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Activity-Based Modeling

Activity-Based Modeling. How does it work?. CT-RAMP model. Coordinated Travel – Regional Activity Based Modeling Platform (CT-RAMP) for the Atlanta Region Basic Model Design and Linkage between Sub-Models. Role of Population Synthesis (TMIP 5.8).

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Activity-Based Modeling

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  1. Activity-Based Modeling How does it work?

  2. CT-RAMP model Coordinated Travel – Regional Activity Based Modeling Platform (CT-RAMP) for the Atlanta Region Basic Model Design and Linkage between Sub-Models ABM: How?

  3. Role of Population Synthesis(TMIP 5.8) ABM: How?

  4. Where does population synthesis fit in? (TMIP 5.9) ABM: How?

  5. Relations between activity model design elements(TMIP 5.10) ABM: How?

  6. Role of Person Types(TMIP 5.11) ABM: How?

  7. Bridge Expansion Example(TMIP 5.12) ABM: How?

  8. Relevance to Population Synthesizer(TMIP 5.13) ABM: How?

  9. What does a synthetic pop. look like?(TMIP 5.14) ABM: How?

  10. Steps in Creating a Synthetic Pop.(TMIP 5.15) ABM: How?

  11. Pop. Synthesis – Summary View(TMIP 5.16) ABM: How?

  12. Specifying a Target Distribution(TMIP 5.18) ABM: How?

  13. Specifying Control Attributes (1)(TMP 5.21) ABM: How?

  14. Specifying Control Attributes (2)(TMP 5.23) ABM: How?

  15. Uncontrolled Attributes(TMIP 5.24) ABM: How?

  16. Pop. Synthesis Process(TMIP 5.25) ABM: How?

  17. Creating a Synthetic Population(TMIP 5.26, 5.33) • Control the joint distribution of attributes in a synthetic population. • Draw households from our sample to match multi-dimensional target distribution. • Output a synthetic population consisting of all persons belonging to the households drawn. ABM: How?

  18. Ex: Baltimore Metro Council(TMIP 5.45, 5.46) ABM: How?

  19. Forecasting Future Synthetic Pops.(TMIP 5.57) ABM: How?

  20. Accessibilities(TMIP 6.7) ABM: How?

  21. Defining Accessibility(TMIP 6.9, 6.10) ABM: How?

  22. Dimensions of Accessibility Variables(TMIP 6.15) ABM: How?

  23. Area Type Stratification Variables(TMIP 6.23) ABM: How?

  24. Activity Scheduling(TMIP 6.47) ABM: How?

  25. Accessibility Effects: A Practical Ex.(TMIP 6.92) ABM: How?

  26. Long-Term and Mobility Choice Models(TMIP 7.7) • Longer-term decisions such as buying a car and medium-term decisions such as whether to buy a transit pass or a toll transponder. • They affect travel choices over the course of the year, as well as influencing travel choices on a day-to-day basis. ABM: How?

  27. Bridge Expansion Mobility Effects(TMIP 7.11) ABM: How?

  28. Summary of Mobility Model Decisions(TMIP 7.16) ABM: How?

  29. Mobility Decisions w/in ____ Model(TMIP 7.18, 7.19, 7.20) • Within day pattern models and as long-term choices, or represented in one or the other. • Within the land-use model instead of the travel model. • Within the population synthesizer. These might include auto ownership, driver’s licenses, or people who work at home. Most likely as uncontrolled population attributes. ABM: How?

  30. Ex. of Hierarchical Choice of Workplace(TMIP 7.38) ABM: How?

  31. Long-Term & Mobility Decision Models in PSRC ABM System(TMIP 7.49) ABM: How?

  32. Challenges with New Policies and Technologies(TMIP 7.56) ABM: How?

  33. Activity Pattern Generation(TMIP 8.4) • How individual travel choices are made on given (modeled) (week)day • Individual daily activity pattern (DAP) is a central concept of activity based modeling • Replaces trip generation • Generates activities, tours, and trips with cross-impacts on each other • Litmus test on understanding activity based modeling ABM: How?

  34. Activity Pattern & Tour Generation(TMIP 6.7) ABM: How?

  35. Daily Activity Pattern(TMIP 8.7) • A typology describing a combination of tours made by persons over the course of a day. • Simple form: the number of tours of a particular purpose, such as “1 home-based work tour + 1 home-based social/recreational tour”. • Or, use an over-arching description such as “mandatory” or “discretionary” or “stay home all day.” ABM: How?

  36. Classification of Activities(TMIP 8.8) ABM: How?

  37. Out-of-Home Activities / Travel Purposes (TMIP 8.10) ABM: How?

  38. Why model trips for different purposes jointly? (TMIP 8.16) ABM: How?

  39. Simplified IDAP Choice Ex.(TMIP 8.24) ABM: How?

  40. Daily Activity Patterns(TMIP 8.25) ABM: How?

  41. IAP Exact Number of Stops(TMIP 8.38) ABM: How?

  42. Basic Choice Structure for Coordinated DAP (TMIP 8.48) ABM: How?

  43. Coordinated DAP Type – 3 Persons(TMIP 8.49) ABM: How?

  44. Types of Joint Travel (TMIP 8.66) ABM: How?

  45. Scheduling and Time of Day Choice(TMIP 9.x) ABM: How?

  46. ToD Choice in ABM System (TMIP 9.10) ABM: How?

  47. Limitations of 4-Step w/rtToD Choice(TMIP 9.12) ABM: How?

  48. ToD Principal Modeling Approaches(TMIP 9.15) ABM: How?

  49. Impacts on ToD Choice (TMIP 9.31) ABM: How?

  50. Location & Accessibility Effects(TMIP 9.49) ABM: How?

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