VISIBILITY MEASUREMENT

METING VAN ZICHT

METEOROLOGICAL AND INSTRUMENTAL ASPECTS OF MEASURING THE VISIBILITY OF SIGNALISATION AND/OR GUIDANCE SYSTEMS FOR ROAD TRAFFIC ARE DEALT WITH. IT IS HARDLY POSSIBLE TO IMITATE AN AVERAGE OBSERVER, BUT AN INSTRUMENT HAS SOME IMPORTANT ADVANTAGES BECAUSE OF ITS OBJECTIVENESS. EXTINCTION TRANSMISSOMETERS AND WIDE ANGLE SCATTERING INSTRUMENTS ARE MOST SUITABLE FOR MEASURING. IN TRANSLATING THE EXTINCTION VALUE INTO USABLE DATA FROM A TRAFFIC ENGINEERING POINT OF VIEW DIFFERENT FACTORS HAVE TO BE TAKEN INTO ACCOUNT: REPRESENTATIVENESS OF THE MEASUREMENT, AVAILABLE SIGNALLING OR LIGHTING, DIFFERENCES BETWEEN DAY, NIGHT, DUSK, ETC.

  • Corporate Authors:

    Royal Dutch Touring Club ANWB

    Wassenaarseweg 220, P.O. Box 93200
    The Hague,   Netherlands 
  • Authors:
    • Wessels, HRA
  • Publication Date: 1974-5

Language

  • Dutch

Media Info

  • Features: Figures; Photos; Tables;
  • Pagination: p. 230-233
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00080679
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Mar 6 1975 12:00AM