Evaluation of the Midwest Guardrail System stiffness transition with curb

Jennifer D. Schmidt, Scott K. Rosenbaugh, Ron Faller

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A W-beam to thrie beam stiffness transition with a 102-mm (4-in.) tall concrete curb was developed to connect 787-mm (31-in.) tall W-beam guardrail, commonly known as the Midwest Guardrail System (MGS), to a previously developed thrie beam approach guardrail transition system. This upstream stiffness transition was configured with standard steel posts that are commonly used by several state departments of transportation. The toe of a 102-mm (4-in.) tall sloped concrete curb was placed flush with the backside face of the guardrail and extended the length of the transition region. Three full-scale crash tests were conducted according to the Test Level 3 (TL-3) safety standards provided in AASHTO's Manual for Assessing Safety Hardware (MASH). The first test, MASH Test No. 3-20, was deemed a failure due to guardrail rupture. The stiffness transition was modified to include an additional nested W-beam rail segment upstream from the W-beam to thrie beam transition element. MASH Test No. 3-20 was repeated on the modified system, and the 1100C small car was successfully contained and redirected. During MASH Test No. 3-21, a 2270P pickup truck was successfully contained and redirected. Following the crash testing program, the system was deemed acceptable according to the TL-3 safety performance criteria specified in MASH.

Original languageEnglish (US)
Pages (from-to)105-121
Number of pages17
JournalJournal of Transportation Safety and Security
Volume9
Issue number1
DOIs
StatePublished - Jan 2 2017

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Curbs
Stiffness
hardware
evaluation
Hardware
Concretes
Pickups
Trucks
Rails
Railroad cars
Steel
Testing

Keywords

  • crash test
  • guardrail stiffness transition
  • highway safety
  • MASH
  • Midwest Guardrail System
  • roadside appurtenances

ASJC Scopus subject areas

  • Transportation
  • Safety Research

Cite this

Evaluation of the Midwest Guardrail System stiffness transition with curb. / Schmidt, Jennifer D.; Rosenbaugh, Scott K.; Faller, Ron.

In: Journal of Transportation Safety and Security, Vol. 9, No. 1, 02.01.2017, p. 105-121.

Research output: Contribution to journalArticle

Schmidt, Jennifer D. ; Rosenbaugh, Scott K. ; Faller, Ron. / Evaluation of the Midwest Guardrail System stiffness transition with curb. In: Journal of Transportation Safety and Security. 2017 ; Vol. 9, No. 1. pp. 105-121.
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