A digital computer program light is used to evaluate the illumination, luminance, and quality of lighting provided by a multi-point lighting system. This program, written in FORTRAN IV, uses four subroutines to determine lighting qualities at every point of a grid superimposed on the road surface. The theoretical background to the calculations is given, and the important road surface characteristics examined. The program is used to evaluate the illumination from a typical lighting system at a two level interchange. The output is shown in a digital form on standard computer sheets; isocurves, road boundaries, masts and lanterns can be drawn on by hand. Several computer designed installations in Australia and Hong Kong are listed. A possible future development mentioned would plot isocurves and road boundaries. /TRRL/

  • Corporate Authors:

    Thomson Publications (Australia) Pty Limited

    47 Chippen Street
    Chippendale, New South Wales 2008,   Australia 
  • Authors:
    • Dluzniak, R
  • Publication Date: 1972-10

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 127-132
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00128706
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Apr 7 1976 12:00AM