With the development of the economy,more and more people in China can afford their private cars.Surely enough,family cars or private cars can really enlarge the space of their activities.But we have to say that family cars have brought lots of problems,such as traffic jams,traffic accidents and air pollution as well.In what way can we reduce the family cars?That's a serious problem we have to face and solve.I think we must develop the public traffic,for example,the bus,subway and taxi.And meanwhile,we have to build more highways. With the development of the economy,more and more people in China can afford their private cars.Surely enough,family cars or private cars can really enlarge the space of their activities.But we have to say that family cars have brought lots of problems,such as traffic jams,traffic accidents and air pollution as well.In what way can we reduce the family cars?That's a serious problem we have to face and solve.I think we must develop the public traffic,for example,the bus,subway and taxi.And meanwhile,we have to build more highways.