Silom line

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Silom line (Thai: สายสีลม) or Dark Green line, is a route of the BTS Skytrain in Bangkok, Thailand. It runs eastward from the National Stadium Station in Pathum Wan District over Rama I Road and interchanges with the Sukhumvit line at Siam BTS station, then turns southward, following Ratchadamri, Si Lom, Narathiwat Ratchanakharin and Sathon Roads to Taksin Bridge where it crosses the Chao Phraya River and terminates at Bang Wa Station in Phasi Charoen District.

Silom line
Bangkok Skytrain 06.jpg
Native nameสายสีลม
TypeRapid transit
SystemBTS Skytrain
TerminiNational Stadium
Bang Wa
Opened5 December 1999
Depot(s)Mo Chit, Bang Wa
Line length14.5 km (9.0 mi)
Number of tracks2
Track gauge1,435 mm (4 ft 8 12 in)
ElectrificationThird rail
Route map

National Stadium
 BTS  (Up arrow Mo Chit – Bearing Down arrow)
 MRT : Si Lom (Left arrow Hua Lamphong – Tao Poon Right arrow)
Sala Daeng
Chong Nonsi
Bangkok BRT logo.svg
Sueksa Witthaya (Under construction)
Si Rat Expressway
Saphan Taksin
Chao Phraya River
Krung Thonburi
 SRT  (planned): (Hua Lamphong Up arrow)
 MRT  (planned): (Left arrow Khlong Bang Phai – Rat Burana Right arrow)
Wongwian Yai
Pho Nimit
Talat Phlu
SRT Maeklong Railway ( SRT  planned): (Maha Chai Down arrow)
Bang Wa
 MRT : (Left arrow Lak Song – Tao Poon Right arrow)
Light Depot


Originally consisting of seven stations from National Stadium (W1) to Saphan Taksin (S6) when the BTS first opened 5 December 1999. A planned station at S4 was not built but is under construction as of 2019.[1][2]. Its formal name is The Elevated Train in Commemoration of HM the King's 6th Cycle Birthday 2nd line .

Extensions and current constructionEdit

A 2.2 km extension across the river to Wongwian Yai (S8) opened 15 May 2009 after many years of delay. Originally, this extension was due to open in 2007.

A further 5.3 km, 4 station extension from Wongwian Yai (S8) to Bang Wa (S12) in Phasi Charoen District was delayed for many months by the Bangkok floods of late 2011.

The first station of extension, Pho Nimit (S9) opened on 12 January 2013. The second station of the extension, Talat Phlu (S10) opened on 14 February 2013. The extension was initially operated by a separate 6 car shuttle service due to the absence of a turnout between Wongwian Yai (S8) and Talat Phlu (S10).

The remaining two stations Wutthakat (S11) and Bang Wa (S12) were opened on 5 December 2013.

Future extension plansEdit

South: After the opening of Wutthakat (S11) and Bang Wa (S12) stations 5 December 2013, the BMA announced a new proposal to further extended the Silom line by 7 km from Bang Wa (S12) station, by six stations to Taling Chan.[3] Here, it would connect with the SRT Light Red line.

A public hearing was held in 2015.[4] Three route options were considered, with construction planned to start in 2017.[5] However, as of August 2018, no plan has been finalised. Part of the basis for this further extension by the BMA is that it would provide proximate access to the Southern Bus Terminal. This proposal in currently under preliminary study by the BMA.

West: The Silom line is planned to be extended by two stations west from National Stadium (W1) to link with the SRT Dark Red line at Yot Se station. However, no time frame for this extension has been announced and this section of the Dark Red line will not be built until after 2022.

Originally, the plan was to extend the Silom line west from National Stadium into Chinatown, then north to Democracy Monument where it would then run west to Rattanakosin Island and Sanum Luang, tunnel under the river to the Thonburi side before terminating at Phrannok. However, this plan was shelved back in 2009 and much of this route has been replaced by routing changes to the planned MRT Orange line.


Route map
Curved viaduct between Siam and Ratchadamri
Code Station Name
Station Name
Interchanges Location
  National Stadium สนามกีฬาแห่งชาติ Pathum Wan Bangkok
  Siam สยาม  BTS 
  Ratchadamri ราชดำริ
  Sala Daeng ศาลาแดง  MRT  Bang Rak
  Chong Nonsi ช่องนนทรี    MRL  Interchange with BRT
  Suksa Witthaya
(Under Construction, Open 2020)
ศึกษาวิทยา Bang Rak and Sathon
  Surasak สุรศักดิ์
  Saphan Taksin สะพานตากสิน Interchange with Chao Phraya Express Boat at Sathon Pier
  Krung Thon Buri กรุงธนบุรี  MRL  (under construction, opens 2020) Khlong San
  Wongwian Yai วงเวียนใหญ่  MRT  (approved)  SRT  (Planned)
  Pho Nimit โพธิ์นิมิตร Thon Buri
  Talat Phlu ตลาดพลู  [Interchange with BRT]
  Wutthakat วุฒากาศ  SRT  (Planned)[6] Thon Buri and Chom Thong
  Bang Wa บางหว้า  MRT  Phasi Charoen


  1. ^ "BTS to Add Two Stations Serving Downtown". Khaosod English. 4 November 2015. Retrieved 15 January 2016.
  2. ^ Charuvastra, Teeranai; Reporter, Staff (10 April 2019). "Construction of Sathorn BTS 'Ghost Station' Underway". Khaosod English. Retrieved 28 April 2019.
  3. ^ "One month free on metro between Taksin and Bang Wa". Thai Rath. 4 December 2013. Retrieved 4 September 2014.
  4. ^ "BTS Silom Line extension to Taling Chan moves forward". Coconuts Bangkok. 5 March 2015. Retrieved 4 December 2016.
  5. ^ "Skytrain looks West". Retrieved 4 December 2016.
  6. ^ "การรถไฟแห่งประเทศไทย State Railway of Thailand". Retrieved 3 April 2016.

External linksEdit

See alsoEdit