I don't know why it never occurred to me, but lately I've been thinking about the reliability of my bike commute. It seriously is like clockwork. My commute is 45 minutes (give or take 2-3 minutes) from the time I leave my house to the time I arrive at the gym where I change for work. It's 1 hour from the time I leave the office to the time I get home (including my walk to the gym and changing into bike gear).

When I drive, my commute can vary by 10 minutes to an hour depending on traffic. When I take public transportation, my commute varies by 15-20 minutes depending on what train I catch.

The only real variance on my bike commute is when something happens or if I decide to extend my ride. I think my wife likes the fact that if I leave the office at 5, I'm home at 6 -- like clockwork.