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首页> 美国政府科技报告 >Field Evaluation of Selected Delineation Treatments on Two-Lane Rural Highways.
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Field Evaluation of Selected Delineation Treatments on Two-Lane Rural Highways.

机译：双线乡村公路选择性划分处理的现场评价。

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摘要

The objectives of the research project were to establish relationships between traffic performance and accident probability on two-lane rural highways;to develop an experimental design for field testing the effectiveness of conventional and novel delineation treatments;to evaluate the effect of selected delineation treatments on traffic performance and associated accident probability;and to make recommendations for the design and use of delineation treatments. In the first phase of study,regression analysis was used to correlate delineation-related accident potential to a few systematically derived speed and lateral placement measures. In the second phase of study,additional accident and traffic performance data were collected to test the correlation models and to evaluate the safety effectiveness of 21unique delineation systems. Chapters of this Final Technical Report cover the conceptual planning,traffic performance studies,accident analyses,and regression modeling of Phase I,plus the experimental design,field studies,model checking,and treatment effectiveness evaluations of Phase II. The two most sensitive indicators of hazard were found to be off-center driving and longitudinal changes in lateral placement variance. Recommendations are offered with respect to a generalized delineation evaluation methodology,as well as for the immediate implementation on two-lane rural highways of a 10:30broken centerline pattern,narrower edgelines,and the selective use of raised pavement markers and post delineators.

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