Transportation Analysis Zones (TAZ) for the COG/TPB Modeled Region dataset is used to join several types of zone-based transportation modeling data. The transportation-specific version of TAZ is called TPB - TAZ and the version applicable for Cooperative Forecasting purposes is called COG - TAZ. This dataset was updated during 2008-2009 and finalized in July 2009. The zone structure was designed to be usable and meaningful until the next TAZ update, which has historically been every 10-15 years. 

The TAZ system was developed to address both the present and the future-- what has occurred in the region since the last zone expansion, with respect to the increase and shifts in development, as well as what types of development patterns are being planned for the future. The zone structure also pays special attention to existing and emerging activity centers, those both regional and local in scale, as well as the location of planned public transportation facilities. 

Map service contains the following layers:

TAZ - TPB and TAZ - COG from the 3722 zone system Transportation Analysis Zones (TAZ) for the TPB Modeled Area

Previous versions of the Cooperative Forecast can be joined to these layers using the TAZ field.  The spreadsheet can be found here.

For more information about the Cooperative Forecasting process, please visit the Cooperative Forecasting & Data Subcommittee page