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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

Activity-Based Models and ACS Data

D. Niemeier

University of Califonia, Davis

introduction
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
Primary Data Products
  • Census Microdata Sources
    • Decennial Census PUMS
    • ACS PUMS
  • Census STF3A (SF3, 2000)
  • CTPP
  • NHTS
  • ACS Tables
activity based models
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)
population synthesis
Population Synthesis

MORPC Pop. Synthesis Model

practical issues research needed
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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