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Dec. 4, 2025
On this week’s edition of the Talking Michigan Transportation podcast, a conversation about a new study that confirms that flashing LED lights, used strategically, can improve safety on curves.
The study is part of a larger project looking for effective speed warning technologies, said Timothy Gates, a professor of civil and environmental engineering at Michigan State University, who talked about the findings on the podcast.
The research is funded by the Michigan Department of Transportation (MDOT).
The state tallied 128,517 crashes on curved roadways during winter weather conditions between 2018 and 2022, causing 175 serious injuries and fatalities, plus 1,360 less serious and suspected injuries, the study said.
The study concluded that curves on flat roads (called horizontal curves by highway engineers) "present a major challenge to drivers, especially when there is a significant difference between the posted speed limit and the curve advisory speed."
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