Data Dictionary for District Traffic Web Map used in TPP Statewide Traffic Count App

Permanent count stations refer to traffic counters that operate and collect traffic data continuously, 24 hours a day, 365 days a year. Permanent traffic counters produce Annual Average Daily Traffic (AADT), and some locations may also collect classification and/or weight data. The permanent traffic counting machines and data are maintained by TxDOT TPP Traffic Section. Update Schedule: As NeededSecurity Level: Public

This is a public and downloadable traffic data product of statewide average annual daily traffic (AADT) counts. Annual average daily traffic is a measure of transportation system use that represents the typical traffic volume at a location. Standard traffic monitoring AADT calculation methods vary depending on traffic data collection equipment, data type, and frequency. The TxDOT AADT count data in this layer is calculated as 24 hour volume pneumatic tube count x Axle Correction Factor x Monthly Adjustment Factor. In a small number of cases, other methods may be used at TxDOT's discretion.Updated: Annually in JulySource: Statewide Traffic Analysis and Reporting System IISecurity Level: Public

This is a public and downloadable traffic data product of statewide average annual daily traffic (AADT) counts on ramp type roadbeds. Annual average daily traffic is a measure of transportation system use that represents the typical traffic volume at a location. Standard traffic monitoring AADT calculation methods vary depending on traffic data collection equipment, data type, and frequency. The TxDOT AADT count data in this layer is calculated as 24 hour camera vehicle count x monthly adjustment factor. In a small number of cases, other methods may be used at TxDOT's discretion.Updated: Annually in JulySource: Statewide Traffic Analysis and Reporting System II (STARS II)Security Level: Public

The traffic stations at these locations collect short-term traffic count data to produce Annual Average Daily Traffic (AADT). This point layer contains combined traffic counts from mainlanes and frontage roads at one station displayed on the centerline of the roadway for the State of Texas. The data is created and maintained by the Transportation Planning and Programming (TPP) Division’s Traffic section at TxDOT. Traffic counts are collected on an annual basis as a means of measuring the use of public roads in the state. AADTs are calculated using a volume count, axle factor, and seasonal factor. A general overview of the equation is AADT = axles * axle factor * seasonal factor. The data is sourced from the Statewide Traffic Analysis and Reporting System (STARS II).

Short term traffic counts conducted under the TxDOT Transportation Planning and Programming Division Statewide Traffic Monitoring Program. This spatial data includes 24-hour AADT (Annual Average Daily Traffic) which is collected once every 5 years on roads which are not state maintained, such as county roads and city streets.Data files were previously called “Urban ACR” traffic counts.

This web map is the latest in map series that has been published by the Texas Department of Transportation since the 1930's to report traffic volumes on state highways. Originally printed, then produced in digital PDF, the statewide traffic map is now published in a web format to provide annual average daily traffic (AADT) count information in a user-friendly format.Updated: Annually in JulySource: Statewide Traffic Analysis and Reporting System IISecurity Level: PublicData Dictionary

Point layer depicting traffic counts on TxDOT owned and maintained roadways. The traffic stations at these locations collect Annual Average Daily Traffic.

User guide for the ArcGIS Online Statewide Traffic Count AppThe guide covers essential aspects, including:Map Functions Overview: This section details the basic interactive functions of the map, including zooming, panning, and identifying features. It will explain how to navigate the map interface effectively, find specific locations, and understand the map's overall layout and controls. Turn Layers On and Off: This portion of the guide will teach users how to control the visibility of different data layers within the map. Users will learn how to toggle layers on and off to customize the map display, focusing on specific traffic count data or related information. This allows for a more focused analysis of the data. Attribute Table and Export Data: This section explains how to access and utilize the attribute table associated with the traffic count data. Users will learn how to view detailed information about each traffic count location, including specific count values, dates, and other relevant attributes. Furthermore, this section will instruct how to export the attribute table data into formats like CSV or Excel for further analysis outside of the online application. Downloading Data: This portion of the guide will explain how to download the traffic count data. It will explain what file types are available for download, and any restrictions that are placed on the data.

