I live in Hanoi where there are many traffic problems. There are many reasons that causes these situations. Firstly, there are too many vehicles in Hanoi like buses, cars, bikes....Secondly, almost the streets and roads are too narrow and bad so when it rain heavily, they are looded. As a result, there are many traffic accidents. Finally, Vietnamese people often don't obey traffic laws such as going to fast, riding motobikes on the sidewalk... Although I love Hanoi so much, I think that Hanoi should be changed. Everyone will obey the traffic rules. If that, the traffic problems will be controlled well. ^^