OPTICAL ALIGNMENT ON ROAD CURVES; AN EMPIRICAL STUDY SHOWING HOW SIGNS INFLUENCE SPEED AND LATERAL VEHICLE POSITIONS

OPTISK LEDNING I VEGKURVER; EN MEPIRISK UNDESOEKELSE AV HVORDAN SKILTER OG OPPMERKING PAAVIRKER FART OG KJOERETOEYPLASSERING

"Ran off the road" accidents amounted to about 15% of all officially reported road traffic accidents with personal injury in Norway in 1973. "Ran off the road" accidents on curves and bends occur in particular when the driver's choice of direction and speed is wrong in relation to the traffic condition and the geometric design of the curve. The reason can be insufficient information about the curve, other vehicles, obstacles in the road, poor knowledge about the vehicle, deficiencies in the vehicle, etc. The aim was to see how optical alignment on curves could be improved. By optical alignment is meant measures yielding visual information to the driver about the design of the road. To compare the effect of those measures retardation and lateral vehicle position have been recorded on four curves in daylight as well as at night. Comparison of the measures is based on the fact that low speed on the curve and a vehicle in position in the middle of the lane give the lowest number of accidents. Typical for all observations was the wide variety of lateral vehicle position through the curves. /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/8271331558
• Corporate Authors:

  Norwegian Institute of Transport Economics

  Gransesvingen 7, P.O. Box 6110, Etterstad
  Oslo,   Norway  N-0602
• Authors:
  • Amundsen, F H
  • Pedersen, T O
• Publication Date: 1976-6

Language

• Norwegian

Media Info

• Features: Figures; References; Tables;
• Pagination: 28 p.
• Serial:
  • Publication of: Institute of Transport Economics, Norway
  • Publisher: Norwegian Institute of Transport Economics
  • ISSN: 827133-155-8

Subject/Index Terms

• TRT Terms: Alignment; Crashes; Curves (Geometry); Driving; Handling characteristics; High risk locations; Highway curves; Highway design; Ran off road crashes; Road markings; Single vehicle crashes; Speed; Traffic crashes; Traffic signs; Vehicles; Visual perception
• Old TRIS Terms: Advance direction sign; Vehicle approach
• ITRD Terms: 1643: Accident; 1057: Air transport network; 2894: Alignment; 2872: Bend (road); 562: Carriageway marking; 5408: Speed; 1646: Vehicle handling
• Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors; Vehicles and Equipment; I82: Accidents and Transport Infrastructure;

Filing Info

• Accession Number: 00172545
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Monograph
• Files: ITRD, TRIS
• Created Date: Jun 28 1978 12:00AM