Criteria have been published identifying embankments that need guardrail protection. Some of the criteria, related to embankment severity, were based on output from the Texas Transportation Institute's version of the highway-vehicle- object simulation model (HVOSM). Because HVOSM had not been validated for embankments with relatively steep side slopes and because implementation of the criteria would require changes in current Texas Highway Department design procedures, a limited validation study was undertaken. Six full-scale automobile tests were conducted on an embankment of an in-service roadway. The embankment has a side slope of approximately 3.5:1 and a flat-bottom ditch approximately 20 ft below the roadway. The grassy slope, ditch bottom, and back slope were well compacted. A wide variety of encroachment conditions were obtained in the six tests. In addition, suspension failures and, in one case, an attempt to steer back on the side slope created special test conditions. This range of test conditions encompasses many of the conditions that occur in run-off- the-road accidents. Each test was simulated by the HVOSM, and the results were then compared with the measured test results. Three basic types of data were compared: vertical accelerations, vehicle paths, and vehicle attitudes.

Media Info

  • Media Type: Print
  • Pagination: pp 53-63
  • Monograph Title: Safety appurtenances
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00272033
  • Record Type: Publication
  • ISBN: 0309022746
  • Files: TRIS, TRB
  • Created Date: Oct 5 1974 12:00AM