IMPROVED PASSENGER CAR BRAKING PERFORMANCE

Test conditions were studied as candidates for extending the scope of the stopping distance requirements of FMVSS 105-75, "Hydraulic Brake Systems." Conditions of interest included low and split friction surfaces as well as straight-line braking and braking-in-a-turn maneuvers. Two large test programs were conducted and various analytical efforts were applied to the examination of the candidate test conditions and methods. Throughout all of the study activities, only stopping distance performance was taken as the measure for evaluating the utility of the candidate conditions and methods. It was concluded that only the low friction, straight-line braking condition constitute a viable extension of the stopping requirements of 105-75. It was also found that stopping distances in a turn do not differ significantly from stopping distances measured in straight-line braking. Further, stopping distances on split friction surfaces do not appear generally useful as characterizations of vehicle safety quality. /UMTA/

• Corporate Authors:

  Highway Safety Research Institute

  Huron Parkway and Baxter Road
  Ann Arbor, MI  United States  48109
• Authors:
  • Ervin, R D
  • Campbell, J D
  • Sayers, M
  • Bunch, H M
• Publication Date: 1978-3

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: n.p.

Subject/Index Terms

• TRT Terms: Automobiles; Braking; Friction brakes; Hydraulic brakes; Stopping distances
• Old TRIS Terms: Friction braking
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00184574
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: DOT-HS-803-457 Summ Rpt., DOT-HS-803-458 Tech. Rpt., Dot-HS-803-459 Final Rpt.
• Contract Numbers: DOT-HS-6-01368
• Files: TRIS, USDOT
• Created Date: Feb 3 1979 12:00AM