FARGO — North Dakota authorities are warning drivers that black ice may be present on many roads, especially in high traffic areas.
Black ice forms from the moisture tracked onto roads by vehicles and their exhaust systems. When temperatures drop rapidly, the moisture freezes into a smooth, nearly invisible surface, the North Dakota Department of Transportation and the North Dakota Highway Patrol said in a news release Tuesday, Jan. 29.
Crews are working to improve road conditions, but extremely cold temperatures reduce the effectiveness of de-icers, the release stated. Abrasive material such as sand can provide temporary traction, and crews can use equipment to scrape ice and compacted snow.