The Uttraphimuk Elevated Motorway Project (Rangsit-Bang Pa-In Section, M5) is a flagship initiative under the initial ten-year development plan (2017-2026). The project aims to enhance the efficiency and capacity of Thailand's transportation network and accommodate the anticipated growth in traffic demand. It is specifically intended to ease severe congestion along Phahonyothin Road (Highway No. 1) to the north of Bangkok-especially during peak periods-and to strengthen the crucial highway connection between the northern outskirts of the capital and adjacent provinces such as Pathum Thani and Phra Nakhon Si Ayutthaya.It will also facilitate long-distance regional traffic traveling into Bangkok. Upon completion of the Bang Pa-In-Nakhon Ratchasima Intercity Motorway Project (M6), the M5 will serve as a key strategic corridor, offering direct, safe, and efficient connectivity between Bangkok and the northeastern region, thereby contributing to the enhancement of national logistics efficiency and economic competitiveness. Accordingly, the Department of Highways (DOH) is proceeding in accordance with the Public-Private Partnership (PPP) Act, B.E. 2562 (2019), to invite private participation from entities with expertise in construction technology, infrastructure innovation, and operational management. The project will be implemented arrangement and is targeted to commence full operations by B.E. 2574 (2031).