Evaluating the Performance of Longitudinal Barriers on Curved, Superelevated Roadway Sections PDF Download
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Author:
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 0
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Book Description
Author:
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 0
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Book Description
Author: National Academies of Sciences, Engineering, and Medicine
Publisher:
ISBN: 9780309485784
Category :
Languages : en
Pages :
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Book Description
Author: Malcolm H. Ray
Publisher:
ISBN:
Category : Automobiles
Languages : en
Pages : 172
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Book Description
This synthesis will be of interest to state department of transportation (DOT) roadway design, traffic, structural, maintenance, and research engineers and others concerned with highway safety issues. This synthesis describes the current state of the practice for the use of guardrails and median barriers and their crashworthiness. It includes information about the crashworthiness and typical applications of the most common, permanently installed, nonproprietary guardrail and median barrier systems used in the United States today. A significant amount of detail is included in the text to aid the design, selection, and locating processes for safe and effective guardrails and median barriers. The report presents data obtained from a review of the literature and a survey of state DOTs. The synthesis presents a description of the typical longitudinal barriers in use today, including drawings, the extent of their use, and the most recent testing on each guardrail and barrier system, with particular emphasis on NCHRP Report 230 and 350 requirements. In addition, it discusses the maintenance issues, cost constraints, and common problems with each type of barrier. The synthesis only discusses the crashworthiness of guardrails and median barriers; their transitions and terminals are not discussed.
Author:
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 116
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Book Description
The objective of this study was to evaluate the performance limits of guardrails, median barriers, and embankments for different classes of vehicles and impact conditions. The study consisted of accident data analyses, computer simulation work, measurement of inertial properties of vehicles, full-scale crash tests of longitudinal barriers, and full-scale embankment traversal tests.
Author: Hampton Clay Gabler
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 108
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Book Description
TRB's National Cooperative Highway Research Program (NCHRP) Report 656: Criteria for Restoration of Longitudinal Barriers explores the identification of levels of damage and deterioration to longitudinal barriers that require repairs to restore operational performance.
Author: Malcolm H. Ray
Publisher: Transportation Research Board National Research
ISBN:
Category : Nature
Languages : en
Pages : 204
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Book Description
"This is a report on a research agenda to better inform future societal decisions on ocean CDR [carbon dioxide removal]; the Committee is not advocating either for or against possible future ocean CDR deployments, and the Committee recognizes that ocean CDR would, at best, complement the role of climate mitigation approaches including decarbonization"--Page viii.
Author: Maurice E. Bronstad
Publisher: Transportation Research Board National Research
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 180
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Book Description
Author: United States. National Transportation Safety Board
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 48
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Book Description
Traffic barriers are roadside hardware of various designs and materials which are intended to protect vehicles from such off-the-road hazards as trees, embankments, ravines, signposts, bridge support pillars or abutments, or other hazards. The National Transportation Safety Board (NTSB) has been concerned with the problem of inadequate traffic barriers for several years. The Safety Board has investigated accidents in which barriers failed, and has made recommendations to the FHWA. Of primary importance among these have been recommendations that the FHWA develop and promulgate mandatory performance standards for traffic barriers. The purpose of such standards would be to require that traffic barrier types be crash-tested to demonstrate their ability to meet a set of established safety criteria. At present, barriers are not required to meet such criteria through crash-testing. The purpose of this report is to review past Safety Board concerns regarding the adequacy of bridge and highway rail systems and to evaluate the FHWA's efforts to develop safer traffic barriers. This study analyzes the results of recent crash-testing sponsored by the FHWA and makes recommendations concerning performance standards for traffic barriers.
Author:
Publisher:
ISBN:
Category : Electronic book
Languages : en
Pages :
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Author: Chiara Silvestri Dobrovolny
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 0
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Book Description
The purpose of the tests reported herein was to assess the performance of the damaged portable concrete barrier according to the safety-performance evaluation guidelines included in the American Association of State Highway and Transportation Officials Manual for Assessing Safety Hardware (MASH), Second Edition. The crash tests were performed in accordance with MASH Test 3-11, which involves a 2270P vehicle weighing 5000 lb impacting the longitudinal barrier while traveling at 62 mi/h and 25 degrees. This report provides details on the damaged portable concrete barriers, the crash tests and results, and the performance assessment of the damaged portable concrete barriers for MASH Test Level 3 (TL-3) longitudinal barrier evaluation criteria. The damaged portable concrete barriers met the performance criteria for MASH TL-3 longitudinal barriers.
