I don't know the exact "cost", which may be too complicated to calculate it, including car,maintenance,gas,insurrance, even tickets.... * }0 J# n* E0 m- }$ W3 k; G6 ?/ H, D( W: \% K
For me, I think car-pool is just to share part of gas "cost" and have some fun on road..... 1 A% k# B' E' A# p# \! A/ h( n- Z. x! T7 X( m! D
I usally charge passager 30 bucks for a trip.