Seven alternatives to the illuminated yellow bollard, model 62, commonly placed on traffic islands in built-up areas, have been investigated with respect to several information-processing aspects relevant to drivers, in comparison with the bollard at present used in the Netherlands. Each alternative was evaluated on the following aspects: its conspicuity in darkness; its capacity to compel the driver to adjust his course so as to avoid coming into contact with the traffic island; the degree to which it permits a correct assessment of the position of the traffic island within the environment; the degree to which it obstructs the view on pedestrians making use of the island to cross the street; its resistance against glare caused by the headlamps of vehicles coming from the opposite direction. The results of the field study proved to be of insufficient reliability, the degree of concordance among the observers being no more than moderate. The results of the laboratory study were distinctly in favor of the alternatives comprising a yellow pole plus arrow-sign. These were the most conspicuous of the set of alternatives, and not less than the others in terms on compelling capacity. No differentiation between these two alternatives was obtained. Consideration of technical aspects and cost, in addition, does not change the final conclusion that the alternatives comprising a yellow pole have preference. (TRRL)

  • Corporate Authors:

    Studiecentrum Verkeerstechniek

    P.O. Box 163
    Driebergen-rijssenbe,   Netherlands 
  • Publication Date: 1984-11


  • Dutch

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 46 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00396166
  • Record Type: Publication
  • Source Agency: Institute for Road Safety Research, SWOV
  • Files: ITRD, TRIS
  • Created Date: Jan 31 1986 12:00AM