MASH TL-3 Development and Evaluation of the Thrie-Beam Bullnose Attenuator
The thrie-beam bullnose system is a non-gating, redirective crash cushion that provides a safe, cost effective, non-proprietary option for shielding median piers and other median hazards. It consists of a guardrail envelope comprised of thrie-beam panels mounted at a height of 803 mm and supported by breakaway steel posts. The nose rail section and the first two adjacent rail sections are radiused and slotted, and the fourth and fifth rail sections are slotted. The combination of the radiused and slotted rail segments along with the breakaway posts allow the system to safely capture and decelerate vehicles impacting near the end or nose of the system, while redirecting vehicles impacting along the side. The barrier system was originally developed and evaluated under National Cooperative Highway Research Program (NCHRP) Report 350.In 2009, the American Association of State Highway and Transportation Officials (AASHTO) implemented an updated standard for the evaluation of roadside hardware. The new standard, the Manual for Assessing Safety Hardware (MASH), improved the criteria for evaluating roadside hardware beyond the previous NCHRP Report 350 standard through updates to test vehicles, test matrices, and impact conditions. A research effort was undertaken to evaluate the thrie-beam bullnose to MASH Test Level 3 through full-scale crash testing and modify the design as needed to meet the revised safety criteria. This paper details the evaluation of the thrie-beam bullnose through MASH TL-3 full-scale crash tests, modification of the original design to meet MASH criteria, and recommendations for implementation of the system.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/9783030798000
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Supplemental Notes:
- © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2022.
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Authors:
- Bielenberg, Robert
- Faller, Ron
- Stolle, Cody
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Conference:
- 18th International Road Federation World Meeting & Exhibition
- Location: Dubai , United Arab Emirates
- Date: 2021-11-7 to 2021-11-10
- Publication Date: 2022-4
Language
- English
Media Info
- Media Type: Web
- Edition: 1
- Features: References;
- Pagination: pp 755-771
- Monograph Title: Advances in Road Infrastructure and Mobility: Proceedings of the 18th International Road Federation World Meeting & Exhibition, Dubai 2021
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Serial:
- Sustainable Civil Infrastructures
- Publisher: Springer Cham
- ISSN: 2366-3405
- Serial URL: https://www.springer.com/series/15140
Subject/Index Terms
- TRT Terms: Crash cushions; Crash tests; Equipment design; Guardrail terminals; Guardrails
- Identifier Terms: AASHTO Manual for Assessing Safety Hardware
- Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors;
Filing Info
- Accession Number: 01870666
- Record Type: Publication
- ISBN: 9783030798000
- Files: TRIS
- Created Date: Jan 24 2023 9:28AM