The TxDOT Roadway Inventory is a statewide dataset of attribute data routed to TxDOT's roadway network linework using linear referencing. Roadways are dynamically segmented whenever a single attribute changes, resulting in a highly segmented network that can be queried and filtered for specific attribute values. Attributes such as functional system, traffic counts, surface type, speed limits and many more are contained within. This layer is published annually based on end-of-year data that is reported to the Federal Highway Administration. This layer is highly segmented and thus in a different format than most of our regularly published datasets, which are segmented based on a single attribute. The TxDOT Roadway Inventory layer can also be found on txdot.gov and TxDOT’s Open Data Portal. This product is created annually by the Transportation Planning and Programming Division at TxDOT in the Data Analysis, Mapping and Reporting Branch for internal and public use.Last Revision: 09/12/2024TxDOT Roadway Inventory Specifications 2023 AGO OverviewTxDOT Roadway Inventory Specifications 2023 PDF link in AGO Update Frequency: 1 YearsSource: Geospatial Roadway Inventory Database (GRID)Security Level: PublicOwned by TxDOT: TrueRelated LinksData Dictionary PDF [Generated 2025/04/24]

The Texas Department of Transportation (TxDOT) maintains a spatial dataset of roadway polylines for planning and asset inventory purposes, as well as for visualization and general mapping. This dataset covers the state of Texas and includes on-system routes (those that TxDOT maintains), such as interstate highways, U.S. highways, state highways, and farm and ranch roads, as well as off-system routes, such as county roads and local streets. Route segments in this version of TxDOT Roadways are broken by functional classification. For an unsegmented version of TxDOT Roadways, see TxDOT Roadways Unsegmented.This data contains measures. Measures are stored as M-values within each vertex along the line, in the same way that some datasets store z-values for the elevation, except that measures store the distance from the origin, or DFO, along the line. M-enabled networks serve as frameworks for locating roadway assets along the network using linear referencing. This data set must be downloaded as a file geodatabase in order to keep M-Values intact. If downloaded as a shapefile or added to a map from a connection to ArcGIS online, measures will not be applied to the line.Update Frequency: MonthlySource: Geospatial Roadway Inventory Database (GRID)Security Level: Public

The National Highway System (NHS) consists of roadways important to the nation's economy, defense, and mobility (Interstates, Other Principal Arterials, Strategic Highway Network, Major Strategic Highway Network Connectors, and Intermodal Connectors).This statewide NHS dataset is maintained by the Transportation Planning and Programming Division per Federal Highway Administration requirements, and to serve as a base layer for TxDOT's cartographic products.Update Frequency: 1 YearsSource: Geospatial Roadway Inventory Database (GRID)Security Level: PublicOwned by TxDOT: TrueRelated LinksData Dictionary PDF [Generated 2025/04/24]

TxDOT Roadways is a statewide GIS roadway network maintained by TxDOT for roadway asset inventory, planning, and mapping purposes. This data dictionary describes the field names and coded values within.

The Texas Department of Transportation (TxDOT) maintains a spatial dataset of roadway polylines for planning and asset inventory purposes, as well as for visualization and general mapping. This dataset covers the state of Texas and includes on-systems routes (those that TxDOT maintains), such as interstate highways, U.S. highways, state highways, and farm and ranch roads, as well as off-system routes, such as county roads and local streets. Route segments in this unsegmented version are not broken by functional classification the way the other version of TxDOT Roadways feature layer is. This data contains measures. Measures are stored as M-values within each vertex along the line, in the same way that some datasets store z-values for the elevation, except that measures store the distance from the origin, or DFO, along the line. M-enabled networks serve as frameworks for locating roadway assets along the network using linear referencing. This data set must be downloaded as a file geodatabase in order keep M-values intact. If downloaded as a shapefile or added to a map from a connection to ArcGIS online, measures will not be applied to the line.Update Frequency: 1 MonthsSource: Geospatial Roadway Inventory Database (GRID)Security Level: PublicOwned by TxDOT: TrueRelated LinksData Dictionary PDF [Generated 2025/05/21]

The Transportation Planning and Programming (TPP) Division of the Texas Department of Transportation (TxDOT) created and maintains this dataset as a repository for all highway designation changes approved by the Texas Transportation Commission (the Commission), as documented in the "Minute Orders." This dataset includes additions and updates to, and removals from, the state highway system as approved by the Commission.Date valid as of: May 2015Publish Date: May 2015Update Frequency: Monthly

This dataset was created by the Transportation Planning and Programming (TPP) Division of the Texas Department of Transportation (TxDOT) for planning and asset inventory purposes, as well as for visualization and general mapping. It is comprised of all 25 TxDOT Districts. This layer was recently updated to include the district types: Rural, Metro and Urban.Update Frequency: As NeededSource: Transportation Planning and Programming Division (TPP) | Data ManagementSecurity Level: PublicOwned by TxDOT: TrueRelated LinksData Dictionary PDF [Generated 2025/03/17]

Linear feature service of TxDOT Roadway stamped by TxDOT county boundaries for use in the Simplified Roadway Diagram and CRI applicationsUpdate Frequency: 1 MonthsSource: Geospatial Roadway Inventory Database (GRID)Security Level: PublicOwned by TxDOT: TrueRelated LinksData Dictionary PDF [Generated 2025/05/21]

This dataset contains future, planned, proposed, and under-construction tolls as of the end of 2022 for on-system (state owned) and off-system (privately owned) tollways in Texas. Future toll facilities are tracked for the purpose of TxDOT and the public to be aware of where new tolls are being built. Toll data is acquired by TxDOT from the various toll operators and contractors throughout the state.Update Frequency: As NeededSource: Toll AuthoritiesSecurity Level: PublicOwned by TxDOT: TrueRelated LinksData Dictionary PDF [Generated 2025/04/24]

