Improving Winter Road Weather Alerts on Highway Dynamic Message Signs Status: CompleteReport Date: 04/02/2021 Summary: MnDOT maintains nearly 400 dynamic message signs (DMS) along the state’s highways. The Regional Transportation Management Center displays real-time messages to warn motorists of congestion, roadwork or an incident ahead that could be hazardous or cause a delay. DMS use to convey weather alerts has been limited to manually-entered blizzard alerts and other very isolated winter conditions. MnDOT has been concerned about the timeliness of weather messages and the chance that such messages could be overused, possibly leading motorists to take them less seriously. To make winter road weather alerts most effective, researchers developed a software interface to acquire weather alerts from the National Weather Service’s system and translate them into text messages for DMS. The system selects the appropriate DMS locations and posts the alert message until it expires. Operators can return to manually posting or removing alerts at any time. MnDOT intends to begin using this system for blizzard and snow squall alerts. The automatic option for DMS messages will enhance the timeliness and accuracy of DMS alerts for severe weather and allow RTMC operators to attend to other work. Final Deliverables: Improving Winter Road Weather Alerts on Highway Dynamic Message Signs (Other #2021-24) Related Materials: Improving Winter Road Weather Alerts on Highway Dynamic Message Signs (Blog Post) TRS: Road Weather and Creative Safety Messaging On Dynamic Message Signs (TRS) MnDOT to Issue Weather Warnings on Street Signs (News/Publication Article) New Project: Real-Time Winter Weather Alerts Planned for Highway Message Signs (blog) (News/Publication Article) Related Research: TRS: Road Weather and Creative Safety Messaging On Dynamic Message Signs Evaluation of Road Weather Messages on DMS Based on Roadside Pavement Sensors