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/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1977/626/626.pdf
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=EFFECT+OF+AUTOMATIC+VEHICLE+MONITORING+ERROR+ON+TRANSIT+SCHEDULE+ADHERENCE+MONITORING&author=P.+Bruce&author=J.+Ludwick&author=G.+Swetnam&publication_year=1977
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Bus Transit Systems. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Bruce, P
  • Ludwick, J S
  • Swetnam Jr, G F
• Conference:
  • 56th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1977-1-24 to 1977-1-28
• Publication Date: 1977

Media Info

• Media Type: Digital/other
• Features: Figures; References;
• Pagination: pp 1-6
• Monograph Title: Bus service planning
• Serial:
  • Transportation Research Record
  • Issue Number: 626
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Accuracy; Automatic vehicle monitoring; Bus transportation; Errors; Mathematical models; Safety; Scheduling
• Subject Areas: Highways; Motor Carriers; Operations and Traffic Management; Public Transportation; Safety and Human Factors;

Filing Info

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