The report deals with the effects of free play in steering and wheel suspension on vehicle handling, with special attention to the performance of the system driver/vehicle in emergency situations. A field study has been carried out where 33 subjects drove a Volvo 142 and a Saab 99 in both original condition and with certain degradations in steering and wheel suspension. The cars were driven on a test track where the drivers were exposed to two different types of surprise situations where they had to make quick avoidance manoeurvres. The cars were equipped with instruments for the registration of speed, lateral acceleration, and steering wheel movements. After having driven the cars, the drivers made a comparative judgement of the handling characteristics of the cars. The test method used in this study is evaluated and a comparison is made with other methods for testing vehicle characteristics. Based upon the results from the study and from previous studies, a judgement is made regarding the effects of free play in steering and suspension on vehicle handling and traffic safety. Consequently, some general recommendations are given for the judgement of degradations in steering and suspension components in technical inspections of vehicles. /TRRL/


  • Swedish

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 33 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00163810
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • Report/Paper Numbers: VTI-Report NO 109 Monograph
  • Files: ITRD, TRIS
  • Created Date: Dec 27 1977 12:00AM