基于小波变换的城市道路交通事件检测

利用出租车浮动车数据对城市道路行程车速的表达能力,针对出租车空车和重车2种数据运用小波变换技术分析了城市道路交通状态突变点,据此进行了城市道路交通事件的检测。区别于以往小波变换技术,首先运用于数据降噪,再将处理数据运用交通事件检测算法判断,直接采用小波变换技术实现了对城市道路间断流的交通事件的检测。并利用实际采集数据对提出的交通事件检测算法进行了验证,结果表明算法能够对交通事件进行更综合的检测,检测准确度得到了提高,能够为城市交通信息发布和交通诱导提供更加可靠的信息。

Traffic Incident Detection for Urban Road Based on Wavelet Transform

Based on taxi floating car data（FCD） including the idle taxis and the occupied taxis,and on wavelet techniques that have demonstrated superior performance in detecting changes in signals in electrical engineering,the urban traffic state catastrophe is obtained by analyzing the data of both idle and occupied taxis with wavelet transform.Unlike the existing wavelet incident detection algorithm,where the wavelet technique is utilized to denoise data before the data is input into the real detection algorithm,this paper directly applies the wavelet technique to incident detection for urban interrupted traffic flow.Then,the method of traffic incident detection is established for urban road detection,which can avoid the risk of misjudge on the traffic incident detection.