The Texas Department of Transportation (TxDOT)maintains a spatial dataset of roadway polylines for planning and assetinventory purposes, as well as for visualization and general mapping. Thisdataset covers the state of Texas and includes on-system routes (those thatTxDOT maintains), such as interstate highways, U.S. highways, state highways,and farm and ranch roads, as well as off-system routes, such as county roadsand local streets.This data contains measures. Measures are storedas M-values within each vertex along the line, in the same way that somedatasets store z-values for the elevation, except that measures store thedistance from the origin, or DFO, along the line. M-enabled networks serve asframeworks for locating roadway assets along the network using linearreferencing. This data set must be downloaded as a file geodatabase in order tokeep M-Values intact. If downloaded as a shapefile or added to a map from aconnection 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 2025/04/24]

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]

The geo-spatial data was primarily created from the conversion land surveying records and data. The data was created for internal use during the acquisition of additional Right of Way parcels and to aide in the location of the Right of Way during construction and maintenance. It was also created for the Public to be more completely informed how a project may impact their property or the area they live in. The descriptive or status data information for each parcel or tract of land is from the TxDOT Right of Way Information System database (ROWIS) and is updated daily at Midnight). Additions to the geo-spatial data are made on an ongoing basis and become available after one of the two daily updates.

Network of Texas Railroads pulled from the Federal Railroad Administration (FRA) North American Rail Network (NARN) Rail Lines publicly available data. The data was clipped to the Texas State Boundary and queried to a records subset based on "current status or condition of rail line" as populated in the "NET" attribute. Additional fields were added and populated to adhere to TxDOT requirements and purposes.Update Frequency: 1 MonthsSource: Federal Railroad Administration (FRA)Security Level: PublicOwned by TxDOT: FalseRelated LinksFRA NARN Source DataTexas Railroads (Deprecated)Data Dictionary PDF [Generated 2025/04/29]

DISCLAIMER: This product is for informational purposes and may not have been prepared for or be suitable for legal, engineering, or surveying purposes. It does not represent an on-the-ground survey and represents only the approximate relative location of property boundaries.Copyright 2014 Texas Department of Transportation.Content is updated two (2) times daily (Noon and Midnight).Supported and maintained by the TxDOT Right of Way Division, Right of Way Asset Management Section, 118 E. Riverside Drive (Bldg. 118), Austin, Texas 78704. For more information call the Right of Way Division's Main number: 512-416-2901 or email Dan Erwin, RPLS, PLS, R/W Land Surveyor and GIS Specialist at: Dan.Erwin@txdot.gov

Polyline layer for use within the Commercial Signs, Junkyards, and Regulated Highways map for public use showing Interstate and Primary Highways, as well as Rural Roads. These roadway classifications are used for the regulation of commercial signs within the State of Texas. This statewide dataset was created by Right of Way Division of TxDOT utilizing roadway data collected by the Transportation Planning and Programming Division. This layer uses the TxDOT Functional Classification layer to determine roadway type.The Highway Beautification Act of 1965 (23 USC §131) requires the states to control outdoor advertising on Interstate and primary highways. In Texas, this is accomplished through the regulation of commercial signs under the Texas Litter Abatement Act (HB 1529, 67th Leg, RS), which was originally passed in 1976 and is codified under Texas Transportation Code Chapter 391. Additionally, Texas regulates off-premise outdoor signs on all non-primary public roadways outside city limits under Texas Transportation Code Chapter 394. These roadways are referred to as Rural Roads. Update Frequency: AnnuallySource: Geospatial Roadway Inventory Database (GRID)Security Level: Public