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2 JAN. 2014 -- FLORISSANT, Mo. -- Traffic passes beneath a dynamic message board operated by the Missouri Department of Transportation along I-270 near Florissant, Mo. in suburban St. Louis Thursday, Jan. 2, 2014. MoDOT uses the signs to advise motorists of road conditions, traffic congestion, traffic speeds and estimated arrival time at prominent interchanges, according to Tom Blair, MoDOT Assistant District Engineer. Photo © copyright 2014 Sid Hastings.