Research led by John N. Ivan, Professor in the School of Civil and Environmental Engineering, has been recognized by the Transportation Research Board (TRB) as part of its nationally distributed TRB Weekly newsletter. The feature highlights the team's work on improving roadway safety and travel reliability during adverse weather conditions through the use of real-time warnings and variable speed limits.
The research appears in NCHRP Research Report 1176: Real-Time Warnings and Variable Speed Limits: Safety and Travel Reliability During Weather Events and its accompanying technical report. Led by Ivan in collaboration with researchers from the University of Central Florida and the University of Maine, the project provides transportation agencies with practical guidance for deploying dynamic roadway messaging systems that help drivers respond more safely to changing weather conditions.
The study examined how real-time warnings and variable speed limits influence driver behavior using real-world traffic data, driving simulator experiments, and nationwide surveys. Researchers developed recommendations for effective message design, placement, and timing, along with implementation strategies that transportation agencies can use to improve roadway safety and reduce weather-related congestion.
According to the TRB feature, the research demonstrates the value of these intelligent transportation systems in improving safety and travel reliability during severe weather. The highlighted report notes that agencies using variable speed limits and real-time warning systems have observed measurable improvements in driver behavior and roadway safety, including significant crash reductions in some deployments.
The recognition brings national attention to research conducted at UConn that addresses one of transportation engineering's most persistent challenges: helping drivers travel more safely when weather conditions rapidly change. By translating research into practical guidance for state departments of transportation, the project supports more resilient and efficient roadway systems across the country.
