In Québec, what are the maximum legal dimensions of a vehicle that can be driven without a special permit?

The maximum length of any road vehicle or combination of road vehicles, load included, depends on the type of vehicle.

Bus

Articulated bus

Truck with trailer	Tractor with semi-trailer

____________

¹ Until December 31, 2009, this maximum dimension is replaced by a limit of 5 m between the last axle and the rear end of the vehicle, load included, for vehicles assembled before the month of November 1998.

Farm tractor and two trailers	A train
B train	C train

__________

¹ Until December 31, 2009, this maximum dimension does not apply to tractors assembled before the month of January 1999.

Saddle-back transport

Length

Length : 10 m or under	Length : Over 15.5 m but not exceeding 16.2 m
Authorized for all axle classes	Authorized for single, tandem, or triple axles.
Length : Over 10 m but not exceeding 14.65 m	Length : Over 14.65 m but not exceeding 15.5 m
Authorized for all axle classes	Authorized for single, tandem, or triple axles and for axle classes B.44 and B.45.

__________

¹ Setting of the kingpin (radius: 2 m max.).
² This dimension does not apply to semi-trailers with a removable goose neck.
³ Maximum 35 % (load included) of the distance between the centre of the single, tandem or triple axle and the centre of the kingpin.

Trailer with dolly	Trailer without dolly
The maximum dimension does not include the coupling system of the dolly.	This maximum dimension includes the coupling system of the trailer.

__________

¹ Until December 31, 2009, this maximum dimension is replaced by a 14.65 m limit for trailers assembled before the month of November 1998, and the 4 m limit does not apply.