Optimal Split of Dedicated and Nondedicated Service for Demand-Responsive Paratransit

Many demand-responsive paratransit agencies in urban, suburban, and rural areas deliver services to their customers through a combination of dedicated and nondedicated service. Providers of dedicated service use vehicles that commonly are owned internally by the lead agencies and are used exclusively for serving their customers. Often nondedicated service is delivered by external service providers (e.g., taxi companies or community transit agencies) to increase cost-effectiveness, cover peak period demand, and provide flexibility in meeting customer needs. The main advantage of operating dedicated service is that the lead agency more completely controls the delivery of service. When compared to nondedicated services, dedicated services may be more reliable because there is increased control of drivers, more stringent control of vehicle maintenance and replacement schedules, and consistent customer service and operating policies. The main advantage of using a combined service structure that includes both dedicated and nondedicated services is its cost-effectiveness in dealing with the inherent daily and seasonal fluctuations of demand. By purchasing supplementary nondedicated services from a third party to cover peak overflow trips or low-demand periods, fewer dedicated vehicles are needed. Currently, decisions on the ratio between the amount of dedicated versus nondedicated service are mostly made by transportation managers on the basis of their experience and judgment. Tools are needed to assist transportation managers in deciding the appropriate ratio between dedicated and nondedicated service in a systematic and comprehensive manner. The objective of this research is to develop tools that can be used by transportation managers to determine the appropriate split between dedicated and nondedicated paratransit services to increase cost-effectiveness and meet peak demand needs.


  • English


  • Status: Completed
  • Funding: $249921.00
  • Contract Numbers:

    Project B-30

  • Sponsor Organizations:

    Federal Transit Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    Transit Cooperative Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC    20001
  • Project Managers:

    Chisholm-Smith, Gwen

  • Performing Organizations:

    Nelson/Nygaard Consulting Associates

  • Principal Investigators:

    Rodman, Will

  • Start Date: 20040901
  • Expected Completion Date: 0
  • Actual Completion Date: 20070401
  • Source Data: RiP Project 10722

Subject/Index Terms

Filing Info

  • Accession Number: 01463063
  • Record Type: Research project
  • Source Agency: Transit Cooperative Research Program
  • Contract Numbers: Project B-30
  • Files: RiP, USDOT
  • Created Date: Jan 3 2013 2:16PM