Black Ice Causing Hazard on Roads in Lakes Area

Photo taken by Minnesota State Patrol PIO Jesse Grabow

(KNSI/KDLM) – Driver’s are being warned about the dangers of black ice as the Lakes Area is plunged into another deep freeze.

The Minnesota Department of Transportation says black ice is an invisible hazard that catches drivers off-guard and causes crashes. Officials say black ice creates the appearance of a wet surface but is actually a thin, transparent layer of ice on roads and bridges.

Black ice forms when melting snow refreezes or when rain, drizzle, mist or fog freezes. It is most common at night and early morning when it is dark and temperatures are lowest.

Black ice often forms in tunnels and other shaded areas, on overpasses and bridges, and near lakes and rivers. The hazard can also form when snow temporarily melts from auto exhaust emissions or tire heat and from moisture vapors given off by industries located close to the highway.

Motorists should remember to slow down on bridges, overpasses, tunnels and on all roads in the early morning when the air temperature rises faster than the pavement temperature. Avoid applying brakes on ice as it may cause a vehicle to skid and never use cruise control during winter driving conditions.