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原文传递 Method for Allocating Multitype Sensors on a Freeway Corridor with Existing Sensors

题名：	Method for Allocating Multitype Sensors on a Freeway Corridor with Existing Sensors
其他题名：	Asudegi,M.,and Haghani,A.(2013)."Optimal number and location of node-based sensors for collection of travel time data in networks."Transp.Res.Rec.,2338,35–43.
正文语种：	英文
作者：	Fengping Zhan
关键词：	Sensor allocation problem;Multitype sensor;Freeway corridor;Objective optimization model;Genetic algorithm–based optimization algorithm
摘要：	For the limitation of technology and cost, the in-roadway sensors sparsely deployed on freeway corridors have been common in the past. Currently, such layouts of sensors can barely satisfy data acquisition requirement for freeway traffic management and organization. Thus, how to efficiently utilize the existing deployed sensors and to add additional sensors within the constraint of budget to satisfy the data acquisition requirement needs to be analyzed. This study discusses the allocation of the add-on sensors to make up for the inadequacy of the precision and the coverage of existing deployed sensors. An objective optimization model was developed to identify the locations of the add-on sensors. To solve the model, a genetic algorithm–based optimization program was proposed. A case study of Ning-Hang freeway in China's Jiangsu province was conducted to demonstrate the utility of the developed methodology. The results demonstrated that the proposed method was efficient in allocating multitype sensors to improve the accuracy of travel time estimation within certain constraints. Travel time estimation error could be decreased by increasing the number of sensors; however, optimizing the locations of sensors is more efficient than just increasing the number of sensors. An optimal value for the number of sensors exists; increasing this value will not improve the estimation accuracy but cause sensor redundancy, and reducing it will affect the estimation accuracy.
出版年：	2017
论文唯一标识：	P-72Y2017V143N11004
英文栏目名称：	TECHNICAL PAPERS
doi：	10.1061/JTEPBS.0000090
期刊名称：	Journal of Transportation Engineering
拼音刊名(出版物代码)：	P-72
卷：	143
期：	11
页码：	11-20