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MetCouncil_ABM_Meeting_Notes_2021_06_02

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leah.flake edited this page Jun 15, 2021 · 1 revision

MetCouncil ABM Update Kickoff

  • Introductions

Overview of objective + project management

  • Ben share slides (link?)

  • Build validation target data from survey data

    • Goodness of fit measures for comparing tour mode choice results, etc. to survey
    • Also need traffic counts, highway/transit assignments

  • Iterative rounds -- will compare model results to expective results at each iteration

  • Envisioned phase 2 project is a more comprehensive update

  • Jonathan: Implementing and using the Council's skimming procedures for ABM

    • complicated because finishing work on assignment and networks
    • this has also led MetCouncil to back away from the Cube world & into a more linear/batch scripting setup
    • thinking that ActivitySim will help with this progression
    • General goal is usability and readability all the way through -- especially documentation, etc.

  • Dennis:

    • Like the concept of batch file; using catalogue makes reproducibility more challenging

  • MetCouncil can provide RSG with Cube batch file setup. Might be some mashing together to get everything consistent.

  • Consensus to use GitHub for project management resources

    • Can send link to ActivitySim github to anyone on team who isn't familiar
    • Are there ways to download wiki/documents off of github?
      • Yes, you can clone the wiki
      • Also tools to convert wiki to pdf, etc. which have worked OK
    • Can make repo + wiki public
    • Can put under RSG or MetCouncil's github org...
      • MetCouncil is fine w/ being public. Preference is to use MetCouncil's site.
      • Dennis will create a repo for this -- fork ActivitySim; Ben will send list of names to add

  • Meeting frequency

    • Ben will send out Doodle poll to choose a day for a regular meeting (every 2 weeks)

  • Existing model:

    • Dennis will send link to FTP site plus instructions on which files to use
    • Base year plus 2040 scenario -- will send base year inputs
    • Andrew will run model (MetCouncil will send documentation on how to run)

  • ActivitySim Examples/where to start from:

    • SEMCOG has all ActivitySim improvements from past few months, except transit subsidy + transit pass models (as of now)
    • Same code base as MWCOG (difference is mode choice model, size terms for employment datasets)
    • SEMCOG is probably best starting point. Wait until transit subsidy and transit pass are working with SEMCOG
    • Key differences between example model to start with are synthetic population, land use variables, highway, transit
      • SEMCOG is set up for 3 transit modes (local, premium, local + premium with transfer); walk/PNR/KNR
      • MWCOG has similar but commuter rail broken out
      • MetCouncil has certain transit set up with walk-transit/drive-transit
        • lack of transit nest means it is hard to produce reasonable mode choice results
        • Discuss when closer to setting up transit
        • Not seeing expected mode shift with introduction of premium transit service
        • This might be key spot where we need to do something different -- everything else is fairly transferrable
    • Temporal disaggregation is half hour in current MetCouncil model -- consistent with SEMCOG
      • Doesn't skim or assign 48 periods
    • If there is something incompatible with example setup for arbitrary reasons, MetCouncil is open to changing

  • Survey data processing

    • Process 7,500 hh sample from 2018-2019 TBI for phase 1
    • Most recent OBS is 2016; also have 2016 survey refactored to 2019 ridership
    • Expecting that 2021 might be strange year -- not sure if will combine with 2018-2019 data
    • Land use data:
      • 2018 is latest synthetic population & employment
    • Traffic counts exist; are not joined to the network currently (they are working on it)
      • Existing networks: There are counts but they aren't updated to 2018; are 2015 or before
      • New network is still under development; hoping to have in the next few months
      • Counts are in a shapefile currently
    • Processing multi-day data: Use SPA code version from SANDAG

  • Schedule

    • No key milestones, just want to stick as close to the proposed schedule as possible
    • Goal is to begin phase 2 work in early 2022 (after phase 1 is done)

  • Who is sending what to whom:

    • MetCouncil will send TBI survey files to RSG
    • Dave will send OBS to RSG and MetCouncil
    • Ben sending Doodle poll

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