With the opening of the MRT Purple Line between Tao Poon and Khlong Bang Phai, there is a missing link to the rest of the Bangkok Metro network as the section of the MRT Blue Line between Tao Poon and Bang Sue has not been completed.
As a replacement, there are free shuttle trains on top of free shuttle buses plying between Bang Sue and Bang Son until the missing link is completed. The free shuttle trains operate only on weekday peak hours at 15-minute intervals.
The free shuttle train service is provided by SRT with British Rail Class 158/T Sprinter DMUs.
Connect to the MRT Purple Line at Bang Son MRT Station.
The free shuttle train service between Bang Sue and Bang Son operate during weekday peak hours only, from 6.30am to 9.30am and again from 4.30pm to 8.30pm, operating at 15 minute intervals. The boarding location is the same as the waiting area for the free shuttle buses at Bang Sue Railway Station Platform 1.