EFFECT OF AUTOMATIC VEHICLE MONITORING ERROR ON TRANSIT SCHEDULE ADHERENCE MONITORING

The timing accuracy required to support transit company use of an automatic vehicle monitoring system has been analyzed for the function of monitoring schedule adherence. Schedule deviation data from existing bus lines of the Southern California Rapid Transit District (a potential monitoring system user) were combined in a Monte Carlo analysis in which error distributions were chosen to limit the expected error behavior. Curves were obtained relating the percentage of false alarms and missed detections for each case. The monitoring system can be expected to perform satisfactorily with timing errors that meet a 95th percentile accuracy of plus or minus 15 s. However, allowance of an internal safety margin will be required to avoid an excessive number of false alarms. The size of the safety margin will depend on the actual error distribution. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 1-6
  • Monograph Title: Bus service planning
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00167587
  • Record Type: Publication
  • ISBN: 0309026512
  • Files: TRIS, TRB
  • Created Date: Feb 16 1981 12:00AM