For many Canadians, the May long weekend means the official kick-off of the summer travel season. And if you're out on a road trip, there's a good chance you may end up sailing down the Trans-Canada Highway. Mark Richardson wants us all to know the often overlooked stories that paved this roughly seven-and-a-half thousand kilometre road system. The automotive journalist speaks with Piya Chattopadhyay about the history, people and politics that shaped "Canada's Main Street", as he explores in his book The Drive Across Canada.