Defects in current demand-responsive transportation (DRT) technology are examined, and a way in which these defects may be corrected are described. DRT has paid little attention to the economic efficiency of vehicle use, and current technology is unable to provide practical DRT services to a large geographic area where, for example, door-to-door service could be as long as 2 hours. Another weakness is the poor accuracy of current scheduling methods. Technology based on low-cost, highly reliable minicomputers have been developed to assist with scheduling. Adaptive control methodology has also been developed which is based on a management information system (MIS). MIS is an automatic feedback by-product of a computer-assisted scheduling and dispatching system. MIS records operational transit statistics. The MIS also identifies when and where trips begin and end by each zone or reference point in the service area. A second level of control technology that has been programmed is the automated adaptive control process which can precive a problem and reset the controls. This system is useful when heavy demand makes reliance on 15-minute pickup times infeasible. A truly integrated DRT and express bus system in which multiple demand-responsive trips are coordinated with the express bus schedules, requires substantial computerization of the entire bus operation. Computerization of a DRT system is not as previously thought. Typical cost figures generated from the paratransit model and simulation service in Santa Clara County are tabulated. The advent of microprocessor electronics makes the outlook for adaptive DRT computer- controlled systems look better than the current economics indicate.

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  • Supplemental Notes:
    • Presented at the Fifth Annual International Conference on Demand-Responsive Transportation Systems conducted by the TRB, Nov. 11-13, 1974, Oakland, Calif.; and co-sponsored by American Public Transit Association, California DOT, Alameda-Contra Costa Transit, MIT, UMTA and Technology Sharing Program of U.S. DOT. 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.
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    Transportation Research Board

    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Authors:
    • Murphy, Roy E
    • Paisley, Phillip L
    • Siersema, John N
  • Conference:
  • Publication Date: 1975

Media Info

  • Media Type: Digital/other
  • Features: Tables;
  • Pagination: pp 109-112
  • Serial:

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Filing Info

  • Accession Number: 00126182
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Dec 3 1981 12:00AM