Frabitztown: A Model System from Start to Finish

This part of the tutorial will go over builing a model system from start to finish. Included with this tutorial are the necessary input files that are required to work through the guide and replicate the output demonstrated here. This guide was written for XTMF 1.3 - other versions may not be suitable for use with this tutorial.

The first section of the guide will go over the background of XTMF’s test city, population, network and other miscellaneous data required to build a test model system. The second section will outline the steps required to build the model system from the ground up. Included will be tips and suggestions for efficient usage of XTMF. Lastly, a simple scenario will be used to demonstrate the run process within model systems, and how to utilize their outputs.

This guide requires that the user have access to the Emme software.

• The City of Frabitztown
  • Information
  • Population and Employment
• Required Files and Assumptions
• Creating the Project
• Starting the Frabitztown Model System Construction
  • Basic Travel Demand Model Modules
  • Setting the Input Directory
• Specifying the Zone System
  • Input Files
• Establishing a connection with Emme
• Trip Generation
• Trip Distribution
  • Calculating Friction / Cost
    • Copying Pre-existing Modules into Frabitztown
    • Base Travel Time Calculation
  • Exporting Emme matrices to file.
  • Calculating Cost / Friction Matrix with ODMath
  • Gravity Model
• Mode Choice
• Network Assignment (with Emme)
  • Modules that Iterate
    • Unloading Resources
    • Iterating Assignment
    • Updating Travel Demand
• Extracting Data from Emme
  • Return Transit Boardings
  • Export Traffic Assignments
• Running Frabitztown