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.
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.