Winter makes curved roads dangerous. MSU researchers seek solutions

Winter — skid season — is almost upon us, making curves slipperier and more dangerous.

Now a new study done in northern Michigan shows that flashing LED lights on signs near curves can successfully warn drivers to slow down during wintry conditions.

Curves can be deadly.

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.

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.”

Navigating curves becomes more hazardous when snow and ice reduce pavement friction