If you spend a night in the Fraser/Thompson Canyons it's not uncommon to hear a half dozen trains go by in the dark. Trains run 24 hours a day, 7 days a week, and 365 days a year. In addition to heat, cold, noise, vibration, and exhaustion running trades must also contend with tunnel vision during night runs as demonstrated by this photo taken in an AC4400CW cab - 15 Nov 2005 Doug McKenzie.