Road Weather Management Program
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Welcome to Road Weather Management

Weather-Savvy Roads

Under the FHWA Every Day Counts (EDC) program, we are promoting deployment of two Road Weather Management solutions: Pathfinder and Integrating Mobile Observations. The Pathfinder Implementation Guide (PDF 2MB) is now available. Additional information can be found here:

What's New

Guidelines for Deploying CV-Enabled WRTM Strategies

The Road Weather Management Program and the ITS Joint Program Office published a document titled Guidelines for Deploying Connected Vehicle-Enabled Weather Responsive Traffic Management Strategies (PDF 5MB). The document provides useful information for transportation agencies on how they can incorporate road weather connected vehicle data for traffic management operations and decision-making.

Pikalert® Vehicle Data Translator

The Pikalert® Vehicle Data Translator (VDT) is software that leverages roadway and atmospheric data from traditional sources (Road Weather Information System (RWIS) stations, forecasts from the National Weather Service (NWS), radar, etc.) as well as from new data sourced from connected vehicles (CV) and fuses them in order to make inferences on weather and road conditions that can be used to support maintenance, operations, and travel decisions. Version 5.0 of the VDT system has been posted in the Open Source Application Development Portal (OSADP – and it is ready for use. Over the past year FHWA made a series of enhancements to the code so that pavement and atmospheric condition inferences made by the system are more accurate and the user interface is more user friendly. The documentation for the tool has been updated as well.

Road Weather Management Capability Maturity Framework (Workshop and Tool)
Transportation agencies can avail of a facilitated workshop and/or use the electronic tool on their own to conduct Road Weather Management Capability Maturity assessments. The Capability Maturity Framework workshop and electronic tool will evaluate the agency’s ability to effectively manage operations during adverse weather conditions. When the existing capability levels are determined, a list of concrete actions is created for agencies to raise their capabilities to the desired levels. To schedule a workshop, contact Roemer Alfelor at or 202-366-9242.

Benefit-Cost Analysis for Road Weather Management: Compendium and Briefs
The FHWA Road Weather Management Program published a Compendium and three Technical Briefs on Benefic Cost Analysis (BCA) for Road Weather Management (RWM). This compendium provides detailed guidance on benefit cost analysis for transportation operations with a focus on Road Weather Management Strategies, and presents seventeen case studies. The technical briefs (1, 2 and 3) summarize the application of BCA concepts and tools to RWM as well as the examples that are found in the compendium, including BCA for Road Weather Connected Vehicle Applications

Publications Now Available

Additional Listing of Road Weather Management Program Publications

Adverse weather conditions have a major impact on the safety and operation of our Nation's roads, from signalized arterials to Interstate highways. Weather affects driver behavior, vehicle performance, pavement friction, and roadway infrastructure. Weather events and their impacts on roads can be viewed as predictable, non-recurring incidents that affect safety, mobility and productivity. Weather affects roadway safety through increased crash risk, as well as exposure to weather-related hazards. Weather impacts roadway mobility by increasing travel time delay, reducing traffic volumes and speeds, increasing speed variance (i.e., a measure of speed uniformity), and decreasing roadway capacity (i.e., maximum rate at which vehicles can travel). Weather events influence productivity by disrupting access to road networks, and increasing road operating and maintenance costs.

Web-Based Course/Training

Upcoming Events

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