Since 2012, the Bang Sue-Taling Chan section of the Light Red Line has been constructed. Bidding is expected to be called soon for the Bang Sue-Rangsit section of the Dark Red Line to be financed by the Japanese loan.
Most of the railway will run alongside existing national railway tracks, eventually replacing them. Sections running through inner-city areas will be elevated, and the system will be electrified by overhead lines. The State Railway of Thailand is the project owner and operator of the route.