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 constitutes 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.

  • Corporate Authors:

    University of Michigan, Ann Arbor

    Highway Safety Research Institute
    Ann Arbor, MI  USA 

    National Highway Traffic Safety Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Ervin, R D
    • Campbell, J D
    • Sayers, M
    • Bunch, H
  • Publication Date: 1978-3

Media Info

  • Pagination: 30 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00181954
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: UM-HSRI-78-12-1, DOT-HS-803-457
  • Contract Numbers: DOT-HS-6-01368
  • Files: NTIS, USDOT
  • Created Date: Nov 14 2002 12:00AM