The hail storm that moved through the Greater Danbury area last night wreaked havoc on the roads.  New Milford Police cautioned drivers that the sleet and rain caused slippery road conditions.  The Department of Public Works was out treating the roads, but motorists were urged to allow extra time while out driving last night.  Brewster Fire Department officials say the road conditions deteriorated rapidly.  The icy and slick roads caused multiple accidents in Putnam County last night.