Skip to content

Project Meeting 2022.10.06

mnbina edited this page Oct 6, 2022 · 2 revisions

Agenda

  • Constrained mandatory location choice model
  • Disaggregate accessibilities

Presentation

RSG_DissagAcc_SP_consortium_10062022.pptx

Action Items

Meeting Notes

Constrained mandatory location choice model

  • Tests work on Mac and Windows but Github Actions runs on Linux. It doesn’t pass Github Actions because it how multiprocessing works in Linux, RSG is looking into this.
  • Implementation
    • Note that the target threshold is different from size threshold.
  • Results
    • Previous showed SANDAG 2-zone
    • Now showing MTC one zone
    • Run time – simulation method takes about 20 minutes
    • Differences in average distance by iteration is greater in one-zone system because reallocation of simulated workers are moving around TAZs, which are bigger and further apart, versus SANDAG’s 2-zone system where the zones are smaller.
    • Increase in half-tour length has implications in calibration, need to include simulation when calibrating.
  • Methods to adjust input employment data to factor in in-commuting

Disaggregate accessibilities

  • Functioning model working for 1-zone and 2-zone
  • Working on multiprocessing tests but ran into some issues
  • Process is currently broken into two steps: initialize the proto population and then to compute disaggregate accessibilities
  • Merging step is a recent recently completed task, involves a one-to-many join where user specifies the columns/fields to join
  • Potential issue of unique household types in full synthetic population that doesn’t exist in the prototype. Nick explored joining something close but requires more user-defined specs. This is something that could be discussed more.
Clone this wiki locally