Sukhumvit Line

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Sukhumvit Line
Bangkok Skytrain 2011.jpg
Skytrain approaching Nana Station
Type Medium-capacity rail transport system
System BTS Skytrain
Status Operational
Locale Bangkok, Thailand
Termini Mo Chit Station
Bearing Station
Stations 22
Daily ridership 600,000 (2012)
Opened December 5, 1999
Owner Bangkok Metropolitan Administration (BMA)
Operator(s) Bangkok Mass Transit System
Public Company Limited
Depot(s) Mo Chit
Rolling stock Siemens Modular Metro
Line length 22.25 km (13.83 mi)
(32 km under-construction)
Track gauge 1,435 mm (4 ft 8 12 in) standard gauge
Electrification Third rail
Operating speed 80 km/h (49.71 mph)
Route map
Khu Khot
Km. 25
Royal Air Force Museum
Bhumibol Hospital
Saphan Mai
Sai Yut
Lak Si
Wat Phra Si
11th Infantry Reg.
Bang Bua
Krom Pai Mai
Sena Nikhom
Satri Woranat
MRT Blue Line ( Bang Sue – Hua Lamphong )
Lat Phrao (MRT: Phahon Yothin)
Main depot
Mo Chit (MRT:Chatuchak Park)
Saphan Khwai
Sanam Pao
Si Rat Expressway
Victory Monument
Phaya Thai
ARL ( Suvarnabhumi )
SRT Eastern Line ( Bangkok – Chachoengsao )
Silom Line ( National Stadium – Saphan Taksin )
Chit Lom
Phloen Chit
Chaloem Maha Nakhon Expressway
MRT Blue Line: Sukhumvit ( Hua Lamphong – Bang Sue )
Phrom Phong
Thong Lo
Phra Khanong
Chalong Rat Expressway
On Nut
Bang Chak
Udom Suk
Chaloem Maha Nakhon Expressway
Bang Na
Pu Chao Saming Plai
Erawan Museum
Navy Academy
Samutprakarn City Hall
Prak Sa
Sai Luad
Keha Samutprakarn

The Sukhumvit Line (Thai: รถไฟฟ้าบีทีเอส สายสุขุมวิท), a route of the BTS Skytrain in Bangkok, Thailand. From the central Siam Station, where it connects with the Silom Line, the elevated rail line runs northwards along Phaya Thai and Phahon Yothin Roads to Mo Chit Station (N8) in Chatuchak District, and eastwards along Rama I, Phloen Chit and Sukhumvit Roads to Bearing Station (E14) in Bang Na District.

The line originally consisted of seventeen stations (from Mo Chit to On Nut) when the BTS first opened in December 1999. A planned station at N6 has never been built.

The line is represented on the official BTS map in light green.


BTS Sukhumvit.jpg
Code Station Name
Station Name
Transfers Location
N8 Mo Chit หมอชิต  Blue Line  Bangkok Chatuchak
N7 Saphan Khwai สะพานควาย Phaya Thai
N5 Ari อารีย์
N4 Sanam Pao สนามเป้า
N3 Victory Monument อนุสาวรีย์ชัยสมรภูมิ  Light Red Line  (2019) Ratchathewi
N2 Phaya Thai พญาไท  Airport Rail Link   SRT   Light Red Line  (2019)
N1 Ratchathewi ราชเทวี
CEN Siam สยาม  Silom Line   Chula-Siam Monorail  (2029) Pathum Wan
E1 Chit Lom ชิดลม
E2 Phloen Chit เพลินจิต  Light Blue Line  (2029)
E3 Nana นานา Watthana
Khlong Toei
E4 Asok อโศก  Blue Line 
E5 Phrom Phong พร้อมพงษ์
E6 Thong Lo ทองหล่อ
E7 Ekkamai เอกมัย
E8 Phra Khanong พระโขนง
E9 On Nut อ่อนนุช
E10 Bang Chak บางจาก Phra Khanong
E11 Punnawithi ปุณณวิถี
E12 Udom Suk อุดมสุข Bang Na
E13 Bang Na บางนา
E14 Bearing แบริ่ง

