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The source code and documentation for the PikalertVehicle Data Translator (VDT) has been released onto the OSADP and is now available for download. To download this application, you need to sign in as a registered user. To download the software, please click here. If you do not have an account, you may submit an account registration request by completing the registration form.

The PikalertVDT turns weather observations into useful information for drivers. Inputs include vehicle-based measurements (i.e., vehicle actions, road conditions, and observations of the surrounding atmosphere) along with more traditional weather data sources. The VDT matches vehicle and weather data to the road segment based on position (latitude and longitude from global positioning system, GPS, data). The weather data are assigned to same road segments. The output is road segment characterizations of weather and road conditions (i.e., “nowcasts” and forecasts).

The VDT quality checks and aggregates vehicle observations along with ancillary weather data to provide a data set of road observations to the driver. The Pikalert system includes a Road Weather Hazard module component, which takes the vehicle observations and other weather data from the VDT output and produces assessments of precipitation, pavement, and visibility hazards, e.g., heavy rain or snow-covered roads. The Pikalert system has been running in real time as part of the Integrated Mobile Observations (IMO) project in partnership with the Michigan, Minnesota, and Nevada Departments of Transportation (DOTs), who have been providing connected vehicle data into the system and using and evaluating the Pikalert outputs.

The PikalertVDT was developed by the National Center for Atmospheric Research (NCAR) with funding and support from the U.S. Department of Transportation’s (USDOT) Research and Innovative Technology Administration (RITA) and direction from the Federal Highway Administration’s (FHWA) Road Weather Management Program as part of the Enhanced Maintenance Decision Support System (EMDSS). EMDSS is a system designed to reduce accidents and save states millions of dollars in winter maintenance costs.

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