RED WARNING TRIANGLES - FUNCTION, DESIGN AND APPLICATION

GEVARENDRIEHEKEN - FUNCTIE, VORMGEVING EN TOEPASSING

Based on an analysis of the conditions under which red warning triangles were used, theoretical standards were established for perceptibility and wind stability of this kind of equipment. A Ministerial Order, operative from January 1967, gave directives regarding the triangles, based on these standards. Perceptibility and wind stability tests were carried out on a number of triangles commercially available in the Netherlands by the Institute for Perception RVO-TNO, and by the Institute for Road Transport Vehicles TNO. Based on the braking distance required at a speed of 120 km/h, the minimum distance at which warning triangles can be recognized was found to be 210 metres. A reflective power greater than 90 cd/sq m per lux is therefore advisable for warning triangles. The standard in West Germany is a minimum of 125 cd/sq m per lux, according to manufacturing facilities. This would appear to be acceptable for the Netherlands. A statistical investigation into the number of collisions with stationary vehicles on the road in the Netherlands is included. / IRRD-IRF/

Language

  • Dutch

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 69 p.
  • Serial:
    • Issue Number: 8

Subject/Index Terms

Filing Info

  • Accession Number: 00261838
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Nov 6 1974 12:00AM