Project Meeting 2025.06.17

Agenda

• PopulationSim update (RSG)
• Sub-Model Preprocessing Update (RSG)

Technical

PopulationSim (Nick F, David H)

• PopSim had been using an old version of ActivitySim and ORCA--needed modernizing
• Testing to validate results after code changes
• Decoupling
• Bugfixes
• Feature Adds/Enhancements -- Backend CVXPY "integerization", NUMBA, etc.
• Addressed several outstanding issues on GitHub
• Open pull request
• Interest (Suzanne C) in seeing tests on larger regions (larger than CALM example)
  • (Jeff N) Example should be "at scale," using more current Census data
  • Need to identify example tests
• Issue 182 (Feng X) timeout limits have been addressed -- user specifies minutes tolerance
• Jilan C (SEMCOG) had issues with Repop. Feature partially fixed.
• Joe C: pull request may have to wait if CS, WSP do not have resources to complete by 6/30
  • Interest in rolling unaddressed issues into a future task order
• Raises larger issue of having to review many changes at once--could use multiple reviewers

Pre-processors and Annotators (David H)

• Calculate variables you need and add them to tables.
  • Pre-processors run before utility calcs to created needed variables
  • Annotators run after a choice is made, from the results, to be used in outputs and downstream models
• You will find them throughout various model configs referenced in .yaml files
• Not every model has had pre-processors, few have had annotators -- inconsistency in repo
  • Location Choice model example -- several commonly used variables desirable
    • re-indexing function can be used, but hacky implementation with Sharrow
    • added pre-processor flexiblity
• All logit models now have preprocessor settings -- different functions for preprocessor and annotator
  • Alternative Preprocessors -- different for chooser vs. alternative
• Table included in documentation which lists all of the models and indicates preprocessors and annotators
• Now CI testing. Open pull request.
• Jeff N has agreed to review the PR.