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Optimal Placement of Point Detectors on Virginia's Freeways: Case Studies of Northern Virginia and Richmond.
| 题名： | Optimal Placement of Point Detectors on Virginia's Freeways: Case Studies of Northern Virginia and Richmond. |
| 作者： | P. Edara; J. Guo; B. L. Smith; C. McGhee; |
| 关键词： | detectors,traffic monitoring,travel times,point detectors,decision support methodologies/case studies, data collection, performance monitoring, virginia, optimal locations, freeway corridors/case studies, data collection, performance monitoring, virginia, optimal locations, freeway corridors |
| 摘要： | In Virginia, point detectors in the Northern Virginia and Hampton Roads regions are placed at approximately one half mile spacing. This density is a product of early requirements for incident detection that have proven ineffective and perhaps unnecessary. There are other important uses of the data that likely have different requirements for detector placement than the original incident detection focus. For example, there is a desire to derive travel time estimates from the point detector data for the purpose of performance monitoring. To do this, the detectors are to be placed so as to effectively sample the conditions on a freeway. Unfortunately, little guidance exists on how to place detectors for effective sampling. The purpose of this research project was to develop a decision support methodology to identify the optimal locations of a finite set of point detectors on a freeway corridor in order to minimize the error in travel time estimation, within the constraints of available capital and maintenance funding. Case studies of freeway sections in three regions were conducted to demonstrate the utility of the newly developed tool. While there are potentially other important uses of the data collected by freeway point detectors, the recommendations in this report deal specifically with the issue of travel time estimation. / Supplementary Notes: Sponsored by Virginia Dept. of Transportation, Richmond. / 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 5301 Shawnee Road, Alexandria, VA, 22312, USA. / NTIS Prices: PC A04 / Corporate Author Code: 089346000 / Classifivation: Unclassified report |
| 报告类型： | 科技报告 |
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