Solid evidence supporting prophesies by leading geographers that future developments in southern Ontario and Quebec will create an industrial super-giant among giants is Canada's Macdonald-Cartier Freeway - Highway 401. Capable of speeding heavy volumes of traffic from Windsor and Detroit through the northern sprawl of the mighty Toronto megapolis to within sight of Montreal's glistening skyline, this 510-mile highway is about to link up with its counterpart in Quebec and sweep on for another 235 wheel-humming miles. This unique transportation artery, cutting across the rich heartland of Ontario and Quebec and following the St. Lawrence Seaway and River is based on a firm bedrock of geographical facts. A 25-mile band either side of its full length from Quebec City to the western end of Lake Erie contains less than one per cent of Canada's nearly 4[??],000 square miles. Yet, this one per cent of the nation contains nearly two thirds of its population, 40 per cent of its commercial agriculture and 85 per cent of its industrial activity. Such facts created the necessity for the highway and the highway in turn is now creating even greater growth along its length. With the new Macdonald-Cartier Freeway this part of Canada will develop at an even more amazing rate of acceleration.