Proposing New Speed Limit in Mountainous Areas Considering the Effect of Longitudinal Grades, Vehicle Characteristics, and the Weather Condition
| 项目名称： | Proposing New Speed Limit in Mountainous Areas Considering the Effect of Longitudinal Grades, Vehicle Characteristics, and the Weather Condition |
| 摘要： | The current method of Green book (AASHTO 2011) for assigning design speed (and consequently for speed limit) of roads is based on a point-mass model. Therefore, many effective variables such as longitudinal grades, vehicle characteristics, and weather condition are ignored. This fact creates serious safety problems in mountainous areas since, where these missing parameters are dominant. The condition becomes even worse because many of the mountainous roads were built many years ago based on the old design methods (for example, with the downgrades sharper than 10%). This project seeks to study the effect of different parameters related to geometric features (including the radius of the horizontal curve, superelevation rate, and longitudinal grade), vehicles characteristics (including type, weight, and the braking forces), and the weather condition (including side friction factor, wind speed, and wind direction). This analysis will be conducted using a comprehensive series of TruckSim and CarSim simulation tests on the most hazardous mountainous roads in Wyoming. Afterward, appropriate values of speed limit will be proposed for roads tested in the study. Also, new analytical models will be presented to be practical for the rest of the roads (not considered in the study) based on their geometric features, design vehicle, and weather condition. |
| 状态： | Active |
| 资金： | 162424 |
| 资助组织： | Office of the Assistant Secretary for Research and Technology |
| 管理组织： | Mountain-Plains Consortium |
| 项目负责人： | Kline, Robin |
| 执行机构： | University of Wyoming |
| 主要研究人员： | Ksaibati, Khaled |
| 开始时间： | 20180703 |
| 预计完成日期： | 20220731 |
| 实际结束时间： | 0 |
相关文献
- ACCIDENT RATE ON FEDERAL GERMAN SECTIONS OF MOTORWAY IN MOUNTAINOUS COUNTRY
- Impact of Speed Limit Changes on Urban Streets
- Effects of Operating Speed and Posted Speed Limit in Conjunction with Roadway Geometric Design on Safety Performance for High-Speed Rural Highways and Freeways
- EVALUATION OF OFFICIAL ROAD TRAFFIC ACCIDENT STATISTICS FOR THE PERIOD 1.1.1975 TO 31.12.1979 WITH RESPECT TO OVERALL ACCIDENT TRENDS ON MOTORWAYS AND OTHER ROADS OUTSIDE BUILT UP AREAS
- Development of Longitudinal Barriers for Use on High-Speed Roadways
- Enhancing Driver Safety During Severe Weather Conditions
检索历史
应用推荐
