Synthesis of Information Related to Highway Practices. Topic 54-13. Truck Escape Ramp Design and Operation
| 项目名称： | Synthesis of Information Related to Highway Practices. Topic 54-13. Truck Escape Ramp Design and Operation |
| 摘要： | Transportation agencies build and operate escape ramps to allow heavy vehicles that cannot maintain safe speeds on steep downgrades to safely exit the highway before losing control and crashing. Escape ramps involve important design choices specific to roadway, terrain, and vehicle characteristics. Some escape ramps use upward-sloping beds of loose aggregate to slow the vehicles, while others employ passive or active mechanical devices such as cables to retard their motion. The use of escape ramps also requires operational choices. Some agencies use intelligent transportation technologies to detect trucks that are exceeding or may soon exceed speeds appropriate for the vehicle and the location, and to warn drivers of the need and means to exit the roadway. Because design and operations practices vary significantly among locations and agencies, no common design standards or recommended practices exist. Brake failures on heavy vehicles descending steep grades often result in serious crashes and fatalities. The objective of this synthesis is to document practices used by state departments of transportation (DOTs) to design and operate facilities to detect, guide, and capture out-of-control vehicles travelling on steep downgrades. |
| 状态： | Active |
| 资金： | 55000 |
| 资助组织： | National Cooperative Highway Research Program；American Association of State Highway and Transportation Officials (AASHTO)；Federal Highway Administration |
| 项目负责人： | Gause, Jo Allen |
| 执行机构： | University of Missouri, Kansas City |
| 主要研究人员： | Brown, Henry |
| 开始时间： | 20220429 |
| 主题领域： | Administration and Management；Design；Highways；Motor Carriers；Operations and Traffic Management；Planning and Forecasting；Safety and Human Factors |
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