I don't know the exact "cost", which may be too complicated to calculate it, including car,maintenance,gas,insurrance, even tickets.... 7 x: d7 z/ k" @$ Q1 R/ R! n- p- z, `1 c) R
For me, I think car-pool is just to share part of gas "cost" and have some fun on road..... & z4 n( W& k" a+ X' g + i [4 A( J2 ~) d" jI usally charge passager 30 bucks for a trip.