Transportation Networks of the St. Lawrence Lowlands

A Continental Corridor

The St. Lawrence Lowlands—stretching from Lake Superior to the Gulf of St. Lawrence—hosts dense, multimodal infrastructure serving Canada and the U.S.

Waterways

• St. Lawrence River: Primary shipping lane; connects Great Lakes via Welland Canal; major hydro source.
• Ottawa, Richelieu, Saguenay Rivers: Additional shipping and power.

Roads & Highways

• Highway 401: Windsor–Quebec City backbone.
• Highway 417: Ottawa–Montreal.
• Highway 20: Quebec City–Rimouski.

Railways

• Canadian Pacific: Vancouver–Montreal.
• Canadian National: Halifax–Vancouver.
• VIA Rail: Intercity passenger service.

Airports

• Montréal–Trudeau (YUL): Primary international gateway.
• Toronto Pearson (YYZ): Canada's busiest.
• Ottawa (YOW): Capital region.

Integrated Hub

This multimodal network makes the Lowlands North America's economic and demographic core.