I don't know the exact "cost", which may be too complicated to calculate it, including car,maintenance,gas,insurrance, even tickets.... + r# E, W+ U$ v" O* J* Y9 D+ g* H+ R4 f
For me, I think car-pool is just to share part of gas "cost" and have some fun on road.....) `' A9 L$ x4 I: W
) C" ]( e4 r' Z% j' M% l* m
I usally charge passager 30 bucks for a trip.