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Estimating Benefits from Specific Highway Safety Improvements: Phase 1. Feasibility Study; Final rept
| 题名： | Estimating Benefits from Specific Highway Safety Improvements: Phase 1. Feasibility Study; Final rept |
| 作者： | Yuan, F.; Ivan, J.; Davis, C.; Garrick, N. |
| 关键词： | Safety engineering; Highway improvements; Accident prevention; Two lane roads; Benefits; Accident prevention; Feasibility; Highway engineering; Rural highways; Evaluation; Site selection; Accident risk forecasting; Procedures; Literature review; Highway safety |
| 摘要： | One task of a traffic engineer is to identify accident locations and to design treatment for reducing the number of crashes. This process relies on the availability of accurate information on the crash reduction efficacy of the various treatments. Currently the authors are conducting a before/after type study to develop crash reduction factors for modern conditions on two-lane rural highways. This paper reports on the results of the first phase of this study, which was aimed at determininig the feasibility of collecting the required information and developing a procedure for evaluating improvements. The issues addressed at this phase were an assessment of the availability and reliability of data and development of a comprehensive procedure for the overall study, including suitable analytical methodologies. In this paper the authors report on the site selection process, the data sources (including use of the Connecticut Department of Transportation Photolog) and an analysis of before and after data for several sites treated. Two different methods of analysis were investigated - confidence intervals and likelihood functions. The authors feel that both methods have merit for quantifying the magnitude of the accident reduction factors. |
| 总页数： | 50p |
| 报告类型： | 科技报告 |
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