车辆类型识别，简单的车辆模型识别技术，通过交通灯来检测一条道路上车辆的多少-trafficpatterns- a simple model of vehicular traffic on four roads all leading to an intersection controlled by a traffic light. It turns green for each of the four paths with specified durations. Tweak the traffic light durations to study how much traffic builds up on the different paths.