12 miles (r/t commute) x 1 gallon/35 miles x $3.41/gallon = $1.17/day
$45 (yrly parking permit) + 125 (r/t's per yr) x $1.17 ($gas/day)= $191.25 saved/year
i still drive about 2000 miles/year:
$372 yrly insur + $150 yrly oil changes + (2000 miles/yr x 1gal/35 miles x $3.41/gal)= $194.86/yr
all bikes and car are paid for, so these are about even; but i've got my eye on a new carbon fiber steering wheel & cup holders
the air i get off that ramp some kid leaves on the sidewalk on my route to campus = priceless