Extensions and current construction[edit]


1st extension - Construction started in August 2006 of a 4 billion baht, 5.25 km extension from On Nut (E9) to Bearing.[1] The extension was funded by the BMA.[2] The original scheduled opening date was mid-2009. However, an unusual delay in tendering of the contract for the electrical and signals resulted in a 2-year delay. "The senior City Hall official responsible for making the purchase has apparently stalled the scheme over fears of being investigated if something went wrong with the purchase, he said. The official in question is due to retire and does not want to take risks despite being told the scheme is strictly in line with regulations, said Mr Teerachon".[3]

The BTSC was contracted by the BMA to run the extension. Subsequently, the extension did not open until over 2 years later on 12 August 2011. The delay in opening prompted the BMA to offer free travel for this extension until the end of 2011 as compensation. A flat fare is charged for this section. The fee for this extension is separate from the distance based fare of the rest of the BTS network.

2nd extension, currently under construction - Construction started in April 2012 for a 12.6 km, 7 station extension from Bearing Station to Samut Prakhan Station. 2 stations (E18 & E22) will be built at a later date. The extension is funded by the MRTA as it is outside BMA city limits, Bangkok Province. Construction is contracted to take 1,350 days and the extension is planned to open in 2017. In April 2013, the MRTA awarded Ch Karnchang the contract for track laying and electrical systems.[4] As of June 2014, civil works were stated to be 28.30% complete.

Code Station Name
Station Name
Transfers Location
E15 Samrong สำโรง  Yellow Line  (2019) Samut Prakan Mueang Samut Prakan
E16 Pu Chao Saming Phrai ปู่เจ้าสมิงพราย
E17 Erawan Museum พิพิธภัณฑ์ช้างเอราวัณ
E18 Naval Academy โรงเรียนนายเรือ
E19 Samut Prakan City Hall ศาลากลางจังหวัดสมุทรปราการ
E20 Srinagarindra ศรีนครินทร์
E21 Phraek Sa แพรกษา
E22 Sai Luat สายลวด
E23 Kheha Samut Prakan เคหะสมุทรปราการ


  • 1) Mo Chit station to Saphan Mai: 11.4 km, 12 stations (N9–N20). (Contract signed)
  • 2) Saphan Mai to Khu Khot: 7.5 km, 4 stations (N21-N24). (Contract signed))
  • 3) Khu Khot to Outer Eastern Ring (Lam Lukka rd): 9 km, 4 stations (N25-N29). (Planned)

A 11.4 km, 11 station northern extension from Mo Chit Station to Saphan Mai in Don Mueang District has been planned since the Sukhumvit Line opened. Originally, this extension was scheduled to be completed by 2008. However, due to a combination of changes in government, a prolonged EIA study and problems with locating a suitable train depot the extension has been continually delayed.

A further 16.5 km, 9 station extension from Saphan Mai to Lam Lukka was also planned once the extension to Saphan Mai had been completed. This was subsequently split into two extensions. A 7.5 km, 4 stations extension to Khu Khot and a 9 km, 4 stations extension along Lam Lukka Rd to the Outer Eastern Ring Rd.

Due to the significant delay in the northern extension plans, in mid-2013 it was decided to tender extension (1) and (2) at the same time by the end of 2013. However, the dissolution of parliament in November 2013 delayed this yet again. A tender was finally released in January 2014 [5] with an April deadline before being delayed until late May 2014 due to concerns from bidders.[6]

A military coup in late-May suspended the bidding process whilst the military administration reviewed all major projects. In late June, the military administration affirmed the tender which will proceed before the end of 2014. In mid-August, the MRTA announced that the new tender deadline will be 30 September 2014.[7] 5 bidders have qualified and successful bids will be announced by December.[8] It is envisaged that construction will commence by early 2015. The tender specifies a construction period of 1,350 days.

