The Department of Highways will start building a 5 km elevated road on Borommaratchachonnani Road (Phutthamonthon Sai 3 to Sai 4) in October 2026, in 6 contracts worth 4,386 million baht, due for completion in 2029. Traffic will be closed in phases, one lane each side beside the median at first, on a road carrying about 265,982 vehicles a day. If your business depends on deliveries or customer access along this corridor, plan alternative routes such as Phran Nok Road and Rama 2 now, and allow extra travel time through 2029.