DETECTION DISTANCE IN DAYLIGHT OF ROOF-MOUNTED EMERGENCY VEHICLE LIGHTS

The distance threshold for visibility in daylight was determined for four flashing incandescent signal systems and for two types of gas discharge tube arrays. The distance threshold was found to be a function of the physical construction of lamp housings and the flash pattern as well as of effective intensity. Certain combinations of internal reflections, glare, and complex flash patterns were found to reduce the overall distance threshold.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/1800052
• Corporate Authors:

  National Safety Council

  425 North Michigan Avenue
  Chicago, IL  United States  60611
• Authors:
  • Muhler, W
  • Berkhout, J
• Publication Date: 1976-6

Media Info

• Features: References;
• Pagination: p. 50-58
• Serial:
  • Journal of Safety Research
  • Volume: 8
  • Issue Number: 2
  • Publisher: Elsevier
  • ISSN: 0022-4375
  • Serial URL: http://www.sciencedirect.com/science/journal/00224375

Subject/Index Terms

• TRT Terms: Flashing traffic signals; Incandescent lamps; Navigation lights; Perception; Roofs; Safety; Sight distance; Signals; Vehicle lighting; Visibility; Visual perception; Warning signs; Warning systems
• Old TRIS Terms: Emergency warning devices; Light signals; Thresholds (Perception)
• Subject Areas: Highways; Railroads; Safety and Human Factors;

Filing Info

• Accession Number: 00156326
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Aug 31 1977 12:00AM