Which is the longest trans-continental railway of North America?

Explanation

Trans-Canadian Railway is the longest trans-continental railway of North America. Features:
Trans Canadian railway is 7050km long and runs from Halifax in the east to Vancouver to the West, through Montreal, Ottawa and Winnipeg. It was initially constructed as a part of an agreement to make British Columbia on the West coast join federation of states. It gained economic significance because it connected the Quebec-Montreal industrial region with the wheat belt of the Prairie region, and the coniferous forest region in the north, thus making each of them complimentary to the other. A loop line connects it to the important waterways of the world. It is the economic artery of Canada, and wheat and meat are important exports on this route.