I completed 27 years of mostly biking to work. I say "mostly" because I ride 2/3 or more of the time and take transit the rest. I cut back my days of work this year, so out of 194 commuting days, I drove a car once, took the bus 31.5 days and biked 161.5 days. The 1/2 day aberration occurred when I abandoned my bike at work one Friday because of freezing rain, and retrieved it by car on the weekend - that was my only car trip to work. It was a mistake as the Santa Claus parade was on and it would have been much faster to take public transit down and bike home, than fight the traffic and deal with the road diversions.