Estimating travel times and vehicle trajectories on freeways using dual loop detectors
Estimating travel times and vehicle trajectories on freeways using dual loop detectors
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DOI：
10.1016/s0965-8564(01)00007-6
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发表时间：
2002-05
影响因子：
6.4
通讯作者：
B. Coifman
中科院分区：
文献类型：
--
作者：
B. Coifman
最近的研究调查了各种测量高速公路连接时间的方法。这种研究的部分原因是，人们认为，对用户来说，旅行时间比测量站的本地速度测量值提供的信息更多。但直接的旅行时间测量需要在多个地点进行车辆观测的相关性，这反过来又需要新的通信基础设施和/或新的探测器硬件。本文提出了一种利用单个双环检测器的数据估计链路行进时间的方法，而不需要任何新的硬件。该估计技术利用基本交通流理论，将局部条件外推到延伸的路段。在估计行驶时间的过程中，该算法还对车辆轨迹进行了估计。工作表明，如果在一个链接中没有延迟来源，例如事故，那么旅行时间估计是非常好的。
Recent research has investigated various means of measuring link travel times on freeways. This search has been motivated in part by the fact that travel time is considered to be more informative to users than local velocity measurements at a detector station. But direct travel time measurement requires the correlation of vehicle observations at multiple locations, which in turn requires new communications infrastructure and/or new detector hardware. This paper presents a method for estimating link travel time using data from an individual dual loop detector, without requiring any new hardware. The estimation technique exploits basic traffic flow theory to extrapolate local conditions to an extended link. In the process of estimating travel times, the algorithm also estimates vehicle trajectories. The work demonstrates that the travel time estimates are very good provided there are no sources of delay, such as an incident, within a link.