Many people think that having a private car will solve all their transport problems in a crowded city . yet,cars might be a source of trouble to their owners garagres have become so expensive and crowded that many people leave their cars for the night in the street exposing them to robbery. In rush hours, streets are so blocked that it takes a driver a very long time to get his destination. He may be late for a conference or arrive at the working place late enough, so,he has troubles with his boss.the worst trouble of all is parking .the streets are so crowded that a car owner may leave his car in a place where parking is not allowed