At a T-intersection with no signs or signals controlling priority, does the shape of the roads alone give all vehicles on the continuing road automatic priority?

Correct answer: No. Apply the normal rules, such as yielding to the right.

Why

Do not decide priority from the T shape alone. Unless signs or signals say otherwise, Quebec's general rule at an intersection or junction requires yielding to a vehicle approaching from your right on the road you will cross or join when your movement would create a danger. Other duties, such as yielding during a left turn or when leaving private property, can also apply. Observe the actual controls, traffic and intended movements before proceeding.

Verified against Code de la sécurité routière (Québec), official French consolidation · Intersections and right-of-way