Traffic problem is the biggest problem in many cities. In Viet Nam, I think the city which has the worst traffic is Da Nang. The first problem is the traffic jam here. On the rush hour of the day, there' re too many people using the roads. Secondly, the roads are narrow and bumpy. It makes traffic become dangerous. Thirdly, many people do not obey traffic rules, which cause traffic accidents. Besides, some people let wild animals run across the road, which cause danger for road users. Finally, many young people ride their motobike dangerously. So people should obey traffic rules to decrease traffic jams.