Comprehensive Validation of an Activity-Based Model – Experiences from Houston-Galveston Area Council’s Activity-Based Model Development
Activity-based models (ABM) are very sophisticated and consist of a number of interrelated, discrete choice modeling components. That is, the upstream model components (long-term choice models) provide inputs to the person-level models (daily activity, intra-household interactions) which, in turn, provide inputs to tour-level models (destination, mode, time of day) and, finally, trip-level models. Due to the number of model components, the complexity of the various models, and the amount of information passed between models, there is a high chance of error propagation if all of the components are not properly calibrated and validated. A rigorous calibration process is necessary for various levels – geographic (regional, sub-regional, county, or district), market segments (income, trip purpose), and household structures and person-types (gender, full time worker, etc). This paper discusses the need for a detailed validation plan and lays out priorities for different tests to be performed. This paper focuses on a comprehensive methodology that was laid out for the Houston- Galveston Area Council (H-GAC) ABM development effort. This paper also presents example calibration results from the H-GAC ABM validation effort for several ABM components.
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Supplemental Notes:
- This paper was sponsored by TRB committee ADB50 Transportation Planning Applications. Alternate title: Comprehensive Validation of Activity-Based Model: Experiences from Houston-Galveston Area Council’s Activity-Based Model Development
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Milkovits, Marty
- Kuppam, Arun
- Kurth, David L
- Rossi, Thomas
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Conference:
- Transportation Research Board 94th Annual Meeting
- Location: Washington DC, United States
- Date: 2015-1-11 to 2015-1-15
- Date: 2015
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; Maps; References; Tables;
- Pagination: 18p
- Monograph Title: TRB 94th Annual Meeting Compendium of Papers
Subject/Index Terms
- TRT Terms: Activity choices; Calibration; Methodology; Travel demand; Validation
- Identifier Terms: Houston-Galveston Area Council
- Uncontrolled Terms: Activity based modeling
- Geographic Terms: Galveston (Texas); Houston (Texas)
- Subject Areas: Planning and Forecasting; Transportation (General); I72: Traffic and Transport Planning;
Filing Info
- Accession Number: 01557878
- Record Type: Publication
- Report/Paper Numbers: 15-4275
- Files: PRP, TRIS, TRB, ATRI
- Created Date: Mar 26 2015 5:27PM