9.2.3.1 Travel Demand Model

If updating the TDM is necessary, collect the following data to complete the analysis:
  • Socioeconomic and demographic data;
    • Latest census
    • Land use data
    • Travel surveys
  • OD data, such as Streetlight, Replica, and INRIX (also outputs travel times);
  • Traffic counts; and
  • Geometric data
    • Segment: length, number of lanes, lane assignments, area type, posted speed and/or free flow speed, highway type
For more guidance on data and input parameters for a TDM, coordinate with the TPP Division for the SAM and MPOs for their respective TDMs.
Data requirements for macroscopic analysis of segments using service volume tables are shown in . Existing or anticipated traffic volumes are used to compare values from the service volume tables to determine whether the facility needs further analysis.