 67,500 kg. The axle categories and axle weight limits are determined by the Vehicle Load and Size Limits Regulation. This is true for height and width limits. This combination of vehicles is therefore outsized only in terms of length or total loaded mass.

The driver must have a special operating permit on hand as well as an attestation of competency to operate a road train (driver’s licence with a T endorsement or an attestation from a competent authority outside Québec). The maximum speed allowed is 90 km/h.

The special permit is issued for a period of 1 to 12 months. From December 1 to February 29, a list of safe stop locations, where the road train could be stopped in the event of unforeseeable deterioration of weather conditions, road conditions or visibility, must be prepared for the route planned. The operation of these road trains is also subject to other conditions.

Cost of permits

The cost of a special road train operating permit varies depending on the desired term of validity (1 to 12 months) and is the same as the cost of a Class 1 general permit under the Regulation respecting special permits.


Operating long combination vehicles in the winter and on Sundays​

As of November 29, 2019, the operation of long combination vehicles in December, January and February, as well as on Sundays, is authorized.

Renewal of authorizations to travel during public holidays, as well as during rush hours on the highways in the city of Québec and on the island of Montréal.

A ministerial order was published to this effect in the Gazette officielle. The validity period is from March 14, 2024, to July 1, 2026.

Legal references


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