Activity-Based Modeling How does it work?. CT-RAMP model Coordinated Travel – Regional Activity Based Modeling Platform (CT-RAMP) for the Atlanta Region.

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Presentation transcript:

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 05/03/20132ABM: How?

Role of Population Synthesis (TMIP 5.8) 05/03/2013ABM: How?3

Where does population synthesis fit in? (TMIP 5.9) 05/03/2013ABM: How?4

Relations between activity model design elements (TMIP 5.10) 05/03/2013ABM: How?5

Role of Person Types (TMIP 5.11) 05/03/2013ABM: How?6

Bridge Expansion Example (TMIP 5.12) 05/03/2013ABM: How?7

Relevance to Population Synthesizer (TMIP 5.13) 05/03/2013ABM: How?8

What does a synthetic pop. look like? (TMIP 5.14) 05/03/2013ABM: How?9

Steps in Creating a Synthetic Pop. (TMIP 5.15) 05/03/2013ABM: How?10

Pop. Synthesis – Summary View (TMIP 5.16) 05/03/2013ABM: How?11

Specifying a Target Distribution (TMIP 5.18) 05/03/2013ABM: How?12

Specifying Control Attributes (1) (TMP 5.21) 05/03/2013ABM: How?13

Specifying Control Attributes (2) (TMP 5.23) 05/03/2013ABM: How?14

Uncontrolled Attributes (TMIP 5.24) 05/03/2013ABM: How?15

Pop. Synthesis Process (TMIP 5.25) 05/03/2013ABM: How?16

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. 05/03/2013ABM: How?17

Ex: Baltimore Metro Council (TMIP 5.45, 5.46) 05/03/2013ABM: How?18

Forecasting Future Synthetic Pops. (TMIP 5.57) 05/03/2013ABM: How?19

Accessibilities (TMIP 6.7) 05/03/2013ABM: How?20

Defining Accessibility (TMIP 6.9, 6.10) 05/03/2013ABM: How?21

Dimensions of Accessibility Variables (TMIP 6.15) 05/03/2013ABM: How?22

Area Type Stratification Variables (TMIP 6.23) 05/03/2013ABM: How?23

Activity Scheduling (TMIP 6.47) 05/03/2013ABM: How?24

Accessibility Effects: A Practical Ex. (TMIP 6.92) 05/03/2013ABM: How?25

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. 05/03/2013ABM: How?26

Bridge Expansion Mobility Effects (TMIP 7.11) 05/03/2013ABM: How?27

Summary of Mobility Model Decisions (TMIP 7.16) 05/03/2013ABM: How?28

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. 05/03/2013ABM: How?29

Ex. of Hierarchical Choice of Workplace (TMIP 7.38) 05/03/2013ABM: How?30

Long-Term & Mobility Decision Models in PSRC ABM System (TMIP 7.49) 05/03/2013ABM: How?31

Challenges with New Policies and Technologies (TMIP 7.56) 05/03/2013ABM: How?32

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 o Replaces trip generation o Generates activities, tours, and trips with cross- impacts on each other o Litmus test on understanding activity based modeling 05/03/2013ABM: How?33

Activity Pattern & Tour Generation (TMIP 6.7) 05/03/2013ABM: How?34

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.” 05/03/2013ABM: How?35

Classification of Activities (TMIP 8.8) 05/03/2013ABM: How?36

Out-of-Home Activities / Travel Purposes (TMIP 8.10) 05/03/2013ABM: How?37

Why model trips for different purposes jointly? (TMIP 8.16) 05/03/2013ABM: How?38

Simplified IDAP Choice Ex. (TMIP 8.24) 05/03/2013ABM: How?39

Daily Activity Patterns (TMIP 8.25) 05/03/2013ABM: How?40

IAP Exact Number of Stops (TMIP 8.38) 05/03/2013ABM: How?41

Basic Choice Structure for Coordinated DAP (TMIP 8.48) 05/03/2013ABM: How?42

Coordinated DAP Type – 3 Persons (TMIP 8.49) 05/03/2013ABM: How?43

Types of Joint Travel (TMIP 8.66) 05/03/2013ABM: How?44

Scheduling and Time of Day Choice (TMIP 9.x) 05/03/2013ABM: How?45

ToD Choice in ABM System (TMIP 9.10) 05/03/2013ABM: How?46

Limitations of 4-Step w/rt ToD Choice (TMIP 9.12) 05/03/2013ABM: How?47

ToD Principal Modeling Approaches (TMIP 9.15) 05/03/2013ABM: How?48

Impacts on ToD Choice (TMIP 9.31) 05/03/2013ABM: How?49

Location & Accessibility Effects (TMIP 9.49) 05/03/2013ABM: How?50

Time Window Overlap (TMIP 9.54) 05/03/2013ABM: How?51

Summary: ToD Model Application (TMIP 9.82) 05/03/2013ABM: How?52

Forecasting, Performance Measures and Software (TMIP 12.3, 12.7) 05/03/2013ABM: How?53

Iterative Calibration (TMIP 12.11) 05/03/2013ABM: How?54

Equity Analysis (TMIP 12.19) 05/03/2013ABM: How?55

Bicycle and Walk Considerations (TMIP 12.25) 05/03/2013ABM: How?56

Scenario Testing (TMIP 12.26) 05/03/2013ABM: How?57

Parking Pricing Scenarios (TMIP 12.27) 05/03/2013ABM: How?58

Alternatives Analysis with ABMs (TMIP 12.33) 05/03/2013ABM: How?59

Stochastic Variation (TMIP 12.34) 05/03/2013ABM: How?60

Data Visualization Dashboard (TMIP 12.83) 05/03/2013ABM: How?61

Summary (TMIP 12.90) Requires new approaches to data collection, new skill sets, new hardware and software? Disaggregate representation of individuals provides summarization by any available attributes, enabling more sophisticated, higher-resolution analyses of transportation policy and investment alternatives. 05/03/2013ABM: How?62

-end- Activity-Based Modeling How does it work?