The existing models for estimating stopping sight distances are based to daytime driving solely, and calculations are carried out separately for horizontal and vertical crest curves, using simple vehicle dynamics. Therefore, it is believed that according to the existing policies, these distances are addressed inadequately. In this paper an effort was made to address the problems and provide some specific data thereupon. The results show that the influence of night visibility to the definition of safe stopping sight distance is crucial. Furthermore, combinations of vertical and horizontal curvature may lead to a significant loss of sight distance, which may be attributed to the fact that the cut slope or other roadside obstacle obstructs sight. The overall resulting shorter sight distances during nighttime driving may lead to considerable unsafe driving conditions. Therefore, design policies should reconsider the issue of safe stopping sight distance at nighttime to include the additional necessary influencing parameters.

  • 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:
    • Apostolopoulou, D
    • Psarianos, B
    • Stamatiadis, N
    • Kasapi, E
  • Conference:
  • Publication Date: 2000-6


  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 400-409

Subject/Index Terms

Filing Info

  • Accession Number: 00794795
  • Record Type: Publication
  • Report/Paper Numbers: FGSV 002/67
  • Files: TRIS
  • Created Date: Jun 27 2000 12:00AM