Alamo Area Metropolitan Planning Organization
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Traffic Analysis Zone - with MPO-related layers

The demographic data bases are composed of population, households, household income and employment inventories for each traffic analysis zone (TAZ) comprising the study area. TAZs are the geographic units used to inventory existing and future demographic data required for modeling purposes. Typically, a TAZ structure is developed that is consistent with the defined roadway structure. This is accomplished by allowing network roadways to be the primary definition of TAZ boundaries and attempting to minimize roadways that traverse individual TAZs. The rationale for such a structure definition is that the model will perform better by providing trips comparable access opportunities to adjacent streets and transit lines.

2015-2045 - Used with SAMM 4.1

TransCAD ArcGIS (.shp) Excel (.xls)

2020-2050 - Used with SAMM 5.0

TransCAD ArcGIS (.shp) Excel (.xls)

Highway Network – with MPO related layers

The current 2017 baseline year network, along with 2025, 2035 and 2045 TIP/MTP networks used for Air Quality Conformity are available for downloading in TransCAD or ArcGIS formats. The region’s highway networks, which are coded for use by the Travel Demand Model SAMM 4.1 covers all of five counties including Bexar, Comal, Guadalupe, Kendall & Wilson Counties. The highway networks are generally considered to represent all roadways classified as collector and above within the Functional Classification system. Specific roadway attributes for the coded networks include Functional Classification (FUNCL), Facility Type (FTYPE), Direction (one or 2-way) Area Type (AT), Lanes, Street Name, County, Speeds, Capacity, Counts, Modeled or Projected Volumes, CMP Volumes, Travel Times and Toll costs where applicable. For modeling purposes, the roadway networks are used to estimate travel time skims (AM/PM peak travel period and off-peak roadway travel times for all TAZ to all other TAZ). Travel time skims are indicative of accessibility, thus affecting travel orientation and traffic patterns.

Disclaimer: Locally adopted TIP/MTP networks,  but not officially conforming to AQ standards, pending FHWA approval

-Updated 08/05/2021

Download preferred format and year:

2017 - Esri 2025 - Esri 2035 - Esri2045 - Esri

2017 - TransCAD2025 - TransCAD2035 - TransCAD2045 - TransCAD


Transit Network – with MPO related layers

The 2017, 2025, 2035 & 2045 Transit Networks are also available. The 2017 transit system, which operates almost exclusively along mixed flow highway links, consists of 50+ bus routes for various bus modes including Metro, Frequent, Express, Skip & Trolley. Future year transit networks contain additional premium modes of transit.

Disclaimer: Locally adopted TIP/MTP networks,  but not officially conforming to AQ standards, pending FHWA approval

-Updated 9/22/2020

Download preferred year:

Transit 2017 - Esri Transit 2025 - EsriTransit 2035 - EsriTransit 2045 - Esri