There has been speculation for some time that the members have been under pressure to resign, as the minister reportedly wants to reconstitute the board.
The current board still has some key projects to handle.The ministry has set October 15 as the deadline for the consortium led by Thai conglomerate Charoen Pokphand (CP) group to sign a contract with the SRT to build the high-speed railway linking three major international airports.
The CP-led consortium had proposed the lowest price in the bid, but it would be deemed as abandoning the project if it failed to sign the contract with the SRT on that date.