Modeling Data and Resources

Surveys and Data

All COG/TPB travel models are empirically estimated and calibrated using observed data. Here are some of the major sources of observed data:

• 1990 Census Transportation Planning Package (CTPP);
• 1993 Baltimore Regional Household Travel Survey (BTS);
• 1994 COG/TPB Household Travel Survey (HTS);
• 1994 COG/TPB Auto External Survey (AES);
• 1994 WMATA Metrorail Survey (WMS);
• 1996 COG/TPB Truck Internal Survey;
• 1996 COG/TPB Truck External Survey (TES);
• 2000 Census Transportation Planning Package (CTTP);
• 2000 WMATA Bus Survey; and
• 2002 WMATA Rail Survey.

Web Resources

• Association of Metropolitan Planning Organizations (AMPO)
• Institute of Transportation Engineers (ITE)
• Transportation Research Board (TRB)
• U.S. Census
• U.S. DOT's Travel Model Improvement Program (TMIP)