Evaluating the Impact Responses of Median Cable Barriers

Apart from presenting effectiveness of cable barriers in reducing injury crashes in Tennessee, this study evaluated the post impact performance of the cable barriers considering posted speed limit, the curvature of the roadway, surface type, vehicle type, shoulder width, the initial run-off lane (lane before running off the road) and offset of installation. The study was based on the fact that despite the use of computer simulation and full-scale crash tests in assessment of cable barrier performance, the actual crash incident cannot be fully represented. Crash reconstruction has been used by some researchers in determination of impact conditions (impact angle and speed) and relates them with the vehicle-cable impact outcomes. Based on that, in-service performance evaluation has been conducted to evaluate vehicle-cable impacts outcomes like vehicle rollover and penetrations. Four vehicle-cable impact responses namely containment, redirection, rollover and penetration to evaluate the performance of the cable barriers were considered. Apart from the descriptive statistics, the paper used Multinomial Logistic regression (MNL) and determined marginal probabilities to model the influence of such attributes to the vehicle-barrier impact responses. The paper determined that reduced cable barrier offset, and involvement of heavy vehicles increases the probability of being involved in rollover and penetration crashes. The model can be used in the identification of sites characteristics attributed to poor cable barrier performance.

  • Supplemental Notes:
    • This paper was sponsored by TRB committee AFB20 Standing Committee on Roadside Safety Design.
  • Corporate Authors:

    Transportation Research Board

    ,    
  • Authors:
    • Ferguson Jr, Dante
    • Chimba, Deo
    • Ruhazwe, Evarist
  • Conference:
  • Date: 2019

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 15p

Subject/Index Terms

Filing Info

  • Accession Number: 01697881
  • Record Type: Publication
  • Report/Paper Numbers: 19-00130
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 7 2018 9:40AM