For those of us that have to deal with urban centres, a car is often extremely inconvenient. Add a half hour to your trip time just to park it. You have to go back and get it when it's time to leave instead of just hopping on the nearest train station, etc. That and cost of ownership. I'd rather spend the couple of bucks/quid/x00jpy to have someone take care of that for me and get off when I need to. Plus I'm less bored on the train because I can engage my mind with reading/work/games instead of yelling at all the drivers that are clearly not as good as me.