Bang Sue is the largest railway station in Southeast Asia, with 3 upper floors and 1 underground floor, 26 stations and 24 tracks. This will allow it to hold up to 40 trains at a time, with a capacity of 600,000 passengers per day, more than 10 times that of Hua Lamphong. The station was officially opened on August 2, 2021.

The layout of the station is divided as follows:

  1. Underground floor: Bang Sue MRT Station, on the MRT Blue Line station, and parking for 1,624 vehicles.
  2. Ground floor: Station concourse with ticketing and waiting areas. This will be the only air-conditioned area in the station.
  3. Second floor: Train platforms with 12 tracks. Eight tracks will serve long-distance diesel trains (soon to be electrified). Four tracks will serve SRT Red Dark and Light Red Line commuter trains.
  4. Third floor: High–speed railway platforms with 10 tracks. Four tracks will serve the AERA1 City and the Don Mueang–Suvarnabhumi–U-Tapao high-speed railway linking Don Mueang International Airport, Suvarnabhumi Airport and U-Tapao International Airport. Six tracks are reserved for future high-speed rail (HSR) connections to Nong Khai, Padang Besar, Thailand and Chiang Mai.

According to Wikipedia.