TRACK BEHAVIOR AND ACCIDENT OCCURRENCE IN CURVES ON TWO-LANE HIGHWAYS IN RURAL AREAS

In contrast to the common description of driving behavior in curve areas by speeds, this research investigated track behavior. The research inception is based on the consideration that track behavior is more suitable to distinguish unconscious or unintentional failures made by drivers negotiating curves than speed behavior. In this connection: (a) a classification of the driving processes according to the type of the track paths along curves was developed, and six track types were defined and their characteristic features were determined; (b) the frequency of occurring individual track types and their correlations with curve geometry were evaluated; and (c) correlations between track behavior and accidents in curves were examined. For these aims, data were collected for curves on two-lane highways in rural areas in Switzerland (speed limit 80 km/h). The measurements were made with "measuring posts", a tool which is built into regular delineator poles for camouflage. Up to 12 measuring poles were set up along the curved sections. They permit the detection of pass-through-times, driving direction, vehicle lengths, spot speeds as well as distances of the vehicles from the edge of the pavement. For the data analyses an extensive computer program system was compiled, which enables the reconstruction of the track paths (spline interpolation) and their representation on the background of the actual curve situation. The investigation confirmed that in curves different patterns of track paths do exist, and that the frequencies of the individual track types differ considerably from curve to curve. The track types also have very different characteristics. Due to the limited sample size the analyses seem to suggest that relations exist between accident frequency and frequency of certain track types. For an example of a curve with increased accident frequency, it could be proven that also obvious dependencies exist between accident sites and track behavior. The investigation pointed to the importance of collecting additional data on track behavior, particularly as a means for the early recognition of potential dangers in curves.

  • Supplemental Notes:
    • The publisher's German name is Forschungsgesellschaft fur Strassen- und Verkehrswesen (FGSV).
  • Corporate Authors:

    Road and Transportation Research Association

    Postbox 50 13 62
    D-50973 Cologne,   Germany 
  • Authors:
    • Spacek, P
  • Conference:
  • Publication Date: 2000-6

Language

  • English

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 288-298

Subject/Index Terms

Filing Info

  • Accession Number: 00794786
  • Record Type: Publication
  • Report/Paper Numbers: FGSV 002/67
  • Files: TRIS
  • Created Date: Jun 26 2000 12:00AM