MRTA pushes ahead with four new Bangkok rail projects

BANGKOK — The Mass Rapid Transit Authority of Thailand (MRTA) is moving forward with plans for four new rail transit projects in Bangkok, including the Brown, Silver, Grey and Blue lines, according to MRTA governor Kajpachon Udomthamphakdi.

The first project is the Brown Line connecting Khae Rai and Lam Sali (Bueng Kum), covering 22.1 kilometres. Kajpachon said the MRTA would continue to push ahead with the project as planned.

The second project is the Silver Line, a 19.7-kilometre light rail transit (LRT) route linking Bang Na and Suvarnabhumi Airport . The project is currently under review to improve integration with the airport terminal.

MRTA will also conduct a new environmental impact assessment (EIA), as the previous study is more than five years old. The review process is expected to begin within the next two to three months and take around one year.

Kajpachon said the third project, the Grey Line monorail connecting Watcharaphon and Thong Lo over 16.3 kilometres, is also being revised to better match current conditions. The proposal is expected to be submitted to the MRTA board in 2027.

The fourth project is the Blue Line monorail linking Din Daeng and Sathorn over 6.7 kilometres. MRTA expects studies for the route to begin after 2029 in line with priorities under the M-MAP2 transport development plan.