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Chapter 5 Virginia's Top Five Percent High Crash Locations.
| 题名： | Chapter 5 Virginia's Top Five Percent High Crash Locations. |
| 关键词： | Accident Location; Countermeasures; Data Base Management; Highway Safety; Historical Data; Implementation; Information Systems; Motor Vehicle Accidents; State Highway Department; Traffic Volume; Trans |
| 摘要： | VDOT maintains 85 percent of the 72,000 miles of public roadways in Virginia. The Highway Traffic Records Information System (HTRIS) is a comprehensive data management system which maintains detailed records on current and historical road inventory, traffic volume and crashes. A new data warehouse called Roadway Network System (RNS) is under development to translate the linear referenced system to a geographical information system (GIS) platform. This effort will have great dividend for future transportation safety planning, but has resulted in some interim reporting difficulties as noted below. For identifying the high crash locations, VDOT conducted a two step data analysis; (1) the Rate-Quality Control Method for network screening, (2) the Crash Frequency Method for site prioritization using last three calendar years of crash and inventory data (2006 2008) available from HTRIS and RNS. At the time of this report, year 2009 crash data were not completely coded. However, for the last three reports the number and location of the top five percent sites have not changed substantially. As such, potential countermeasures proposed for improving safety with planning level estimates are summarized and updated from previous reports based on implemented and ongoing treatment studies. |
| 报告类型： | 科技报告 |
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