Sukhumvit Line

BTS Sukhumvit Line รถไฟฟ้าบีทีเอส สายสุขุมวิท
Skytrain approaching Nana Station
Overview
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)
Operation
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
Technical
Line length	22.25 km (13.83 mi) (32 km under-construction)
Track gauge	1,435 mm (4 ft 8 ^1⁄2 in) standard gauge
Electrification	Third rail
Operating speed	80 km/h (49.71 mph)
Route map Legend 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 Kasetsart Sena Nikhom Ratchayothin Satri Woranat MRT Blue Line ( Bang Sue – Hua Lamphong ) Lat Phrao (MRT: Phahon Yothin) Don Mueang Tollway Main depot Mo Chit (MRT:Chatuchak Park) Saphan Khwai Ari Sanam Pao Si Rat Expressway Victory Monument Phaya Thai ARL ( Suvarnabhumi ) SRT Eastern Line ( Bangkok – Chachoengsao ) Ratchathewi Silom Line ( National Stadium – Saphan Taksin ) Siam Chit Lom Phloen Chit Chaloem Maha Nakhon Expressway Nana Asok MRT Blue Line: Sukhumvit ( Hua Lamphong – Bang Sue ) Phrom Phong Thong Lo Ekkamai Phra Khanong Chalong Rat Expressway On Nut Bang Chak Punnawithi Udom Suk Chaloem Maha Nakhon Expressway Bang Na Bearing Samrong Pu Chao Saming Plai Kanjanapisek Expressway Erawan Museum Navy Academy Samutprakarn City Hall Srinakarindra 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.

Stations

Code	Station Name English	Station Name Thai	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

East

1st extension - Construction started in August 2006 on a four 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 two 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 two 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 on a 12.6 km, seven station extension from Bearing Station to Samut Prakhan Station. Two stations (E18 and 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 28.3 percent complete.

Code	Station Name English	Station Name Thai	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

North

• 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, four stations (N21-N24). (Contract signed))
• 3) Khu Khot to Outer Eastern Ring (Lam Lukka rd): nine km, four 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, nine 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, four stations extension to Khu Khot and a nine km, four station 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 2014 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] Five bidders have qualified and successful bids will be announced by December 2014.^[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 for 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 constructed by Italian-Thai Development (15,269 million baht)
• Contract 2: Civil works of 7.5 km from Saphan Mai to Khu Khot, will be constructed by UN-SH-CH joint venture (6,657 million baht)
• Contract 3: Civil works of Depot and Park and Ride building, will be constructed by STEC-AS joint venture (4,019 million baht)
• Contract 4: Track laying and system design, will be constructed by STEC-AS joint venture (2,841 million baht)

MRTA, contactors (1,2) and Thai Metro Police met on 2 September 2015. They decided to begin 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 English	Station Name Thai	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

East:

• A further 7 km, four 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 English	Station Name Thai	Transfers	Location
E24	Sawangkhaniwat	สวางคนิวาส
E25	Mueang Boran	เมืองโบราณ
E26	Sichanpradit	ศรีจันทร์ประดิษฐ์
E27	Bang Pu	บางปู

North:

• A further 9 km, four 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 English	Station Name Thai	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

• Airport Rail Link (Bangkok)
• BTS Skytrain
• MRT Blue Line
• Bangkok Metro
• MRT Brown Line
• MRT Grey Line
• MRT Light Blue Line
• MRT Orange Line
• MRT Pink Line
• MRT Purple Line
• MRT Yellow Line
• SRT Red Lines
• Bangkok BRT
• Lists of rapid transit systems

References

1. Groundbreaking starts on new BTS extension, Daily News, 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. http://www.mrta.co.th/sysRegister/register131217/proc17122556.pdf
6. http://www.prachachat.net/news_detail.php?newsid=1401076541 "รฟม.ปรับทีโออาร์หมอชิต-คูคต กลางปี59 เปิดให้บริการสายสีม่วง" Prachachat News, 26 May 2014
7. http://www.prachachat.net/news_detail.php?newsid=1408439328
8. http://www.matichon.co.th/news_detail.php?newsid=1412581507
9. http://www.ryt9.com/s/iq03/2130477
10. http://www.manager.co.th/iBizchannel/ViewNews.aspx?NewsID=9580000099688

External links

• "MRTA Greenline website"
• "2Bangkok BTS Light Green Line - Bearing to Paknam - south extension, construction thread" Semi-regular updates, articles, pictures and commentary (In English)
• "2Bangkok BTS Light Green Line - Mo Chit to Khoo Khot - north extension thread" Semi-regular updates, articles, pictures and commentary (In English)
• Airport Rail Link, BTS, MRT & BRT network map