SRT Light Red Line

Bang Son Commuter station on SRT Light Red Line

The contract for the initial stages from Taling Chan to Bang Sue was signed on December 15, 2008, with the contract awarded to the Unique-Chun Wo consortium.[6] Construction started in early 2010 but was delayed for a few months due to the late 2011 floods in Bangkok which inundated the route. Construction was completed by the 3rd quarter of 2012. Testing began in September 2012 for a 3-month period.[7] Bang Sue–Taling Chan Rail Electrification included in Contract 3 of SRT Dark Red Line Bang Sue - Rangsit which is under construction. Electrification will be completed by 2020. By the end of September 2019, Electrical and Signalling installation was at 45.60%.[8]

Two additional stations on either side of the Chao Praya river have been approved to be built, at Rama 6 bridge and Bang Kruay (EGAT).[9] However, as of June 2019 no contracts have been tendered to build these two stations.

The SRT Light Red Line is planned to be extended by 12 km west to Salaya.[17] 4 stations are planned be built along the existing SRT corridor;[18] 1) Ban Chimplee station, 2) Kanchanaphisek (Phutthamonthon Sai 2), 3) Sala Thammasob, 4) Salaya.

This western extension Taling Chan to Salaya was expected to be tendered by September 2018.[19] However, this section to Salaya may now be tendered in the 2nd half of 2019. [20]

There will be stations at Ratchawithi, Phaya Thai, Makkasan and Hua Mak.

The Construction seems to start late than expected due to late completion of Bang Sue Central Station and narrow right of way. Thus, SRT needs to reconsider construction methods to reduce an effect to rail service when the construction begins.[21]

The SRT operates existing intercity services from Thonburi station to Kanchananburi. This line is planned to be converted to a spur line of the existing Light Red line, from Taling Chan to Thonburi/ Siriraj.

In August 2012, the SRT proposed that 3 stations be built for this 6.5 km route:[22]

1) Talingchan Floating Market station at Bang Ramad, 2) Charansanitwongse station (interchange with the MRT Blue Line) 3) Thonburi/Siraraj station (interchange with the MRT Orange Line)

It is worth noting that originally the Orange Line was planned to be built along this alignment to Taling Chan. As of December 2017, no final approval had been granted to construct this spur line with the extension to Salaya being the priority.