GIS Analysis


This program is responsible for oversight of geographical information systems (GIS) related to statewide roadway inventory, the Arizona Transportation Information System (ATIS), which is ADOT’s transportation network linear referencing system (LRS). This dataset supports FHWA's Highway Performance Monitoring System (HPMS) submittal and the All Roads Network of Linear Referenced Data (ARNOLD). This linear reference system is the backbone for the Roadway Characteristics Inventory (RCI) that supports the thirty-seven (37) fundamental data elements that are a part of the Model Inventory of Roadway Elements (MIRE). Creation of the annual Highway Log and photolog imagery is vital for internal clients and contractors that work with ADOT. Tools utilized include aerial photogrammetry, GPS, cartography, online interactive mapping, remote sensing, ArcGIS, data visualization, and database maintenance related to the LRS/RCI database. This program is also responsible for agency-wide mapping and data requests.

Arizona Transportation Information System (ATIS)

The authoritative roadway centerline dataset is owned and maintained within the Geospatial Analysis Section. The roadway centerline functions as a Linear Referencing System (LRS) which is the back bone for which all roadway characteristics data is amalgamated. This dataset supports a number of annual Federal reports such as the All Roads Network of Linear-Referenced Data (ARNOLD) and Highway Performance Monitoring System (HPMS).


Roadway Characteristics Inventory (RCI)

The maintenance of roadway characteristics data directly supports HPMS data needs. Roadway characteristics data include items such as number of lanes, speed limit and functional classification. This data is maintained all within a GIS, it is intern used for data visualization and analysis.


GIS Data

The Geospatial Analysis team owns and maintains a number of GIS data layers. Many of which are available on Arizona's statewide data clearing house, AZGeo. Anyone looking to acquire authoritative data should visit the AZGEO website. Users can search via keywords or browse by categories. Metadata is also provided to help users understand the proper use cases of the data.


Map Request

The Geospatial Analysis section develops paper and interactive maps for internal customers. Several commonly requested maps are available for consumption. An online request form is being developed.



The Geospatial Analysis section performs extensive outreach with state and local agencies. This outreach includes data requests for both internal and external customers. This outreach also includes training, mapping and analysis for internal customers.  For those customers that don't know much about how Geographic Information Systems (GIS) can help them, a story map has been developed to support them. The ADOT fact sheet includes interesting information about ADOT and it's road network. Please reach out to the GIS team at [email protected] if you have any questions.


1998 State Highway System Log