GLARE ON MOTORWAYS

THE STUDY HAS BEEN CONCERNED MAINLY WITH THE VISUAL DISTANCES WHEN DRIVERS ON MOTORWAY ARE SUBJECT TO GLARE FROM CAR HEADLIGHTS. A MATHEMATICAL MODEL WHICH ALLOWS THE CALCULATION OF VISUAL DISTANCES UNDER GLARE FROM ONCOMING VEHICLES HAS BEEN DEVELOPED AND TESTED BY LYSTEKNISK LABORATORIUM. A DETAILED DESCRIPTION OF THIS PART OF THE STUDY IS GIVEN IN PART II (IN ENGLISH). SOME PRACTICAL CONSEQUENCES FOR DANISH DESIGN STANDARDS OF THIS STUDY ARE OUTLINED IN PART I (IN DANISH). VISUAL DISTANCES ARE CALCULATED FOR DIFFERENT MEDIAN WIDTHS AND HIGHWAY CURVATURE AND FOR TWO TYPICAL EXAMPLES OF HORIZONTAL REVERSED CURVATURE WITH A 12 M MEDIAN WIDTH. IT IS CONCLUDED THAT EVEN WHEN THE MEDIAN WIDTH IS 12 M, ONCOMING VEHICLES MUST USE DIMMED HEADLIGHTS AT LEAST IN CURVES, UNLESS SOME SORT OF A GLARE FENCE IS SET UP IN THE CENTRAL RESERVE. /HSRI/

• Corporate Authors:

  Radet Trafiksikkerhedsforskning /Den

  ,    
• Authors:
  • Frederiksen, E
  • Jorgensen, N O
• Publication Date: 1972

Media Info

• Features: Photos; References; Tables;
• Pagination: 78 p.

Subject/Index Terms

• TRT Terms: Curvature; Glare; Headlamps; Mathematical models; Medians; Radius; Sight distance; Width
• Old TRIS Terms: Radius of curvature
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00221876
• Record Type: Publication
• Source Agency: Highway Safety Research Institute
• Files: TRIS
• Created Date: Apr 8 1973 12:00AM