Quebec has a particular but very comprehensive road network.
Hitch-hiking on Quebec expressways is de facto illegal, but tolerated in certain areas, mainly rural. It is recommended to not hitch along the expressways in Montreal Metropolitan Area including the A-40 (A-440), A-13, A-15. Neither on the motorway junctions in Trois-Rivières or Quebec city (A-40, A,640, A-20) as these are places are pretty dangerous.