Welcome to Road Weather Management
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
- Guidelines for Disseminating Road Weather Messages (2012) (PDF 7MB)
- Use of Mobile Data for Weather-Responsive Traffic Management (2012) (PDF 1.9M)
- Guidelines for the Use of Variable Speed Limit (VSL) Systems in Wet Weather (2012) (PDF 2.7MB)
- The Vehicle Data Translator (VDT) Version 3.0 (2011) (PDF 38.5MB)
- MDSS Prototype Release 6.0
- Developments in Weather-Responsive Traffic Management Strategies (2011) (PDF 4.2MB)
- Weather Information Integration in Transportation Management Center (TMC) Operations (2011) (PDF 6.6MB)
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
- 2014 Road Weather Management Stakeholder Meeting – The 2014 U.S. DOT Road Weather Management Stakeholder Meeting will take place in Salt Lake City, Utah on August 12-14, 2014.
- 2nd National Weather Responsive Traffic Management Meeting and Workshop – View and download Summary Report (PDF 1.2MB) and presentations from the meeting held in Salt Lake City, UT last September 26-28, 2013.
- Road Weather Management Web-Based Courses - FHWA and the Consortium for ITS Training and Education (CITE) are now offering three interactive web-based courses: (1) Principles and Tools of Road Weather Management, (2) RWIS Equipment and Operations, and (3) Weather Responsive Traffic Management. A new Road Weather Management Certificate is also being offered to those who will complete these three core RWM courses and additional elective courses on ITS. Information about the 2014 Road Weather Management Courses (which are currently offered free for transportation agencies) can be found at http://citeconsortium.org/courses/2014Blended_RW_021114.pdf (PDF 144KB).
- NWS Web-Based Training - FHWA and the Cooperative Program for Operational Meteorology, Education and Training have developed a web-based training course for road weather management staff to learn about National Weather Service products, forecasts and warnings.
PDF files can be viewed with the Acrobat® Reader®.