Line Capacity Simulator
Download
1 / 21

Line Capacity Simulator - PowerPoint PPT Presentation


Line Capacity Simulator Railway Operations: Issues and Objectives Capacity management Infrastructure planning Timetable preparation Management of day-to-day movement of trains. Objectives of the Simulator Observing effects of making changes to the existing timetable

Related searches for Line Capacity Simulator

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha

Download Presentation

Line Capacity Simulator

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Line Capacity Simulator


Railway Operations: Issues and Objectives

  • Capacity management

  • Infrastructure planning

  • Timetable preparation

  • Management of day-to-day movement of trains.


Objectives of the Simulator

  • Observing effects of making changes to the existing timetable

  • Estimating section capacity

  • Analyzing the effect of introducing extra scheduled trains in the section


Objectives of the Simulator

  • Visualizing the consequences of signal failure and delays of trains.

  • To model and represent different arrival patterns and compositions of traffic on section.

  • Evaluating investment proposals at local level


Objectives of the Simulator

  • To present the impact of changed operational parameters such as

    • Speed of trains

    • Acceleration/Deceleration

    • Loop entry/exit velocities

  • To experiment with different scheduling possibilities based on -

    • Throughput

    • Delays

    • Priorities

    • Due dates lateness

    • Slack in timetables.


  • Capacity Planning

    Line /Section Capacity:

    Number of (standardised) trains that can be run on a given section

    Estimated by

    • Scott’s Formula

    • Master chart preparation

      This can be done only for a static, known traffic scenario


    Current notion of capacity

    The number of trains that can be handled with

    “reasonable” transit time (say, twice the bare

    minimum transit time).

    This accounts for the prevailing traffic mix

    and congestion effects.


    Software

    • Uses Java 2 as development platform.

    • User specified data files are read and station and blocks are modeled accordingly

    • Trains are sorted in the order of their priorities

    • Runs in ‘one train at a time’ or‘complete simulation’ modes


    Station details

    Loop details

    Block details

    Scheduled trains data

    Freight train data

    Simulation parameter data

    Gradient specification data

    Gradient’s effect details

    Signal failure details

    Delay specification data

    Inputs

    In MS Excel or ASCII Text format


    Output

    • Loop /platform occupancies

    • Block occupancies

    • Traversal time of trains (timetabled passenger as well as non-timetabled freight trains); Averages of such times

    • Plot of distance vs. time in the master chart format

    • Velocity profile and signal aspect displays

    • Signal headway


    Algorithm


    Departure Time Based Priority Scheduling of Passenger Trains

    • The train with higher priority is scheduled first

    • If two trains have the same priority

      • Compared for their departure times, for scheduled passenger trains 

      • Compared  for their arrival times, for freight trains

  • Passenger train with earliest departure or freight train with earliest arrival time is scheduled first


  • Preference Based Resource Allocation for Passenger Trains

    • Exploring other possible alternate paths through the station if the preferred loop is not available by passenger train

    • Ensures a much efficient use of available resourcesto facilitate a smooth passage past the section.


    Simulation Output without searching alternate paths


    Simulation Output with searching alternate paths


    Signal Spacing and Headway Analysis on Suburban sections

    • Supports automatic signaling on mainline sections and relevant track and train detail in operation.

    • Study for Central Railway on signal spacing and headway analysis.


    ad
  • Login