Blue Line from Hua Lampong to Bang Kae launched for three month trial run   (Photo) PR PMC Consultant   Bangkok Expressway started a 3 month trial run of the extension of the Blue Line train service from Hua Lampong station to Bang Kae station on Thursday, according to the Ministry of Transport.   The Blue Line, between Taopoon terminal and Bang Kae is expected to be launched at the end of this month. Another extension of the same line from Taopoon to Tha Phra,