TRAFFIC CONTROL DEVICES FOR BLACKOUT DRIVING

ONLY VEHICLES EQUIPPED WITH BLACKOUT LIGHTS ARE PERMITTED TO OPERATE DURING BLACKOUTS. DURING THESE PERIODS, SPECIAL DEVICES ARE NEEDED TO REGULATE, WARN, AND GUIDE DRIVERS OF THESE VEHICLES. THE EFFECTIVENESS OF VARIOUS TRAFFIC SIGNS AND MARKINGS WAS TESTED DURING ACTUAL BLACKOUT CONDITIONS. CONCLUSIONS INDICATE THAT TRAFFIC SIGN DESIGN AND INSTALLATION SHOULD MEET THE FOLLOWING SPECIFICATIONS: (1) THEY SHOULD BE REFLECTORIZED WITH EITHER REFLECTIVE MATERIAL OR REFLECTIVE BUTTONS; (2) THEY SHOULD BE MOUNTED LOW; (3) THEY SHOULD BE AS CLOSE TO THE PAVEMENT AS POSSIBLE; (4) WHEN THE SIGN CANNOT BE MOUNTED LOW ENOUGH TO FALL WITHIN THE BLACKOUT BEAM, IT MAY BE EITHER EXTERNALLY OR INTERNALLY ILLUMINATED; (5) SIGNS SHOULD BE ERECTED AS NEARLY PERPENDICULAR WITH THE LINE OF SIGHT OF THE OBSERVER AS POSSIBLE; (6) COLORS OF BLACK SIGNS ARE NOT SO IMPORTANT AS CONTRAST, AND A BLACK AND WHITE COMBINATION IS SUFFICIENT FOR ALL SIGNS. CONCLUSIONS ON PAVEMENT MARKINGS INCLUDE: (1) VISIBLE CENTERLINES ARE ESSENTIAL; (2) REFLECTORIZED WHITE CENTERLINES ARE VERY EFFECTIVE; (3) DASHED LINES ARE NOT SO EFFECTIVE AS CONTININOUS LINES, AND YELLOW NOT SO EFFECTIVE AS WHITE, ALTHOUGH ALL ARE ADEQUATE; (4) EDGE LINES ARE HELPFUL, BUT UNNECESSARY; (5) CURBS AND OBJECTS WITHIN THE DIRECT LINE OF TRAFFIC MUST BE MARKED.

  • Supplemental Notes:
    • Vol 22, pp 350-361, 11 FIG
  • Authors:
    • Fisher, G J
    • Malcolm, W L
    • Gibson, W E
    • Conner, C N
  • Publication Date: 1943

Media Info

  • Monograph Title: Proceedings of the Twenty-Second Annual Meeting of the Highway Research Board Held at Hotel Statler, St. Louis, Missouri December 1-4, 1942
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00225977
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jun 29 1971 12:00AM