I just did the math. It costs me less money to drive to work than take public transportation. The proofs:
Driving = 30.6 miles round trip / 20 mpg* x $2.50/gallon** = $3.83 per day
Light rail = 7.4 miles round trip / 20 mpg x $2.50/gallon + $3.20 fare = $4.13 per day
It should be noted that I get free parking downtown. Otherwise, light rail would win by as much as fifteen dollars. I will further grant that taking the light rail would give me about two hours’ reading time each day and that the earth would love me more. But at this point in my career---newly printed J.D. still smells like the calligrapher’s cologne---I sell out the earth for just 30 cents a day.
*I actually get a little better (usually around 23), but I wanted to give public transportation as much help as I could.
**Last night, I bought gas for $2.31 per.