CONTROL OF ROAD USER BEHAVIOUR THROUGH ROAD ENVIRONMENT DESIGN. EMPIRICAL STUDIES OF THE PRE-CRASH PHASE AND THE EFFECT OF VARIOUS SAFETY MEASURES IN THE ROAD ENVIRONMENT

The interaction between the main components of the road traffic system, the road user, the vehicle and the road, is examined within a psychological frame of reference described in terms of a general model of road user information processing. A summary is presented of a project aimed at developing and empirically testing a method for multi-disciplinary accident investigation. The collection and analysis of data were based on the information processing model previously mentioned. The method proved capable of producing descriptions of the pre-crash phase in terms of a breakdown in information processing by the road user. Empirical studies of the effect of three types of traffic engineering measures on driver behaviour are presented. A type of speed-reducing hump was tested in three residential areas. The humps proved effective in reducing drivers' choice of speed and the effect was demonstrated to persist over a period of two years. The effect of so-called "rumble strips" was tested in connection with the end of a motorway at a roundabout and on both sides of a temporary motorway approach designed as an S-bend. The effect was measured in terms of the drivers' choice of speeds and acceleration patterns. Both installations proved effective in these two types of action. The third type of measure studied consisted of warning devices used in connection with moving road works zones. The ordinary warning sign was compared with the use of a barrier (2.2 x 2.2 m) on wheels either towed by the vehicle constituting the road works zone or placed 50 m behind the vehicle. The effect of the different devices was measured in terms of the speed and the distance to the roadside chosen by drivers while passing the road works zone. The barrier placed 50 m behind the vehicle was judged to give the best effect on driver behaviour from the traffic safety aspect.

Language

  • Swedish

Media Info

  • Features: Figures; References;
  • Pagination: 55 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00399082
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: VTI Rapport 288, HS-038 789
  • Files: HSL, TRIS, USDOT
  • Created Date: Sep 30 1985 12:00AM