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Methodology to Estimate Volume–Capacity Ratios at Traffic Signals Based on Upstream-Link Travel Times
| 题名： | Methodology to Estimate Volume–Capacity Ratios at Traffic Signals Based on Upstream-Link Travel Times |
| 其他题名： | Acyclica.(2014)."Acyclica analyzer user guide."〈http://www.acyclica.com/?page_id=617〉(Mar.1,2016). |
| 正文语种： | 英文 |
| 作者： | Jaehyun (Jason) So |
| 关键词： | Volume-capacity ratio;Travel time;Volume-delay function;Traffic signals;Intelligent transportation systems |
| 摘要： | This study utilizes travel time data from a well-equipped Intelligent Transportation System corridor to integrate travel time and traffic signal data with the goal of developing a volume-delay relationship between a signal's volume-capacity ratio and travel time. Specifically, the traffic signal timings were retrieved from an advanced transportation management system, individual travel time data were extracted from a WiFi-based travel time measurement system, and traffic volumes and queues were obtained by observing closedcircuit television video recordings. The collected data were then integrated on a cycle-by-cycle basis by using a C#-automated data postprocessing interface. Several traditional volume-delay functions were calibrated to fit the field data. Also, a new volume-delay function, named So-Stevanovic Volume-Delay Function, was developed to account for exponential behavior of travel time near and beyond the traffic saturation point. The So-Stevanovic Volume-Delay Function satisfied the seven Spiess's requirements for a well-behaved congestion function and produced slightly better results than the best traditional volume-delay function. All of the functions were then tested again on a different road segment in order to validate the results. These tests confirmed the previous findings that the So-Stevanovic Volume-Delay Function was the best predictor of relationship between volume-capacity ratio and link travel time. Further research should be conducted to validate this function in a variety of field traffic conditions. |
| 出版年： | 2017 |
| 论文唯一标识： | P-72Y2017V143N04005 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/JTEPBS.0000021 |
| 期刊名称： | Journal of Transportation Engineering |
| 拼音刊名(出版物代码)： | P-72 |
| 卷： | 143 |
| 期： | 04 |
| 页码： | 28-40 |
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