Determine Adequacy of Installation of Existing Roadside Barriers on High-Speed Roadways
| 项目名称： | Determine Adequacy of Installation of Existing Roadside Barriers on High-Speed Roadways |
| 摘要： | The American Association of State Highway and Transportation Official (AASHTO) Manual for Assessing Safety Hardware (MASH) specifies the highest impact speed for crash testing of barrier systems with passenger vehicles is 62 mph, which was derived from analyses of reconstructed crash data nearly 20 years old. Preliminary data from National Cooperative Highway Research Program (NCHRP) Project 17-43, Long-Term Roadside Crash Data Collection Program under which a new database of reconstructed run-off-road crashes is being developed, indicates that for highways with a posted speed limit greater than 70 mph, the 85th percentile impact speed is 67.7 mph. This represents a need for a higher design impact speed for barriers used on these higher speed roadways. Increased impact speeds will place more demand on barrier systems. There have been observations of guardrail systems developing partial rail tears when tested under MASH impact conditions, indicating that these systems are near their containment capacity. The Receiving Agency has a significant mileage of roadways with posted speeds of 75 miles per hour (mph) and greater. The Performing Agency shall assess performance limits of identified commonly used barrier systems for higher impact speeds using engineering analysis and finite element (FE) simulations and provide with design guidance for selection and installation of such barriers at higher posted speed limit highways, while maintaining MASH compliance. |
| 状态： | Active |
| 资金： | 269,998 |
| 资助组织： | Texas Department of Transportation |
| 项目负责人： | Odell, Wade |
| 执行机构： | Texas A&M Transportation Institute |
| 开始时间： | 20210901 |
| 预计完成日期： | 20230831 |
| 主题领域： | Operations and Traffic Management；Safety and Human Factors |
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