Project audit: Repair of foundation, road surface, curb and drainage ditch along Km7+800÷Km9+336, Km9+439÷Km9+893, Km9+965÷Km10+000, Km10+353÷Km11+ 000, Km11+102÷Km11+192, Km11+300÷Km11+522 and handle unsafe traffic locations Km9+850, Km10+ 100, Km11+310, National Highway 15D, Quang Tri province