2015 Travel Demand Model Documentation TAC Approval August 22, 2016 Approved BTPO Policy Board 09,12,2016 TABLE OF CONTENTS 1 Introduction .......................................................................................................................................... 1 2 Street Network and Traffic Analysis Zone (TAZ) ................................................................................... 1 2.1 Street Network Development ....................................................................................................... 2 2.2 Traffic Analysis Zone ..................................................................................................................... 6 3 Initialization ........................................................................................................................................... 6 4 Network Skimming .............................................................................................................................. 12 5 Household Disaggregation .................................................................................................................. 12 6 Trip Generation ................................................................................................................................... 15 7 Trip Distribution .................................................................................................................................. 17 8 Mode Split and Time of Day ................................................................................................................ 19 9 Highway Assignment ........................................................................................................................... 25 10 Model Estimation and Calibration ...................................................................................................... 27 1) Household Disaggregation Model................................................................................................... 27 2) Trip Generation ............................................................................................................................... 28 3) Trip Distribution .............................................................................................................................. 30 4) Mode Split ....................................................................................................................................... 33 5) Time of Day Factors ........................................................................................................................ 36 6) External to External Trip Distribution ............................................................................................. 40 11 Model Validation ................................................................................................................................. 41 11.1 Network Zones ............................................................................................................................ 41 11.2 Socioeconomic Data .................................................................................................................... 41 11.3 Trip Generation ........................................................................................................................... 41 11.4 Trip Distribution .......................................................................................................................... 42 11.5 Mode Split, Vehicle Occupancy, and Commercial and Other Trips ............................................ 45 11.6 Network Assignment ................................................................................................................... 46 11.6.1 Daily Traffic Assignment ...................................................................................................... 47 11.6.2 PM Peak Hour Traffic Assignment ...................................................................................... 49 11.6.3 Mid-Day Peak Hour Traffic Assignment .............................................................................. 50 11.6.4 Assessment ......................................................................................................................... 51 12 Future Year Modeling or Scenario Modeling ...................................................................................... 51 12.1 Required File Changes ................................................................................................................. 51 Page | i 12.2 Potential Change for Scenario Modeling .................................................................................... 52 Appendix A. Acronyms ................................................................................................... A-1 Appendix B. Model Structure and Contents ................................................................... B-1 List of Tables Table 1- Street Network link Attributes ........................................................................................................ 3 Table 2- Input and Output Table of the Initialization Stage ......................................................................... 8 Table 3- List of Attributes in the Cross_FT_AT.bin FIle ................................................................................. 8 Table 4 - Area Type Definition ...................................................................................................................... 8 Table 5 - Cross_FT_AT.bin File ...................................................................................................................... 9 Table 6- List of Attributes in the Turn Penalty.dbf File ................................................................................. 9 Table 7- List of Attributes Appended to the HighwayNetwrok.dbd File ..................................................... 10 Table 8- List of Input and Output Files to Network Skimming Stage .......................................................... 12 Table 9- List of Input and Outputs Files to the Household Sub Model ....................................................... 13 Table 10- List of Attributes on TAZDATA_2015.bin File .............................................................................. 13 Table 11- Percent of one, two, three, and four or more person households based on TAZ Average Household Size ............................................................................................................................................ 13 Table 12- Percentage of zero, one, two, or three Worker Households Based on Household Size ............ 14 Table 13 - List of Attributes added to the TAZDATA_2015.bin File ............................................................ 15 Table 14- List of Input and Output Files in Trip Generation ....................................................................... 16 Table 15- List of Attributes in triprate.csv Table ......................................................................................... 16 Table 16- Trips Rates by the Number of Persons and Workers .................................................................. 16 Table 17- List of Attributes in tripsBYPurpose.bin File ............................................................................... 17 Table 18- List of Input and Output Files to Trip Distribution ...................................................................... 18 Table 19- List of Input and Output Files to Mode Split Stage ..................................................................... 20 Table 20- List of Attributes in Mode Split (modesplit.csv) .......................................................................... 22 Table 21- Model Split .................................................................................................................................. 22 Table 22- List of Attributes in Time of Day (TOD_Factors.csv) ................................................................... 24 Table 23- List of Attributes to Vehicle Occupancy (VECOCC_factors.csv) and Factors .............................. 24 Table 24- List of Attributes in External Average Daily Traffic (External_ADT..bin) ..................................... 24 Table 25- List of Calculated Attributes Added to External_ADT.bin File .................................................... 24 Table 26- List of Attributes and Output Files to Highway Assignment ....................................................... 26 Table 27- Parameters Used in the Highway Assignment ............................................................................ 26 Table 28- Highway Assignment Calculated Fields ....................................................................................... 27 Table 29- Percent of Workers per Household Size Lookup Table ............................................................... 28 Table 30- Home Based Work Trip Rates ..................................................................................................... 29 Table 31- Home Based College Trip Rates .................................................................................................. 29 Table 32- Home Based School Trip Rates ................................................................................................... 29 Table 33- Home Based Shopping Trip Rates ............................................................................................... 30 Table 34- Home Based Other Trip Rates ....................................................................................................