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LED Warning Lights Cut Speeds, Boost Road Safety

12/2/2025

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Summary

Story summary

The study on M-32 near Gaylord found flashing LED lights on curve warning signs reduced average speeds by 1.5 mph for eastbound and 0.9 mph for westbound drivers under adverse conditions.
The study was funded by the Michigan Department of Transportation (MDOT) and seeks to reduce accidents on slippery curves, which account for over 25% of fatal crashes.
MDOT plans to implement the technology at high-risk locations and explore others.

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Story summary

The study on M-32 near Gaylord found flashing LED lights on curve warning signs reduced average speeds by 1.5 mph for eastbound and 0.9 mph for westbound drivers under adverse conditions.
The study was funded by the Michigan Department of Transportation (MDOT) and seeks to reduce accidents on slippery curves, which account for over 25% of fatal crashes.
MDOT plans to implement the technology at high-risk locations and explore others.