详情

Placement of Traffic Barriers on Roadside and Median Slopes

项目名称：	Placement of Traffic Barriers on Roadside and Median Slopes
摘要：	In the 1970s, an analysis of barriers placed on slopes indicated that most guardrails do not perform well when placed on 1:6 or steeper slopes. Since that time, the vehicle fleet has changed dramatically, with the popularity of light trucks and sport utility vehicles increasing dramatically. Further, there has been a significant change in the design of roadside barriers in recent decades. High-tension cable barriers are beginning to gain widespread acceptance, and there have been changes to the traditional W-beam barriers. It is unclear how these changes affect the behavior of longitudinal barriers placed on slopes. Information from the National Highway Traffic Safety Administration (NHTSA) Fatality Analysis Reporting System (FARS) database indicates that some cross-median crashes have occurred where median barriers were in place. Further, a full-scale crash test has shown that a passenger vehicle can penetrate a cable barrier on the back-slope of a depressed median. With the dramatic increase in use of barriers in depressed medians, a more detailed study of the performance of barriers in depressed medians is needed to achieve acceptable safety performance. The scope of this study does not include barrier terminals. The objective of this project is to produce comprehensive recommendations for placement of barriers on roadside and median slopes. The guidelines should address all of the common types of barriers used in the United States.
状态：	Completed
资金：	79843.00
资助组织：	Federal Highway Administration<==>American Association of State Highway & Transportation Officials (AASHTO)<==>National Cooperative Highway Research Program
项目负责人：	Derr, B Ray
执行机构：	Texas A&M Research Foundation, College Station
开始时间：	20050801
实际结束时间：	20100612
主题领域：	Highways；Operations and Traffic Management；Safety and Human Factors