This is the Port Mann Bridge as Highway 1 crosses the
Fraser River less than a half dozen kilometers from downtown
New Westminster. Click it to load a live webcam shot.
In actuality, through most of the country, the Trans-Canada comprises several routes. Out west there's Highway 16, or the Yellowhead Highway which runs the Queen Charlottes in British Columbia through Edmonton, Alberta to Winnipeg, Manitoba. Closer to home is Route 1 with Mile 0 in Victoria. It runs though Calgary, Alberta to meet up with the more northerly route in Winnipeg.
There's an entrance to Highway One a few kilometers from here, so I tend to think of that naming designation for the TCH. When we drove to Newfoundland one summer, we were a bit surprised by how different the highway can be. It's pretty much left up to the provinces to build and maintain their portions. So although many sections are like freeways, there are parts where it is similar to a secondary-type road. Also, east of Winnipeg the numbering system goes out the window. Ontario, Quebec, Nova Scotia, and New Brunswick have no Route 1.