The results of study of the effects of fog related to traffic are listed, vehicle guidance under low visibility conditions are described, the results of a study of fog frequency are summarized, and the provision of advance motorist information is discussed. Current and future sign control systems are briefly reviewed. Studies have shown that the probability of overdriving increases sharply as the visual distance decreases. Active, passive and signaling visual guidance systems are outlined. Fog frequency data reveals that dense fog occurs on more than 20 days a year in over 60 percent of the areas covered by Weather Bureau Stations. The "flip-type" fog warning sign with flasher and its operation are described. The erection of a series of signs approaching the fog area, edgelines and raised pavement markers for better quidance, and electronic fog detectors including the Transmissometer are described.

  • Supplemental Notes:
    • Proceedings of the twenty-ninth annual Ohio Transportation Engineering Conference, conducted by the Department of Civil Engineering, in cooperation with the Ohio Department of Transportation.
  • Corporate Authors:

    Ohio State University, Columbus

    Department of Civil Engineering
    Hitchcock Hall 470
    Columbus, OH  United States  43210
  • Authors:
    • WRIGHT, W R
  • Publication Date: 1975-4

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00127892
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 21 1976 12:00AM