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原文传递 Traffic Signal Retiming Practices in the United States. National Cooperative Highway Research Program (NCHRP) Synthesis 409.

题名：	Traffic Signal Retiming Practices in the United States. National Cooperative Highway Research Program (NCHRP) Synthesis 409.
作者：	R. L. Gordon;
关键词：	traffic signal timing/automatic traffic control, highways, transportation planning, traffic safety, monitoring, implementation, data collection, performance evaluation, case studies/automatic traffic control, highways, transportation planning, traffic safety, monitoring, implementation, data collection, performance evaluation, case studies
摘要：	Traffic signals that are not timed to coordinate efficiently with vehicular traffic can cause travel delays, increased accident rates, increased pollution from vehicle emissions, and increased fuel consumption, among other concerns. Although many studies have shown that retiming traffic signals is a cost-effective expenditure of transportation agency resources, few agencies have developed regular programs to carry out the retiming process. The Urban Mobility Report and National Traffic Signal Report Card publicize the need for and public benefit of traffic signal retiming: these reports indicate that almost half of the transportation agencies surveyed (43%) do not regularly collect and analyze traffic data for signal timing, and many existing traffic data collection programs do not assess the quality of data collected. As a result, even agencies that do make an effort to compile traffic signal information may be using faulty data to analyze and time their traffic signals. Transportation agencies may need to explore new approaches to the signal retiming process in order to improve the quantity and quality of the traffic signal data collected and to streamline the use of new and existing resources. / Supplementary Notes: Sponsored by Transportation Research Board, Washington, DC. National Cooperative Highway Research Program. and Federal Aviation Administration, Washington, DC. / Availability Note: Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5301 Shawnee Road, Alexandria, VA, 22312, USA. / NTIS Prices: PC A06/MF A06 / Corporate Author Code: 102506000 / Classifivation: Unclassified report
报告类型：	科技报告