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Quantifying Incident-Induced Travel Delays on Freeways Using Traffic Sensor Data.
| 题名： | Quantifying Incident-Induced Travel Delays on Freeways Using Traffic Sensor Data. |
| 作者： | wang, y. hallenbeck, m. cheevarunothai, p. |
| 关键词： | traffic congestion,traffic sensors,freeways,incident delay,queuing theory,travel delay quantification,freeway travel time/highways, washington(state), traffic control, countermeasures, queuing theories, algorithms/congestion-inducing incidents, department of transportation |
| 摘要： | Traffic congestion is a major operational problem for freeways in Washington State. Recent studies have estimated that more than 50%of freeway congestion is caused by traffic incidents. To help the Washington State Department of Transportation (WSDOT) identify effective countermeasures against such congestion-inducing incidents, a thorough understanding of travel delays caused by incidents is essential. This research project developed a new algorithm for quantifying travel delays induced by different incident categories using traffic data extracted from archived loop detector data and incident log data recorded by the WSDOT Incident Response (IR) team. The algorithm applies a modified deterministic queuing theory to estimate incident-induced delay using one-minute aggregated loop detector data. Incident-induced delay refers to the difference between the total delay and the recurring travel delay at the time and location associated with the impact of incident. The specialty of the delay calculation in this study is the use of a dynamic traffic-volumebased background profile, which is considered a more accurate representative of prevailing traffic conditions. According to the test results, the proposed algorithm can provide good incident-induced delay estimates and capture the evolution of freeway traffic flow during incident duration. Since the actual traffic data measured by loop detectors are used in this study to compute vehicle arrival and departure rates for delay calculations, the estimated incident-induced delay should be much closer to the reality than simulation based estimates. / Supplementary Notes: Sponsored by Washington State Dept. of Transportation, Olympia. and Federal Highway Administration, Washington, DC. / Availability Note: 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 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| 报告类型： | 科技报告 |
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