Ministry of Transportation / Ministère des Transports
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II. Sharing the road
Driving in roundabouts

Allow extra room alongside large vehicles (trucks and buses). They may have to swing wide on the approach or within the roundabout.

Driving a large vehicle in a roundabout
A driver negotiating a roundabout in a large vehicle (such as a truck or bus) may need to use the full width of the roadway, including the central apron (a mountable portion of the centre island adjacent to the roadway), if provided. Prior to entering the roundabout, the vehicle may need to occupy both lanes. Remember, the vehicle in the roundabout has right-of-way. You must ensure your vehicle is in the appropriate lane for both entry and exit.

Many roundabouts are also designed with a central apron, a raised section of pavement around the central island that acts as an extra lane for large vehicles. The back wheels of the oversized vehicle can ride up on the central apron so that the truck can easily complete the turn, while the raised portion of concrete discourages use by smaller vehicles.

Diagram showing a bus moving safely through a roundabout
Diagram 2-15