The signs flashed late Wednesday and into early Thursday, warning drivers of a new winter storm watch for the area. But the National Weather Service had issued no such watch.
The Georgia Department of Transportation says in a statement that in an effort to inform motorists of potentially hazardous road conditions, it overreacted to a statement from the weather service and posted incorrect information on message signs from 10:30 p.m. Wednesday to 5:30 a.m. Thursday.
National Weather Service forecasters called state officials early Thursday to alert them to the error.
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