WET-WEATHER HIGH-HAZARD LOCATIONS IDENTIFICATION AND EVALUATION

Emphasis is on field testing and examination of selected wet-weather accident sites. A summary of work performed in 1976 and 1977 is included. A study was made of the relationships between texture and speed gradients, and between texture and skid numbers. Correlations were quite poor in both cases. Bold-tire values over areas tested in 1978 were generally below 25 with ribbed tire numbers reaching as high as 50. Hydroplaning accidents were usually associated with bald-tire values below the low twenties. An open-graded friction course showed skid numbers in the high thirties with no reported hydroplaning accidents. An inventory test of 30 miles of Route 15 demonstrated good correlation between accident experience and areas of low bald-tire skid resistance. Correlation with ribbed-tire values was very poor. Recommendations are made for an expanded bald-tire inventory program and the periodic monitoring of accident data on the open-graded friction course. (FHWA)

Media Info

  • Pagination: 102 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00311350
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-CT-79-4 Final Rpt.
  • Contract Numbers: 403
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Jun 26 1980 12:00AM