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Improve Sight Distance at Signalized Ramp Terminals of Partial-Cloverleaf Interchanges to Deter Wrong-Way Entries
| 题名： | Improve Sight Distance at Signalized Ramp Terminals of Partial-Cloverleaf Interchanges to Deter Wrong-Way Entries |
| 其他题名： | AASHTO.(1977)."Guide for selecting,locating,and designing traffic barriers."Washington,DC. |
| 正文语种： | 英文 |
| 作者： | Jin Wang |
| 关键词： | terminal；distance；barrier；section；balance；department；simulation；median；dimension；current |
| 摘要： | Providing drivers with open sight distance on entrance ramps can help prevent wrong-way entries at interchange terminals. For partial-cloverleaf (parclo) interchange terminals with close-spaced two-way ramps, appropriate intersection balance and median barrier lengths can provide motorists with a better view of entrance ramps and a better turning radius. A current best intersection balance practice by Washington State Department of Transportation (WSDOT) is to locate the stop line at no more than 60％ of the way through the intersection. However, this has not been proven for safety benefits. To fill this void, this paper provides a comprehensive evaluation of the impact of stop line positioning based on wrong-way crash data analysis. Effects of different lengths of the median barriers used to separate two-way ramps on left-turn driver sight distances were also investigated by analyzing driver perspectives of roadway information with a threedimensional (3D) simulation and analytical methodology. Conclusively, the current best practice was proven effective in deterring wrong-way driving, and general guidelines for appropriate median barrier lengths on two-way ramps were developed. |
| 出版年： | 2017 |
| 论文唯一标识： | P-72Y2017V143N06007 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/JTEPBS.0000039 |
| 期刊名称： | Journal of Transportation Engineering |
| 拼音刊名(出版物代码)： | P-72 |
| 卷： | 143 |
| 期： | 06 |
| 页码： | 54-60 |
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