Carpool Coordinator

I think a good idea for a website would a carpooling website that would maximize carpool efficiency. Each person would enter in their home location where and when they need to go and when and where they would be willing to drive. If a large enough community were to use this service I think that it could become enormously efficient. Benefits included, decrease in traffic, less necessary road construction due to expansion and wear in the roads, increased community atmosphere, saves time for people not driving as they could engage in other activities.