On 3 April 2015, MRTA signed four contracts of this extension, the construction are expect to start in June, 2015.[9]

  • Contract 1 Civil works of 11.4 km. from Mo Chit to Saphan Mai, will be construct by Italian-Thai Development (15,269 million Baht)
  • Contract 2 Civil works of 7.5 km. from Saphan Mai to Khu Khot, will be construct by UN-SH-CH Joint Venture (6,657 million Baht)
  • Contract 3 Civil works of Depot and Park & Ride building, will be construct by STEC-AS Joint Venture (4,019 million Baht)
  • Contract 4 Track Laying and system design, will be construct by STEC-AS Joint Venture (2,841 million Baht)

After MRTA, Contactor (1,2) and Thai Metro Police had meeting on 2 September 2015. They finally decided to begin actual construction on 8 September 2015 and 'Kasetsart Bridge' will be demolished on 12 September 2015 which will take 60 days to complete. [10]

Code Station Name
Station Name
Transfers Location
N24 Khu Khot คูคต Pathum Thani Lam Luk Ka
N23 Km. 25 กม. 25 Bangkok Don Mueang
N22 Royal Air Force Museum พิพิธภัณฑ์กองทัพอากาศ Sai Mai
N21 Bhumibol Hospital โรงพยาบาลภูมิพลอดุลยเดช
N20 Saphan Mai สะพานใหม่ Bang Khen
N19 Sai Yut สายหยุด
N18 Wongwian Lak Si วงเวียนหลักสี่
N17 Wat Phra Sri Maha That วัดพระศรีมหาธาตุ  Pink Line  (2019)
N16 11th Infantry Regiment กรมทหารราบที่ 11
N15 Bang Bua บางบัว Chatuchak
N14 Krom Pa Mai กรมป่าไม้
N13 Kaset Sart เกษตรศาสตร์  Brown Line  (2019)
N12 Sena Nikhom เสนานิคม
N11 Ratchayothin รัชโยธิน
N10 Phaholyothin 24 พหลโยธิน 24
N9 Lat Phrao Intersection ห้าแยกลาดพร้าว  Blue Line 

Future extension plans[edit]


  • A further 7 km, 4 station extension from Kheha Samut Prakan Station to Bang Pu Station is planned. It may be tendered by 2015-2016 for completion by 2019-2020.
Code Station Name
Station Name
Transfers Location
E24 Sawangkhaniwat สวางคนิวาส
E25 Mueang Boran เมืองโบราณ
E26 Sichanpradit ศรีจันทร์ประดิษฐ์
E27 Bang Pu บางปู


  • A further 9 km, 4 station extension east along Lam Lukka Rd from Khu Khot Station to Eastern Outer Ring Station is planned to be constructed by 2029.
Code Station Name
Station Name
Transfers Location
N28 Eastern Outer Ring วงแหวนรอบนอกตะวันออก Pathum Thani Lam Luk Ka
N27 Khlong Ha คลองห้า
N26 Khlong Si คลองสี่
N25 Khlong Sam คลองสาม

See also[edit]


  1. ^ Groundbreaking starts on new BTS extension, Dailynews, 15 August 2006
  2. ^ BTS extension budget cut, Bangkok Post, 15 December 2006
  3. ^ Skytrain link tests delayed, Bangkok Post, 19 September 2009
  4. ^ "Ch Karnchang gets Phase 2 of Bearing-Samut Prakan route" The Nation, 13 April 2013
  5. ^
  6. ^ "รฟม.ปรับทีโออาร์หมอชิต-คูคต กลางปี59 เปิดให้บริการสายสีม่วง" Prachachat News, 26 May 2014
  7. ^
  8. ^
  9. ^
  10. ^

External links[edit]