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Safety Analysis of Access Zone Design for Managed Toll Lanes on Freeways
| 题名： | Safety Analysis of Access Zone Design for Managed Toll Lanes on Freeways |
| 其他题名： | AASHTO.2011.A policy on geometric design of highways and streets.Washington,DC:AASHTO. |
| 正文语种： | 英文 |
| 作者： | Moatz Saad |
| 关键词： | Managed lanes;Access safety;Traffic simulation;Log-linear model;Surrogate safety assessment model (SSAM);Expressway |
| 摘要： | On freeways, managed lanes (MLs) have emerged as an effective dynamic traffic management strategy. MLs have been successfully implemented as an important facility in improving traffic mobility and generating revenue for transportation agencies. In this study, scenarios were built and tested in microsimulation to specify the safest accessibility level and decide on the safe weaving length near access zones. The findings indicated that the conflict rate on MLs was 48％ and 11％ lower than that of general purpose lanes (GPLs) in the peak and the off-peak periods, respectively. A log-linear model was developed with estimation of odds multipliers for the conflict frequency analysis. The results suggested that one accessibility level was the safest option in the 14.5-km (9-mi) corridor. The length of 305 m (1,000 ft) per lane change was shown to be the safest weaving length near access zones. Additionally, a weaving length of 183 m (600 ft) per lane change was not recommended. The findings of this study represent a further step toward improving access design of MLs. |
| 出版年： | 2018 |
| 论文唯一标识： | P-72Y2018V144N11004 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/JTEPBS.0000191 |
| 期刊名称： | Journal of Transportation Engineering |
| 拼音刊名(出版物代码)： | P-72 |
| 卷： | 144 |
| 期： | 11 |
| 页码： | 23-35 |
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