LIGHTING AND FREQUENCY OF ACCIDENTS IN HIGHWAY TUNNELS

BELEUCHTUNG UND UNFALLHAEUFIGKEIT IN STRASSENTUNNELN

IN GENERAL ONE ASSUMES THAT AN INCREASE IN THE LEVEL OF ILLUMINATION LEADS TO A DROP IN ACCIDENTS. IN SPITE OF DETAILED ACCIDENT STUDIES IN 34 SWISS TUNNELS ON MAIN ROADS, THE AUTHOR HAS BEEN UNABLE TO FIND ANY RELATION BETWEEN THE LEVEL OF ILLUMINATION AND THE OCCURRENCE OF ACCIDENTS. A REDUCTION IN ILLUMINATION IN THE CENTRAL SECTION OF TUNNELS HAD NO NEGATIVE EFFECTS. ACCIDENT FREQUENCIES OCCUR IN THE ENTRANCE AND TRANSITION ZONES; LONG TUNNELS HAVE, THEREFORE, A LOWER ACCIDENT RATE THAN SHORTER TUNNELS. IN COMPARISON TO OPEN STRETCHES OF HIGHWAY FEWER ACCIDENTS OCCUR IN TUNNELS. BECAUSE OF THE SHORTER DISTANCES BETWEEN VEHICLES REAR END COLLISIONS ARE MORE FREQUENT IN TUNNELS. COLLISIONS WITH OBJECTS LYING ON THE CARRIAGEWAY, WHICH COULD BE CAUSED BY POOR ILLUMINATION, ARE VERY RARE.

  • Authors:
    • Graf, U
    • GHIELMETTI, M
  • Publication Date: 1978

Language

  • German

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01288920
  • Record Type: Publication
  • Source Agency: Forschungsgesellschaft für Straßen- und Verkehrswesen (FGSV)
  • Files: ITRD
  • Created Date: Nov 21 2010 1:33AM