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Activity-Based Models and ACS Data

Activity-Based Models and ACS Data. D. Niemeier University of Califonia, Davis. Introduction. Overview of primary data products Overview of activity-based models Key data needs for emerging models Advantages and disadvantages of ACS. Primary Data Products. Census Microdata Sources

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Activity-Based Models and ACS Data

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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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