Development of Guidelines for Implementation of Contraflow Left-Turn Lanes at Signalized Intersections
| 项目名称： | Development of Guidelines for Implementation of Contraflow Left-Turn Lanes at Signalized Intersections |
| 摘要： | Recently, an innovative intersection design, contraflow left-turn lane (CLL) design has been increasingly implemented at the signalized intersections in China. It was designed for solving the problem that the capacity of the existing regular left-turn (LT) lanes is insufficient for the increasing left-turn demand at a signalized intersection. The basic idea of this design is to provide additional capacity to left-turning vehicles by making use of the opposing lanes dynamically. With the CLL design, more existing lanes (i.e. opposing through lanes) can be used for moving left-turn vehicles, thereby increasing the efficiency and capacity of the intersections and reducing the left-turn queue lengths at the intersections. In addition, this new design can be easily implemented without modifying the intersection in a way that requires major constructions. To introduce this cost-effective new design to the transportation practitioners in USA, the proposed study will systematically analyze the impacts of CLL on the intersection operational performance and will develop a model for estimating the length of the CLL that will maximize the operational benefits of this new design. In addition, traffic simulation based study will be conducted to valid the modeling results. After that, a step by step design procedure for converting an existing conventional LT intersection to a CLL will be developed. The outcome of the project will provide tools and design guidelines to the traffic engineers for appropriately implementing of this innovative intersection design in USA in the future. |
| 状态： | Active |
| 资金： | 80951 |
| 资助组织： | Office of the Assistant Secretary for Research and Technology |
| 管理组织： | University of North Carolina, Charlotte |
| 项目负责人： | Fan, Wei (David) |
| 执行机构： | Texas Southern University, Houston |
| 主要研究人员： | Qi, Yi |
| 开始时间： | 20181001 |
| 预计完成日期： | 20200930 |
| 实际结束时间： | 0 |
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