FOG WARNING: A STEP TOWARDS AUTOMATION IN ACCIDENT PREVENTION

FOG WARNING SYSTEMS SO FAR INSTALLED IN BRITAIN HAVE PROVED OF LIMITED VALUE BECAUSE MOTORISTS HAVE FOUND THE ARRANGEMENTS UNDER WHICH THESE ARE SWITCHED ON TO BE UNRELIABLE. THE LIGHT OBSCURATION CAUSED BY FOG AT BRITISH AIRPORTS IS MEASURED AT THREE POINTS ALONG THE RUNWAYS USING SPECIAL TRANSMISSOMETERS. THE AMBIENT LIGHT IS ALSO MEASURED USING A BACKGROUND LUMINANCE MONITOR. THE TRANSMISSOMETER IS NOT ONLY HIGHLY ACCURATE INITIALLY BY MAINTAINS ITS ACCURACY OVER A LONG PERIOD OF TIME WITHOUT REQUIRING CONSTANT CLEANING. SPECIAL HOUSING INSURES THAT THE INSTRUMENT WILL REMAIN OPERATIVE UNDER THE MOST SEVERE WEATHER CONDITIONS. THE TRANSMISSOMETER HAS BEEN USED WITH DRAMATIC REDUCTION OF ACCIDENTS ON THE AACHEN-COLOGNE AUTOBAHN NEAR A PLANT PRODUCING A SEVERE AND LOCALIZED FOG. /AUTHOR/

• Supplemental Notes:
  • Vol 49, No 588, PP 430-431
• Authors:
  • Michaelis, E E
• Publication Date: 1971-12

Media Info

• Serial:
  • Roads & Road Construction, London /UK/
  • Volume: 49
  • Issue Number: 588

Subject/Index Terms

• TRT Terms: Detectors; Fog; Measuring instruments; Prevention; Safety; Warning systems
• Subject Areas: Highways; Safety and Human Factors; Security and Emergencies;

Filing Info

• Accession Number: 00221573
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 10 1972 12:00AM