Repairing damage to the background, road surface and drainage systems of Km299+00 - km300+500; Km303+00 - Km304+069; Km304+408 - Km310+200; Handling positive taluy subsidence at km302+900; Repairing and perfecting the traffic safety system according to QCVN 41: 2019/BGTVT (including school sites), Highway 16, Nghe An Province