【作者】 王力； 王川久； 张海； 范跃祖；

【Author】 WANG Li WANG Chuanjiu ZHANG Hai FAN Yaozu (School of Automatic Science and Electronic Engineering,BUAA,Beijing 100083)

【机构】 北京航空航天大学自动化学院；

【摘要】 固定点检测、高空探测、浮动车技术是三种主要城市动态交通信息采集方法,浮动车方法因具有采集范围大、效率高、成本低等特点而受广泛关注。对 GPS 浮动车系统进行了剖析,从理论上探讨了浮动车样本大小的计算方法,通过引入定位误差因子改进了 J.L.Ygnace 的浮动车样本计算模型。将该模型应用到对路段平均速度的最小方差估计中,利用美国 I-880高速公路的真实数据验证了改进模型的有效性。更多还原

【Abstract】 Stationary traffic sensors,space and air borne techniques and FCD are three main methods of urban dynamic traffic data collection.FCD has been paid more and more attentions because of its wide collection range,high efficiency and low cost.In this paper,FCD system based on GPS technology has been analyzed firstly.Then the key problem of FCD,the sample size based on J.L.Ygnace’s model is improved by adding wireless location error factor.According to the im- proved FCD sample size model,by using MSE method,average link speed is esti- mated using FCD data of America 1-880 highway.The estimation results show that our model can satisfy the average link speed estimation with 90% accuracy.更多还原