"Car pool" means sharing the car and sharing the cost of using. Because he is driving the car anyway, you don't have to pay for his time. It is not a taxi. You are kidding me. I know it. :-))
我住多伦多，在密西沙加找了份工作。单程50公里，乘车需要换2次，单程花4$. 单位一同事同意提供往返car pool, 我不知该付多少钱，请教各位DX.