Previously, it was expected to start service on December 5, 2016.
Sombat Kitjaluck, managing director of the company which will operate the new train line, said today that construction works have proceeded well.
BMCL is merged with Bangkok Expressway Plc to strengthen the financial position, ahead of the auction of more train lines.
The combined length of electric train in operations in Thailand is now 60 km. The Purple Line, the extended part of the Blue Line and the Green Line will extend the combined length by 70km.
Thailand plans to extend the total length to 500km. It is expected that the Cabinet would approve the construction of the Orange, Pink and Yellow lines within in the first quarter of this year, which will pave way for auctions later this year.