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Exploring Activity-Based Models and ACS Data Products: Insights and Practical Considerations

This presentation provides a comprehensive overview of primary data products related to activity-based models, highlighting key data needs for emerging models. It explores the advantages and disadvantages of American Community Survey (ACS) data products, and examines various census microdata sources including the Decennial Census PUMS and ACS PUMS. Additionally, it discusses population synthesis methodologies, practical issues in geographic resolution, and the integration of diverse data sources for effective modeling. Research needs and considerations regarding household characteristics and variables affecting ACS data are also addressed.

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Exploring Activity-Based Models and ACS Data Products: Insights and Practical Considerations

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  1. Activity-Based Models and ACS Data D. Niemeier University of Califonia, Davis

  2. Introduction • Overview of primary data products • Overview of activity-based models • Key data needs for emerging models • Advantages and disadvantages of ACS

  3. Primary Data Products • Census Microdata Sources • Decennial Census PUMS • ACS PUMS • Census STF3A (SF3, 2000) • CTPP • NHTS • ACS Tables

  4. Current Practice

  5. Activity-Based Models • In general, key step in which census or “other than travel survey” data plays a role: • Generation of synthetic households/population • TAZ using socio-economic variables (PUMS) • Other steps similar for both 4-step and activity-based (e.g., calibration/validation)

  6. Population Synthesis MORPC Pop. Synthesis Model

  7. Advan/Disadv for Emerging Models

  8. Practical Issues/Research Needed • Geographic resolution • How to map between or fuse data sources • Need for demog. data at HH and person-level • ACS defining HH characteristics may not match census information • Finally, more research and information on control variables, use and affect within ACS

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