owadays traffic congestion is a big problem in most of our cities.have you got any ideas about what has brought about this and how to solve it? there are many causes for this problem，but the following may be the most important ones. the first cause is the great increase in the number of private cars.cars take up more space but they carry fewer people.some private car drivers，ignoring(忽视)traffic regulations，drive only for the sake of their own convenience，blocking the way of other public transportation vehicles.the second cau
