The 21.6 km, 6 station (2 to be built later) Rangsit to Bang Sue section finally started construction in May 2013 after new contracts were signed in January 2013 [REF].
In June 2014, the SRT requested an additional 8.14 billion baht to modify the Dark Red line to 4 tracks instead of 3, to accordingly redesign all stations and to provide for the longer platforms for the Bang Sue Terminal to cater for future HSR lines [REF].