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Rescheduling/timetable optimization of trains along the U.S. shared-use corridors : development of the hybrid optimization of train schedules (HOTS) model.

Filetype[PDF-3.43 MB]


  • English
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    • Creators:
    • Corporate Creators:
      National University Rail Center (U.S.)
    • Subject/TRT Terms:
    • Publication/ Report Number:
      NURAIL2013-MTU-R07
    • Resource Type:
      Tech Report
    • Geographical Coverage:
      United States
    • Corporate Publisher:
      National University Rail Center (U.S.)
    • Abstract:
      A growing demand for passenger and freight transportation, combined with limited capital to expand

      the United States (U.S.) rail infrastructure, are creating pressure for a more efficient use of the current

      line capacity. This is further exacerbated by the fact that most passenger rail services operate on

      corridors that are shared with freight traffic. Tools and methodologies for capacity analysis are one

      approach to investigate the situation. As the U.S. continues to develop higher speed passenger services

      with similar characteristics to those in European shared-use lines, understanding how such analysis are

      done in both continents grows in relevance. A detailed investigation was done to understand how each

      continent approaches capacity analysis, and whether any benefits could be gained from crosspollination.

      It was found that there was no major divergence between approaches or criteria used for

      capacity. However, there are differences in the tools used in these two regions, as the tool designs

      follow the main operational philosophy of each region (timetable based in Europe vs. non-timetable

      based in the U.S.).

      Timetable management is one of the operational methodologies commonly applied in the highly

      structured European rail system to improve the capacity utilization while maintaining acceptable level

      of service (LOS) parameters. The potential benefits of using similar methodologies to benefit the less

      structured U.S. system were studied in this research. A Hybrid Simulation approach was developed as

      part of the research to investigate the use of timetable management features and to analyze the tradeoff

      between LOS parameters and capacity utilization in the U.S. In the method, the output from Rail

      Traffic Controller (RTC), a simulation tool commonly used in the U.S., was used as an input for

      timetable compression by RailSys (a simulation tool developed in Europe).

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