The TxDOT Roadway Inventory 2018 layer is a statewide dataset that has attribute information routed to TxDOT Roadway linework. By using linear referencing tools, attribute information from the TxDOT Roadway Inventory table are located on the linework. Roadway attributes such as functional system, traffic counts, surface types among many others can be found on a roadway simply by selecting it or performing a query. The TxDOT Roadway Inventory layer can also be found on www.TxDOT.gov and TxDOT’s Open 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.Update Frequency: 1 YearsSource: Geospatial Roadway Inventory Database (GRID)Security Level: PublicOwned by TxDOT: TrueRelated LinksData Dictionary PDF [Generated 2025/04/24]

This is a public and downloadable traffic data product which includes a subset of statewide average annual daily traffic (AADT) counts that are reported to the TxDOT Roadway Inventory. Annual average daily traffic is a measure of transportation system use that represents the typical traffic volume at a location. Standard traffic monitoring AADT calculation methods vary depending on traffic data collection equipment, data type, and frequency. The TxDOT AADT count data in this layer is calculated as 24 hour volume x Axle Correction Factor x Monthly Adjustment Factor, or by traffic monitoring ramp balancing procedures. In a small number of cases, other methods may be used at TxDOT's discretion.Updated: Annually in JulySource: Statewide Traffic Analysis and Reporting System II (STARS II)Security Level: Public

The TXDOT saturation counts show average daily traffic (ADT) counts on TxDOT-maintained roads, county roads and city streets over a 24 hour period.Learn more about TXDOT's annual average daily traffic (AADT) counts: TXDOT Traffic Counts.

This map contains layers including:Traffic counts on TxDOT owned and maintained roadways. These counts show annual average daily traffic as shared by TxDOT. The City of Grapevine is not responsible for its data accuracy or currency. The locations are represented by blue vehicles on the map.Grapevine Local bi-directional 24 hour automatic traffic recorder counts as collected for the City Traffic Department. The locations are represented by purple vehicles on the map.State and Local Traffic Signals. Red traffic lights are the location of state maintained traffic signals, and green traffic lights are the location of city maintained traffic signals. This map can be referenced before submitting a city traffic complaint form regarding a traffic signals.Location of school flashers. School flashers are represented by a yellow school zone sign on the map. To use map, click on a symbol and a pop-up window will appear with related information.Panel on right side of map provides tables of information, layer control (on and off), legend, and sharing abilities.

This feature service contains reference and location information for TxDOT's statewide traffic count stations. This layer does not contain traffic count data.Revision 3/4/2024: Feature Layer is updated to show only master station records. Directional stations are no longer visible.Updated: DailySecurity Level: Public

This data and application were developed to show statewide annual average daily traffic (AADT) increases and decreases over time using continuous traffic count data. The map featured in this application shows years leading up to the COVID 19 pandemic in 2020, through the latest currently available data year.Update Frequency: AnnualSecurity Level: Public

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 TxDOT Roadway_Linework_wAssets feature class is a statewide dataset that has attribute information routed to TxDOT Roadway linework. By using linear referencing tools, attribute information from the TxDOT Roadway Inventory table are located on the linework. Roadway attributes such as functional system, traffic counts, surface types among many others can be found on a roadway simply by selecting it or performing a query. The TxDOT Roadway Inventory layer can also be found on 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.To create a line event (route), use ROUTE_ID from TxDOT Roadway Linework as the Route Identifier. Then, use the TxDOT Roadway Inventory table: RIA_RTE_ID as the Route Identifier, FRM_DFO and TO_DFO as the measure fields.Updated: AnnuallySource: Geospatial Roadway Inventory Database (GRID)

Programmatically generated Data Dictionary document detailing the TxDOT Congestion 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 Congestion Service URL
  TxDOT Congestion Portal Item

Traffic analytics, rankings, and competitive metrics for txdot.gov as of August 2025

Quantifying and communicating congestion on highways and local streets in Texas is challenging. A clear, replicable, and easily understandable method is required to help manage, score, and evaluate planned projects in the Transportation Planning and Programming Division. This congestion calculation was performed using a method created by TxDOT referred to as the ‘Car Space’ method. This method differs from other, more traditional methods, by determining the space between cars in one mile increments. This method factors number of lanes, Annual Average Daily Traffic (AADT), andaverage car length to calculate the space remaining between vehicles for each 1 mile segment of roadway during the 26th peak hour. The calculated space between cars, or lack thereof, is categorized to illustrate levels of congestion. This layer is a peak hour congestion forecast for the year of 2044 and is based on 2024 data.Congested = less than 175' between cars Moderately Congested = between 175' and 350' between cars Not Congested = greater than 350' between cars* This feature service contains fields for current and future congestion levels. Update Frequency: Annually Security Level: PublicUpdate Frequency: 1 YearsSource: Transportation Planning and Programming Division (TPP) | Data ManagementSecurity Level: PublicOwned by TxDOT: TrueRelated LinksData Dictionary PDF [Generated 2025/04/23]