In order to improve road safety, first thing we have to do is to understand the spatiotemporal mixed traffic flow condition for evaluating whether the traffic condition is safe or not.

• 摘要:为了解决道路安全的问题，首要工作是深入了解车流行为，进而提前得知车流行为的动态变化情形，以提供即时安全控制的决策判断所需资讯；