At least a half-dozen fender-benders were reported on the Clark Bridge this morning, sending a handful of people to the hospital with minor injuries.  The cause of the wrecks is thought to be black ice - a phenomena that happens when the temperature drops below freezing and the moisture on the pavement forms a nearly invisible sheen of ice.

Alton Police Lieutenant David DeWall says if you find yourself sliding on black ice, there's a few things you can do.

DeWall comments

Bridges and overpasses are traditionally the first to re-freeze when there's water on the pavement because the cold air can also get under the road, cooling it quicker.  This morning's series of accidents had traffic backed up for a large part of the morning rush.

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