Road Weather Management Program
photos of lightning, trucks plowing snow, an empty road before a storm, and an evacuation
Office of Operations 21st century operations using 21st century technologies

Welcome to Road Weather Management

What's New

Weather Responsive Traffic Signal Timing at Utah DOT
The FHWA Road Weather Management Program worked with Utah DOT to implement and evaluate an advanced traffic signal timing (PDF 993KB) system/strategy that is responsive to changes in traffic demands and travel speeds during inclement weather. Select here for full report (PDF 2.8MB). A traffic estimation and prediction system (TrEPS) was also developed for weather responsive traffic signal timing. Select here for Final Report (PDF 4.6MB).

Road Weather Management Performance Measures: 2012-2013 Update
This report (PDF 2.2MB)includes a background on the development and update of RWMP performance measures since 2007 including the approaches and data sources used, and the results of the most recent (2012-2013) road weather management performance assessment conducted by FHWA.

Utah DOT Citizen Reporting Program for Road Weather
The FHWA Road Weather Management Program partnered with Utah DOT to develop, test and deploy a citizen reporting program (PDF 770KB) that allows travelers to provide road weather information reports using their smart phones. Select here for full report.

Concept of Operations for Road Weather Connected Vehicle Applications
This document (PDF 3.3MB) contains various Concepts of Operations (ConOps) for connected vehicle-enabled road-weather applications. The ConOps are intended to expand the amount of data used to assess, forecast, and address weather impacts on roads, vehicles, and travelers.

Results from the Integrated Mobile Observations Study
The document (PDF 11MB) provides a short overview of the Vehicle Data Translation (VDT) software, which combinas vehicle-based measurements of the road and surrounding atmosphere with other weather data sources, describes possible applications for key end-users of the VDT, and describes the data standards necessary for mobile weather data.

Best Practices for Road Weather Management, Version 3.0
This report (PDF 2.3MB) contains 27 case studies of systems in 22 states that improve roadway operations under inclement weather conditions. Each case study has six sections including a general description of the system, system components, operational procedures, resulting transportation outcomes, implementation issues, as well as contact information and references.

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.

Road Weather Management Stakeholder Meetings

Web-Based Course/Training

Upcoming Events

PDF files can be viewed with the Acrobat® Reader®.

Office of Operations