Project: Repairing damage to the foundation, road surface, works on the segment of Km105+973-Km110+978; Handling small radius curves to ensure traffic safety on the segment of Km22+200- Km22+500; Repairing and strengthening traffic safety in some school positions (Km6+740; Km11+890; Km12+592; Km46+551; 590+598) on QL.4G, Son La Province