Driving alone into work, my commute costs:

My daily roundtrip mileage:
X 21 workdays/month = X 44.5 cents/mile* = + $ for Parking
= a month.

But, if I use a

MBTA or Private Bus

My monthly fare is/would be $ + $ for parking = a month.
I save a month by not driving alone.
(MBTA Bus, $40; Link Pass $59, Commuter Rail Zone 1-8 $135 - $250)

Carpool

My total cost of driving alone is / passenger = a month.
I save a month by not driving alone.

Vanpool

My monthly fare is/would be $ a month.
I save a month by not driving alone.

The hardest part of Ridesharing is figuring out what to do with all the money you are saving!

*2005 IRS estimated cost of operating and maintaining a car.