Tests were made of spray generation from a two-axle truck equipped with new spray protectors. The experiments were made on an artificially watered test track at two vehicle speeds and two water depths. The intensity of the spray was measured by special measurement equipment, which in principle is measuring the reduction of light transmission made by the spray in different positions and directions in relation to the vehicle. Nine different spray protector designs were tested, of which one type was a standard Swedish spray protector as stipulated by road safety authorities. Analysis was made of measurements as well as of slides produced from films of the spray generation. The rank order of the spray protectors was essentially independent of the evaluation method that was used. The most efficient spray protector was 30-45% more efficient in reducing spray than the standard Swedish spray protector. The report contains an extensive description and analysis of the measurement and evaluation technique and presents a comprehensive collection of measured spray propagation curves behind the vehicle. An analysis is also made of details in the spray measurements and the consequences of this for some of the spray protectors. On basis of the results some recommendations are made concerning improvements in protector design. /TRRL/

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 75 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00194469
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • Report/Paper Numbers: VTI Report 171A Monograph
  • Files: ITRD, TRIS
  • Created Date: Jun 13 1979 12:00AM