EVALUATION OF CRITERIA FOR TRUCK AIR BRAKE ADJUSTMENT. INTERIM REPORT. VOLUME 1

This report presents analyses, findings and recommendations concerning the out-of-service (OOS) brake adjustment criteria in the Federal Motor Carrier Safety Regulations and the North American Uniform Driver-Vehicle Inspection Criteria for heavy trucks. The study involved interviews with MCSAP inspectors, reviews of recent studies of the influence of brake adjustment and preparation of documents on pertinent mechanical properties of S-cam brakes, mechanical analyses of stopping capability, statistical analyses of inspection data, and combined mechanical and statistical analyses for evaluating OOS criteria using detailed inspection data.

• Supplemental Notes:
  • FHWA contract manager (COTR): Robert Hagan. Acknowledgements to Messrs. Heusser, Rogers, and Harris of NTSB and the MCSAP inspectors who provided information.
• Corporate Authors:

  University of Michigan Transportation Research Institute

  2901 Baxter Road
  Ann Arbor, MI  United States  48109-2150
• Authors:
  • Fancher, P
  • Campbell, K
  • Bareket, Z
  • Blower, D
  • Masters, R
• Publication Date: 1991-10

Media Info

• Pagination: 46 p.

Subject/Index Terms

• TRT Terms: Air brakes; Brakes; Braking; Braking performance; Trucks
• Old TRIS Terms: Slack adjustment; Truck brakes
• Subject Areas: Highways; Motor Carriers; Vehicles and Equipment; I91: Vehicle Design and Safety; I95: Vehicle Inspection;

Filing Info

• Accession Number: 00619115
• Record Type: Publication
• Report/Paper Numbers: UMTRI-91-17-1, HS-041 313
• Contract Numbers: DTFH61-89-C-00106
• Files: HSL, TRIS
• Created Date: Feb 29 1996 12:00AM