Determination of Freeway Acceleration Lane Length for Smooth and Safe Truck Merging
| 项目名称： | Determination of Freeway Acceleration Lane Length for Smooth and Safe Truck Merging |
| 摘要： | In the U.S., over 70% of the freight tonnage is moved by large trucks. Roadway design must accommodate large trucks to ensure the efficiency of freight transportation. The purpose of this research is to develop an analytical model to estimate the length of freeway acceleration lane to ensure large trucks can merge into freeway smoothly and safely. To achieve this goal, this research will first summarize current design guidelines on freeway acceleration lane length, with focus on those considering large trucks. Then, an analytical model will be developed for estimating the length of freeway acceleration lanes at freeway on-ramps according to the merging distances required by the large trucks. This model will consider both the acceleration and gap searching needs of merging trucks. Field studies at selected on-ramp locations will be conducted to collect data for developing and validating the model. After that, a model for estimating the required freeway acceleration length for large trucks will be provided, and the adequate acceleration lengths under different traffic conditions will be recommended according to the modeling results. The results of this research will help complement the current federal and state design guidelines on freeway acceleration lane length by considering the unique characteristics of large trucks. |
| 状态： | Completed |
| 资金： | 90298 |
| 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： | 20171001 |
| 预计完成日期： | 20190930 |
| 实际结束时间： | 20190930 |
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