With the help of video detection and recognition methods , we can sample real - timely traffic messages , such as traffic flow , road situation and so on , and get the relative information so as to avoid traffic jam before it happens , on the other hand , to real - time traffic breach detection , video detection and recognition methods is also very effective , especially , it can provide strong evidence for traffic policemen 通过视频图象的检测与识别，可以对道路的交通流、路况等实时监视，提取交通流信息(车流量、车道占有率、车速等) ，在交通拥挤未发生时，及时采取措施、疏导交通、防止交通拥挤发生；另一方面，通过视频图象的检测与识别，还可以实时检测交通违章现象、识别违章车辆的车牌号码，为公安交通管理部门提供强有力的执法证据。
