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原文传递 Assessing the performance of SpeedInfo radar traffic sensors

题名：	Assessing the performance of SpeedInfo radar traffic sensors
其他题名：	Chase,R.T.,Williams,B.,Rouphail,N.,&Kim,S.(2012).Comparative evaluation of reported speeds from corresponding fixed-point and probe-based detection systems.Transportation Research Record:Journal of the Transportation Research Board,(Issue 2308),s110–s119.Retrieved from https://trid.trb.org/View/1128607
正文语种：	英文
作者：	Seoungbum Kim
关键词：	freeway traffic;performance evaluation;SpeedInfo;speed measurement
摘要：	Traffic speed is a crucial input for real-time traffic management applications. Operating agencies typically deploy their own sensors to collect the measurements, e.g., loop detectors. Recently, SpeedInfo emerged with a different paradigm for traffic speed collection: instead of selling hardware to operating agencies, at each link the company deploys its own Doppler radar in a self-contained wireless unit tomeasure traffic speeds and then sells the speed data. This study useswell-tuned loop detectorbased speed measurements to evaluate 15 of the Doppler radar sensors over several monthswhile the two traffic data collection systems were operating concurrently. The extended study period includes potentially challenging and transient conditions for the radar sensors: both recurrent (rush hour congestion and late night low flow) and nonrecurrent (incidents and precipitation). The analysis took a broad overview, comparing speed measurements from the radar sensors against the concurrent loop detector data and then explicitly looked for any anomalous pattern in the radar data such as latency and system outages. The work found the radar measurements are generally good, but also identified several points that should be considered before deployment, including latency, different biases in free flow and congestion, vulnerability to precipitation, and sensitivity to mounting angle.
出版年：	2017
论文唯一标识：	J-96Y2017V21N03002
英文栏目名称：	Articles
期刊名称：	Journal of Intelligent Transportation Systems Technology Planning and Operations
拼音刊名(出版物代码)：	J-96
卷：	21
期：	03
页码：	179-189