Renewing corrosion damages on arch and pillars of concrete bridge Maslenica on A1 highway in Croatia Underside of an elevated roads Renewing corrosion damages on arch and pillars of concrete bridge Maslenica on A1 highway in Croatia road currently under construction at several levels to increase traffic Many bridges over river in sunset, Harrisburg, Pennsylvania, Susquehanna river crossings aerial view, dramatic evening reflection in water Casco Bay Bridge spans Fore River connecting South Portland and Portland in Maine.