Thailand’s electric mass transit rail network is planned to reach a total length of 553.41 km across 33 routes, according to an update released by the Department of Rail Transport. As of early 2026, 279.84 km—around 50.6% of the planned network—is already operational in Bangkok and its surrounding metropolitan areas.
The operational system comprises multiple lines, including the Green Line (Mo Chit–Samut Prakan, Mo Chit–Ku Kot, and Sport Complex–Bang Wa sections), Blue Line (Bang Sue–Hua Lamphong, Bang Sue–Tha Phra, and Hua Lamphong–Bang Khae), Airport Rail Link, Purple Line (Bang Bua Thong–Taopoon), Gold Line, Red Line (Bang Sue–Rangsit and Bang Sue–Taling Chan), Yellow Line, and Pink Line (Khae Rai–Min Buri and Muang Thong Thani spur). Together, these routes form the core of Bangkok’s existing electric rail network.
Several major projects are under construction or scheduled for implementation. The Orange Line (Thailand Cultural Centre–Min Buri, 22.5 km) is targeted for opening in 2028, while the Purple Line southern extension (Taopoon–Ratchburana, 23.6 km) and the western section of the Orange Line (Cultural Centre–Bang Khun Non, 13.4 km) are planned for opening around 2030. In addition, two Red Line extensions—Siriraj–Taling Chan–Salaya (20.5 km) and Rangsit–Thammasat University Rangsit Campus (8.84 km)—are approved, with contracts expected to be signed and construction to commence in 2026.
Beyond these projects, a further 12 routes and extensions remain at the planning and approval stage, including the Airport Rail Link extension to Don Muang, additional Red Line and Blue Line links, and Green Line and Yellow Line extensions. Once fully completed, the expanded network is expected to improve urban connectivity, reduce road congestion, and strengthen public transport capacity across Bangkok and neighbouring provinces.