[esquire]

^ Fun fact, a little over 100 years ago, CP double tracked the entire Winnipeg-Thunder Bay route. This was in the heyday of grain shipping at the Lakehead. It was the only long stretch of double track outside of an urban area in Canada at the time.

It was replaced with single track (not sure exactly when, possibly in the 60s or 70s?) on the basis that Centralized Traffic Control would allow for sufficiently efficient use of a single track line without the expense of running two separate lines.