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Comparing a Household Activity-Based Model with a Person Activity-Based Model 14th TRB Conference on Transportation Planning Applications May 5-9, 2013,

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Presentation on theme: "Comparing a Household Activity-Based Model with a Person Activity-Based Model 14th TRB Conference on Transportation Planning Applications May 5-9, 2013,"— Presentation transcript:

1 Comparing a Household Activity-Based Model with a Person Activity-Based Model 14th TRB Conference on Transportation Planning Applications May 5-9, 2013, Columbus, Ohio John L Bowman, Mark Bradley, Joe Castiglione, Suzanne Childress, John Gibb, Chris Johnson, Matthew Kitchen, John Long, Maren Outwater

2 Context AB model implementation project at PSRC DaySim software platform Implementing two versions Classic DaySim version simulates separate person days New version simulates coordinated household days with joint travel TRB Planning Apps Conf May 2013Bowman, et al2

3 Survey Percent of Tours by Joint Type TRB Planning Apps Conf May 2013Bowman, et al3

4 Survey Percent of Tours with Joint Travel for each Purpose TRB Planning Apps Conf May 2013Bowman, et al4

5 Research Objective Compare the household version with the person version Design (Common aspects, differences) Operation (run time, simulated outcomes, sensitivity tests) TRB Planning Apps Conf May 2013Bowman, et al5

6 Presentation Objective Compare the household version with the person version Design (Common aspects, differences) Operation (run time, simulated outcomes, sensitivity tests) Describe the household version models in more detail TRB Planning Apps Conf May 2013Bowman, et al6

7 Presentation Objective Compare the household version with the person version Design (Common aspects, differences) Operation (run time, simulated outcomes, sensitivity tests) Describe the household version models in more detail TRB Planning Apps Conf May 2013Bowman, et al7

8 TRB Planning Apps Conf May 2013Bowman, et al8

9 Core functionality via shared code base Run control and distributed processing I/O and data structures (households, travel, spatial, skims) Choice probability calculations and simulation Generation of control and data files for model estimation Time window accounting, shadow pricing and destination sampling TRB Planning Apps Conf May 2013Bowman, et al9

10 Integrated System of Choice Models Activity-Based Models: 1993-2012John L Bowman, Ph.D. (www.JBowman.net) 10 Downward integration Upward integration

11 Presentation Objective Compare the household version with the person version Design (Common aspects, differences) Operation (run time, simulated outcomes, sensitivity tests) Describe the household version models in more detail TRB Planning Apps Conf May 2013Bowman, et al11

12 TRB Planning Apps Conf May 2013Bowman, et al12

13 TRB Planning Apps Conf May 2013Bowman, et al13

14 ChoiceModelRunner Within-Day Components TRB Planning Apps Conf May 2013Bowman, et al14

15 Day Level Models PersonHousehold Person Day Activity Pattern Household Day Pattern Type Person Mandatory Activities Joint Mandatory Half Tours Joint Non-Mandatory Tours Person Day Activity Pattern TRB Planning Apps Conf May 2013Bowman, et al15

16 Tour and Trip Models PersonHousehold Models --Tour destination, mode, timing --Iterative within half tour: --stop generation & purpose --location, mode, timing Simulation sequence --by purpose priority Models --Tour destination, mode, timing --Iterative within half tour: --stop generation & purpose --location, mode, timing Simulation sequence 1. Partially joint half tours 2. Fully joint half tours 3. Person mandatory tours 4. Joint non-mandatory tours 5. Person non-mandatory tours TRB Planning Apps Conf May 2013Bowman, et al16

17 Household version tour & trip models conditioned by… Type of tour (joint half tour, joint tour, etc) Information about participants on tour Joint time windows for joint travel Person’s known participation in joint travel (for individual tours) TRB Planning Apps Conf May 2013Bowman, et al17

18 Presentation Objective Compare the household version with the person version Design (Common aspects, differences) Operation (run time, simulated outcomes, sensitivity tests) Describe the household version models in more detail TRB Planning Apps Conf May 2013Bowman, et al18

19 Household Day Pattern Type (Vovsha & Bradley) Up to three alternative pattern type alternatives per person Mandatory on tour Non-mandatory on tour At home all day Modeled… jointly for up to five persons in household Individually for additional persons TRB Planning Apps Conf May 2013Bowman, et al19

20 Modeling Person Mandatory Activities TRB Planning Apps Conf May 2013Bowman, et al20

21 Joint Mandatory Half Tours Partially joint To work or school locations From Paired (both ways) Fully joint To work or school location From Paired (both ways) TRB Planning Apps Conf May 2013Bowman, et al21

22 Partially Joint Half Tour (To Work and/or School) TRB Planning Apps Conf May 2013Bowman, et al22

23 Partially Joint Half Tour (From Work and/or School) TRB Planning Apps Conf May 2013Bowman, et al23

24 Partially Joint Half Tour (Paired To and From) TRB Planning Apps Conf May 2013Bowman, et al24

25 Fully Joint Half Tour (To Work or School) TRB Planning Apps Conf May 2013Bowman, et al25

26 Fully Joint Half Tour (From Work or School) TRB Planning Apps Conf May 2013Bowman, et al26

27 Fully Joint Half Tour (Paired To and From) TRB Planning Apps Conf May 2013Bowman, et al27

28 Fully Joint Half Tour (Chauffeured To Work or School) TRB Planning Apps Conf May 2013Bowman, et al28

29 Fully Joint Half Tour (Chauffeured From Work or School) TRB Planning Apps Conf May 2013Bowman, et al29

30 Fully Joint Half Tour (Paired with Chauffeur) TRB Planning Apps Conf May 2013Bowman, et al30

31 Survey Joint Travel on School Tours TRB Planning Apps Conf May 2013Bowman, et al31

32 Survey Joint Travel on Work Tours TRB Planning Apps Conf May 2013Bowman, et al32

33 Survey Tours with Joint Half Tour Travel by Type and Household Size TRB Planning Apps Conf May 2013Bowman, et al33

34 Modeling Joint Half Tours TRB Planning Apps Conf May 2013Bowman, et al34

35 Modeling Joint Non-Mandatory Tours TRB Planning Apps Conf May 2013Bowman, et al35

36 Household Version Development Process and Status TRB Planning Apps Conf May 2013Bowman, et al36

37 Day-Level Model Coefficients Model Category Number of Coefficients Number of Logsum Coefficients Household Day Pattern Type23125 Mandatory Activities675 Joint Mandatory Half Tours1208 Joint Non-Mandatory Tours1265 Person Day Activity Pattern42422 Total for Day-Level Models96865 TRB Planning Apps Conf May 2013Bowman, et al37

38 TRB Planning Apps Conf May 2013Bowman, et al38

39 Flexible DaySim Features accessed via configuration file Distributed processing Estimation vs application mode Spatial scale (zones, microzones, parcels) Skim roster (modes, submodes, time periods, variables, VOT) Customized data structures (via inheritance) TRB Planning Apps Conf May 2013Bowman, et al39

40 Flexible DaySim Features accessed via configuration file (cont’d) Short distance calculation method Shadow pricing VOT categories Units (length, distance, monetary) Choice model runner Choice model components Coefficient files TRB Planning Apps Conf May 2013Bowman, et al40

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