traffic accidents With more and more severe social competition in the modern society, it is inevitable that people need to drink alcohol at some occasions to build up relationships with business partners, especially in the metropolitans like Beijing and shanghai. In addition, when drivers were driving in some familiar roads, they didn’t pay enough attention to it, which posed a grave threat to pedestrians’ safe. Moreover, people’s weak safe awareness is another significant factor that we can not ignore. Many of pedestrians are often distracted by their mobile phones instead of focusing on the transport situation.