Linear feature service of TxDOT Roadways stamped by TxDOT district boundaries for use in the Simplified Roadway Diagram application.Update Frequency: 1 MonthsSource: Geospatial Roadway Inventory Database (GRID)Security Level: PublicOwned by TxDOT: TrueRelated LinksData Dictionary PDF [Generated 2025/05/21]

The Bridge dataset was developed using data provided by the Bridge Inspection Database. The Bridge Inspection Database contains a record for each Bridge Structure on public roadways in Texas. This includes Bridges maintained by TxDOT, Toll Authorities, Counties, Municipalities, and other jurisdictions. Bridge Inspection data is the primary source used to update the National Bridge Inspection File (NBI) in Washington. For more information on Bridge attribute data, please consult the Bridge Inspection Coding Guide and the Bridge Data Dictionary found at the links below:TxDOT Bridge Coding GuideTxDOT Bridge Data DictionaryUpdate Frequency: NightlySecurity Level: Public

Maintenance Section Offices are the second administrative subdivision under TxDOT Districts and Area Engineer Offices. The Geospatial Roadway Inventory Database application (GRID) is the system of record for storing roadway maintenance designation. The maintenance office designation is coded onto every on-system (state owned) road as a linear feature. Update Frequency: 1 MonthsSource: Geospatial Roadway Inventory Database (GRID)Security Level: PublicOwned by TxDOT: TrueRelated LinksData Dictionary PDF [Generated 2025/05/21]

The percentage of AADT(Annual average daily traffic) that are trucks driving on a route. This data is an extract from the Geospatial Roadway Inventory Database (GRID), which is TxDOT's system for managing roadway assets in Texas. Note: Extracts from GRID are made on a regular basis and reflect the state of the data at that moment. Assets on routes that are in the process of being edited may be affected. Update Frequency: 1 YearsSource: Geospatial Roadway Inventory Database (GRID)Security Level: PublicOwned by TxDOT: TrueRelated LinksData Dictionary PDF [Generated 2025/04/24]

Programmatically generated Data Dictionary document detailing the TxDOT Roadway Inventory service.

    The PDF contains service metadata and a complete list of data fields.
    For any questions or issues related to the document, please contact the data owner of the service identified in the PDF and Credits of this portal item.


  Related Links
  TxDOT Roadway Inventory Service URL
  TxDOT Roadway Inventory Portal Item

Programmatically generated Data Dictionary document detailing the TxDOT Route District service.

    The PDF contains service metadata and a complete list of data fields.
    For any questions or issues related to the document, please contact the data owner of the service identified in the PDF and Credits of this portal item.


  Related Links
  TxDOT Route District Service URL
  TxDOT Route District Portal Item

2023 End of Year roadway data that includes TxDOT highway information for Single Roadbed, Left Frontage and Right Frontage roadbeds. This dataset is produced annually.Update Frequency: 1 YearsSource: Geospatial Roadway Inventory Database (GRID)Security Level: PublicOwned by TxDOT: TrueRelated LinksData Dictionary PDF [Generated 2025/04/24]

Annual average daily traffic. This data is an extract from the Geospatial Roadway Inventory Database (GRID), which is TxDOT's system for managing roadway assets in Texas. Note: Extracts from GRID are made on a regular basis and reflect the state of the data at that moment. Assets on routes that are in the process of being edited may be affected. Updated: AnnuallySource: Geospatial Roadway Inventory Database (GRID)Security Level: PublicUpdate Frequency: 1 YearsSource: Geospatial Roadway Inventory Database (GRID)Security Level: PublicOwned by TxDOT: TrueRelated LinksData Dictionary PDF [Generated 2025/04/23]

The degree to which access is restricted on a roadway. Full-access-control roadways restrict access to interchanges, while no-access-control roadways provide at-grade access to private driveways and at-grade crossings of other public roads. Update Frequency: AnnuallySource: Geospatial Roadway Inventory Database (GRID) Update Frequency: 1 YearsSource: Geospatial Roadway Inventory Database (GRID)Security Level: PublicOwned by TxDOT: TrueRelated LinksData Dictionary PDF [Generated 2025/04/23]

Programmatically generated Data Dictionary document detailing the TxDOT Future Texas Toll Roads service.

    The PDF contains service metadata and a complete list of data fields.
    For any questions or issues related to the document, please contact the data owner of the service identified in the PDF and Credits of this portal item.


  Related Links
  TxDOT Future Texas Toll Roads Service URL
  TxDOT Future Texas Toll Roads Portal Item

Memorial highways pay tribute to notable people or groups and can be designated by the state or by local government. State-designated memorial highways are designated by the Texas Legislature and typically get 2 signs that TxDOT is responsible for maintaining. Chapter 225 of the Transportation code shows the list of legislated memorial highways and is updated after each legislative session. Any local government can designate a memorial highway; however, in order to install signage on TxDOT right of way, the proposed designation must be approved by the TxDOT Commission or Executive Director.This layer reflects the designations through the 87th legislative session, which concluded in 2021. The layer will be updated again at the conclusion of the 88th legislative session in 2023. Historic Commission Minute Orders, Historic Blue Star highways, and Odd History memorial highways are kept track of by TRF but legacy memorial highways that may not have signage. These are represented by "Other" in the field DES_TYPE.Source: Geospatial Roadway Inventory Database (GRID)Updated: Biannually Security Level: PublicUpdate Frequency: 2 YearsSource: Geospatial Roadway Inventory Database (GRID)Security Level: PublicOwned by TxDOT: TrueRelated LinksData Dictionary PDF [Generated 2025/04/24]