Midwest guardrail system W-beam-to-thrie-beam transition

Karla A. Polivka, Brian A. Coon, Dean L. Sicking, Ronald K. Faller, Robert W. Bielenberg, John R. Rohde, John D. Reid

Research output: Chapter in Book/Report/Conference proceedingChapter

5 Scopus citations


For longitudinal barriers, it is common practice to use a standard W-beam guardrail along the required highway segments and to use a stiffened time-beam guardrail in a transition region near the end of a bridge. As a result of the differences in rail geometries, a W-beam-to-thrie-beam transition element is typically used to connect and provide continuity between the two rail sections. However, the W-beam-to-thrie-beam transition element has not been evaluated according to current impact safety standards. Therefore, an approach guardrail transition system, including a W-beam-to-thrie-beam transition element, was constructed and crash tested. The transition system was attached to Missouri's thrie-beam and channel bridge railing system.

Original languageEnglish (US)
Title of host publicationHighway Facility Design
Number of pages6
StatePublished - 2007

Publication series

NameTransportation Research Record
ISSN (Print)0361-1981

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanical Engineering

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  • Cite this

    Polivka, K. A., Coon, B. A., Sicking, D. L., Faller, R. K., Bielenberg, R. W., Rohde, J. R., & Reid, J. D. (2007). Midwest guardrail system W-beam-to-thrie-beam transition. In Highway Facility Design (2025 ed., pp. 45-50). (Transportation Research Record; No. 2025). https://doi.org/10.3141/2025-04