Calibration Report for the TPB Travel Forecasting Model, Version ...

Calibration Report for the TPB Travel Forecasting Model, Version 2.3
4.6 Trip Attraction Model .................................................................................................................... 4‐18
4.7 Non‐motorized Attraction Trip Model ........................................................................................... 4‐19
4.8 Home‐based Trip Attraction Income Disaggregation Model ......................................................... 4‐20
4.9 Truck Model ................................................................................................................................... 4‐24
4.10 Commercial Vehicle Model .......................................................................................................... 4‐25
Chapter 5 Trip Distribution ........................................................................................................................ 5‐1
5.1 Model Structure ............................................................................................................................... 5‐1
5.2 Internal Motorized Person Models .................................................................................................. 5‐2
5.3 External Auto Person , commercial vehicle, and truck models ....................................................... 5‐6
5.4 Friction Factor Summary .................................................................................................................. 5‐6
Chapter 6 Mode choice .............................................................................................................................. 6‐1
6.1 Overview .......................................................................................................................................... 6‐1
6.2 Treatment of LRT, BRT, and streetcar .............................................................................................. 6‐3
6.2.1 Network representation ........................................................................................................... 6‐4
6.2.2 Transit path building and skimming, mode choice, and transit assignment ............................ 6‐5
6.2.3 Fares .......................................................................................................................................... 6‐5
6.3 Background ...................................................................................................................................... 6‐5
6.4 Detailed description of the TPB nested‐logit mode choice model .................................................. 6‐6
6.4.1 Choice set and nesting structure .............................................................................................. 6‐6
6.4.2 Market segmentation ............................................................................................................... 6‐7
6.4.3 Utility equations ...................................................................................................................... 6‐10
6.4.4 Other details ........................................................................................................................... 6‐16
6.5 Calibration process ......................................................................................................................... 6‐17
6.5.1 Observed data and calibration targets ................................................................................... 6‐18
6.5.2 Calibration results ................................................................................................................... 6‐22
Chapter 7 Time‐of‐Day Model ................................................................................................................... 7‐1
7.1 Model Structure ............................................................................................................................... 7‐1
Chapter 8 Traffic Assignment/Feedback .................................................................................................... 8‐1
8.1 Updated features ............................................................................................................................. 8‐1
8.2 Model structure ............................................................................................................................... 8‐2
8.3 Two‐step traffic assignment ............................................................................................................ 8‐3
8.4 Double run of the travel model to address Northern Virginia HOV/HOT lane policy ..................... 8‐7
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