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April 23, 2014
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Home > Transportation > Planning Activities > Models & Forecasts > Modeling Data and Resources

Modeling Data and Resources

Surveys and Data

The models that make up the regional travel demand model are estimated, calibrated, and validated using observed data, supplemented by professional judgment when necessary. Here are some of the major sources of observed data:

  • Census data
  • 2007/2008 COG/TPB Household Travel Survey (HTS), documented here. This also has a Baltimore component;
  • Transit on-board surveys
    • 2008 Metrorail Survey
    • 2008 Regional Bus Survey
    • 2007-2008 On-Board Survey of Maryland Transit Administration (MTA) Riders, which would include users of MARC train service
    • 2005 Virginia Railway Express (VRE) Passenger Survey
  • 2005 COG/TPB Commercial Vehicle Survey (in addition to non-freight commercial vehicles, this survey also included some truck counts)
  • State and local government traffic counts
  • 1994 COG/TPB Auto External Survey
  • 1996 COG/TPB Truck Internal Survey
  • 1996 COG/TPB Truck External Survey

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