Iowa Department of Transportation's Intelligent Transportation System (ITS) Detector Sensors. Sensor Feed: Includes location of sensors, current travel speed, traffic counts, occupancy counts, and more.Work Zone Alert Feed: Includes work zones that have dropped below the normal speed and are determined to have a critical traffic speed abnormality.

Locations of Continuous Counting Stations (CCS), also known as Automatic Traffic Recorders (ATR), and manual counts. CCS's record traffic data throughout the year while manual counts are conducted annually in a different quadrant of the state and in each major metropolitan area.

Live traffic data from Roadway Weather Information System (RWIS) sites in Iowa. Any field of NA or 9999 describes an invalid value being sent from sensor and was excluded for this REST service. This data gets updated every 5 minutes.

Several layers were examined as part of the highway improvement needs and risk analysis conducted for the 2022 State Transportation Plan. Identifying safety risk for the primary highway systems was analyzed through the use of Safety Performance Functions (SPFs) and the subsequent output of Potential for Crash Reduction (PCR). An SPF is an equation used to predict the average number of crashes per year at a location as a function of exposure and, in some cases, roadway or intersection characteristics. Generally, SPFs more realistically demonstrate the relationship between crashes and traffic volume. SPFs account for the regression to the mean by using an Empirical Bayes statistical method. The advantages of using this method are more accurately calculating the potential for safety improvement and acknowledging the complex, non-linear relationship between crash frequency and volume. For any given segment, the potential for crash reduction (PCR) can be determined by evaluating the predicted number of crashes for the location based on volume. This is based on the functional form of the SPF. The predicted number of crashes for a given site is adjusted by the Empirical Bayes method which adjusts the prediction based on the observed crashes at a site. The difference between the corrected number of crashes with the Empirical Bayes and the predicted number of crashes based on the SPF is considered PCR.For the State Long-Range Transportation Plan SLRTP ten different SPF models (and 29 sub models) based on roadway characteristics were developed to evaluate and predict the number of crashes on Iowa’s primary highways. Subsequently, PCR values were calculated for each segment. The results were aggregated to the defined primary highway corridors established by the Systems Planning Bureau. In evaluating safety risk for the purposes of the SLRTP we normalized the PCR per year by the segment or corridors length.Note: this dataset supersedes SCOPING_MOBILITY_AND_SAFETY_RETIRED, effective with the publication of the State Long Range Transportation Plan (SLRTP) and Freight Plan update in 2022.

A SHSP (Strategic Highway Safety Plan) is a statewide-coordinated safety plan that provides a comprehensive framework for reducing highway fatalities and serious injuries on all public roads. The SHSP strategically establishes statewide goals, objectives and key emphasis areas developed in consultation with federal, state, local and private sector safety stakeholders. The SHSP plan process is a requirement of the Federal Highway Administration's Highway Safety Improvement Program (HSIP). In general, the federal HSIP requires that state transportation departments develop an SHSP that: includes consultation from a variety of stakeholders during the development process, analyzes and makes effective use of crash data, addresses the 5Es (engineering, enforcement, education, emergency services and everyone) plus management and operations, considers the safety needs of all public roads, describes a program of projects or strategies to reduce or eliminate safety hazards, is implemented and evaluated. This dataset provides traffic data used for most current SHSP.

Intended for the Public Use of these routes in cases of emergency and for Public planning

description: Iowa turning traffic data (AADT) for intersections on the primary, secondary and municipal roadway systems for 2014. The state is divided into 4 quadrants and each quadrant is counted every 4 years. The Turning Movements application includes all AADT Turning Traffic data for years 1998-2015 and can be found on the Iowa DOT Interactive Map Portal: http://iowadot.maps.arcgis.com/apps/Viewer/index.html?appid=a29e44be6e314799b612335342a13f62; abstract: Iowa turning traffic data (AADT) for intersections on the primary, secondary and municipal roadway systems for 2014. The state is divided into 4 quadrants and each quadrant is counted every 4 years. The Turning Movements application includes all AADT Turning Traffic data for years 1998-2015 and can be found on the Iowa DOT Interactive Map Portal: http://iowadot.maps.arcgis.com/apps/Viewer/index.html?appid=a29e44be6e314799b612335342a13f62

Annual Average Daily Traffic (AADT) volume information for each centerline segment in the State of Iowa.

This service uses a thematic legend to depict the information in the current Traffic Log Book.

Service is not authoritative and is subject to change. Click Here for the authoritative Traffic Service.Traffic volume information for each centerline segment in the state of Iowa. For additional information about a specific volume contact the Office of Systems Planning's Cartography and Traffic team at 515-239-1664.

Live Traffic data from Roadway Weather Information System (RWIS) sites in Iowa. Any field of NA or 9999 describes an invalid value being sent from sensor and was excluded for this REST service. This REST service was originally designed to support the WeatherView app. This data is updated every 5 minutes. The weather data provided here by the Iowa Department of Transportation only reflects conditions at the specified site. Because of Iowa weather patterns, conditions can vary greatly in a small area; i.e., weather conditions a few miles away from the sensor could be completely different. In addition, failure of the sensors, or the equipment processing the information, may occur and produce unreliable information. Therefore, this information should not be used as the only factor in determining whether to travel in a particular area. The Iowa DOT recommends you check a number of sources, including media weather reports, in making your travel plans.

Iowa_Road_Conditions

Sign and post data for Iowa DOT Road Network. This dataset is updated continuously throughout the year.

General vehicle-specific data from the prior 10 years. Data compiled in this format for the Traffic Safety Data and Analysis website (www.iowadot.gov/tsda). Metadata available here.

General crash-wide data from the prior 10 years. Data compiled in this format for the Traffic Safety Data and Analysis website (www.iowadot.gov/tsda). Metadata available here.

Dataset provides data from the Iowa Department of Transportation's Intelligent Transportation System (ITS) CCTV Cameras. Data includes location of cameras, static image URL, and motion video URL where available.

This map features Iowa DOT and RWIS cameras with traffic layer.Additional cameras will be coming soon.Last updated 8/14/2014

TB_CRASHCUSHION

This dataset provides information related to the Iowa Department of Transporation's Intelligent Transportation System (ITS) Digital Message Signs (DMS) devices.

Provides a real-time dashboard of current and historical EIN events managed by the TMC.Dashboard is available here