Project: Repairing and supplementing the traffic safety system on the segment of Km0-Km90 belonging to QL.4G, on the segment of Km27-Km80+715 of National Road. +300 belongs to QL.12, on the segment of km28+300-km105+750 of QL.279D, on QL.37 and QL.32B, Son La province (without coinciding with projects repairing projects, road surfaces and works On the route in 2025)