The extension began working in August last year when the stations between Mor Chit and Ha Yaek Lat Phrao were opened, followed by stations leading to Kasetsart University in December.
Phisak said the Green Line expansion project is being completed in line with the memorandum of understanding given to the Bangkok Metropolitan Administration.
He also said that the bridges removed to make way for the Green Line will be reinstalled, but not necessarily in exactly the same place.