Repairing damage to the foundation and road surface of sections Km4+625 - Km4+633, Km4+823 - Km4+835, Km6+480 - Km6+720 of National Highway 9 Northern bypass and sections Km1+090 - Km2+250, Km2 +750 - Km2+840, Km3+060 - Km3+225, Km3+613 - Km3+850, Km7+450 - Km7+777, Km8+252 - Km8+466, Km8+805 - Km8+912 National Highway 9 avoid the South; Repair trenches along section Km0+00 - Km0+270 of National Highway 9 Northern bypass; Installing corrugated iron guardrails at sections Km3+360 - Km3+420, Km6+060 - Km6+090, Km6+980 - Km7+012, Km7+250 - Km7+400, Km8+216 - Km8+234, Km9+240 - Km9+270 and reinforcement of negative slope landslides at Km9+595 National Highway 9, Southern bypass; Strengthening the traffic safety system in sections passing schools on National Highway 9, Northern bypass and Southern bypass, Quang Tri province