I don't really like breaking down cost of trips to much. It is one reason why I don't bike to work right now. The other reason is 7am is REALLY early. If it only costs $0.52 to drive to work and back why would I bike?
2008 EPA adjusted:
Distance traveled by bicycle in 2007= 1,830ish miles
Average commute speed=25mph (yes, that's in a car)
$169 a month???? Holy crap! How far away is that school and how much are those tolls???
I have all of my costs and mileage broken down in an Excel sheet so I already know my monthly driving tally is $52.86 a month since I bought the Metro...exactly 9 months ago I just realized (Sept. 19, 2005).