Puget Sound Regional CouncilThe TAZ 2000 shapefile (938 zones for the 4-county region) was zone system for PSRC`s travel modeling efforts until 2011 when there was an expansion to 3700-zones (TAZ 2010). TAZs are Traffic Analysis Zones and are the geographic unit used by the travel model. This TAZ shapefile extends out into the water for all shoreline zones, so the area and perimeter fields don`t represent the land area of the zone in those cases. There is another version of this shapefile (taz2000_no_water.shp) which is clipped at the shoreline which should be used in any density or other area-based calculations.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/491d842f59a04b3ebfb8aeaf4a2cad3d_0engPuget Sound Regional Council Data PortalPublicTransportation Analysis Zones 2000 [Washington (State)--Puget Sound Region]Web servicesWashington (State)--Puget Sound RegionWashington (State)2000