<div>With the developing of the ecnomic,the traffic condictions in some big cities is becoming more and more worse,especially in the rush hour. It has caused a lot of inconvenience to people's life and work.In my opinion, there are several reasons for the traffic jam. The first cause is the great increase in the number of private cars. Cars take up more space but they carry fewer people. The second cause is the slow and inefficient construction and improvement of the roads and streets. With a large population and numbers of automobiles increasing, some roads still remain unimprove, which will surely lead to problems. Third, some pedestrians and drivers ignore traffic regulations.</div><div><br></div>