In the meeting held on 9 March 2010, the cabinet acknowledged the 8 February 2010 meeting approval of Mass Rapid Transit Master Plan in Bangkok Metropolitan Region by Land Traffic Management Commission. The Master Plan requires all related government agencies to implement respective first phase projects within 10 years - all services should be fully operate in 2019 - which consist of 7 MRT lines with a total length of 154 km and MRT Orange Line project is one of them.

      On 28 January 2020, the Cabinet has approved the implementation of the MRT Orange Line Project (Bang Khun Non – Min Buri (Suwinthawong) Section) (The Project) as a Public- Private Partnership (PPP) Net Cost scheme. The public sector will be responsible for land acquisition cost of the MRT Orange Line Project (West Section: Bang Khun Non – Thailand Cultural Centre), while the private sector will be invested in the civil works cost of the MRT Orange Line Project (West Section) and the mechanical and electrical (M&E) systems cost, rolling stocks, as well as system operation and maintenance (O&M) management for the entire route of the project, including the project’ s consultation expense. The System operation period will be 30 years starting from the commencement date of the commercial operation of the MRT Orange Line Project (East Section: Thailand Cultural Centre – Min Buri (Suwinthawong))