Sukhumvit Line

Sukhumvit Line
Overview
Native name	สายสุขุมวิท
Type	Heavy Rail
System	BTS Skytrain
Locale	Bangkok and Samut Prakan Province
Termini	Mo Chit Samrong
Stations	23
Operation
Opened	5 December 1999
Depot(s)	Mo Chit
Technical
Line length	23.10 km (14.35 mi)
Number of tracks	2
Track gauge	1,435 mm (4 ft 8 1⁄2 in)
Electrification	750V DC Third rail
Route map Khu Khot KM. 25 Royal Thai Air Force Museum Bhumibol Adulyadej Hospital Saphan Mai Sai Yud Laksi Monument Wat Phrasri Mahathat 11th Infantry Regiment Sri Pathum Royal Forest Department Kasetsart University Senanikhom Ratchayothin Phaholyothin 24  MRT  Blue Line ( Bang Sue – Hua Lamphong ) Ladphrao Intersection ( MRT : Phahon Yothin) Don Mueang Tollway Main depot Mo Chit ( MRT :Chatuchak Park) Saphan Khwai Sena Ruam (Future Station) Ari Sanam Pao Si Rat Expressway Victory Monument Phaya Thai  ARL  (Suvarnabhumi ) SRT Eastern Line ( Bangkok – Chachoengsao ) Ratchathewi  BTS  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 Third stage Expressway System Bang Na Bearing Samrong Pu Chao Kanjanapisek Expressway Chang Erawan Royal Thai Naval Academy Pak Nam Srinakarindra Phraek Sa Sai Luat Kheha

The Elevated Train in Commemoration of HM the King's 6th Cycle Birthday First line (Sukhumvit) or Sukhumvit line (Thai: รถไฟฟ้าบีทีเอส สายสุขุมวิท) is an elevated metro rail line of the BTS Skytrain in Bangkok, Thailand. From the central Siam Station, where it connects with the Silom Line, the line runs both northwards along Phaya Thai and Phahon Yothin Roads to Mo Chit station in Chatuchak District, and eastwards along Rama I, Phloen Chit and Sukhumvit Roads, through Bang Na District to Samrong Station in Samut Prakan.

When the BTS first opened in December 1999 the line consisted of seventeen stations from Mo Chit to On Nut, currently there are 23 stations in operation.

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

Stations

A planned station at N6 has never been built.

Code	Station Name English	Station Name Thai	Transfers	Location
N8	Mo Chit	หมอชิต	MRT	Bangkok	Chatuchak
N7	Saphan Khwai	สะพานควาย			Phaya Thai
N5	Ari	อารีย์
N4	Sanam Pao	สนามเป้า
N3	Victory Monument	อนุสาวรีย์ชัยสมรภูมิ			Ratchathewi
N2	Phaya Thai	พญาไท	ARL  ( SRT  planned)
N1	Ratchathewi	ราชเทวี
CEN	Siam	สยาม	BTS		Pathum Wan
E1	Chit Lom	ชิดลม
E2	Phloen Chit	เพลินจิต	( MRL  proposed)
E3	Nana	นานา			Watthana/ Khlong Toei
E4	Asok	อโศก	MRT
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	(proposed)		Bang Na
E13	Bang Na	บางนา
E14	Bearing	แบริ่ง
E15	Samrong	สำโรง	( MRL  Planned)	Samut Prakan	Mueang Samut Prakan

Extensions and current construction

Station sign at Thong Lo BTS Station shows the future expansion beyond Samrong, scheduled to open in 2018.

East

1st extension, in operation - 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, a delay in tendering of the contract for the electrical and signals resulted in a two-year delay. Deputy governor Teerachon Manomaiphibul commented: "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. 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".^[3] 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. An additional flat fee is charged additionally to 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, nine station extension from Bearing station to Kheha station. 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. In August 2016 the BMA agreed to take over the operation of the extension from MRTA. Delays over the agreement of how much the BMA should pay MRTA caused a delay in the commencement of test runs on the extension. Trackwork was 98% complete by November 2016. The total cost of the extension was estimated at 21.4 billion baht.^[5] In January 2017 it was announced that the opening of the extension could be further delayed to 2018-9 due to budgetary concerns,^[6] however the first station at Samrong opened in April 2017.^[7]

North

Map of North Extension at Thong Lo station. Station N9 will open in 2019 and stations N10 to N24 will open in 2020.

1st and 2nd extension, currently under construction

• 1) Mo Chit station to Saphan Mai: 11.4 km, 12 stations (N9–N20)
• 2) Saphan Mai to Khu Khot: 7.5 km, four stations (N21-N24)

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 environmental 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.

After many delays, 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 ^[8] with an April deadline before being delayed until late May 2014 due to concerns from bidders.^[9] 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.^[10] Five bidders qualified and successful bids were due to be announced by December 2014.^[11] The tender specifies a construction period of 1,350 days.

On 3 April 2015, MRTA signed four contracts for this extension:^[12]

• 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: Tracklaying and system design, will be constructed by STEC-AS joint venture (2,841 million baht)

The MRTA, contactors and Thai Traffic Police met on 2 September 2015 and confirmed construction would begin on 8 September 2015. A flyover at Kasetsart will need be demolished, which commenced on 12 September 2015.^[13]

Future extension plans

East:

• A further 7 km, four station extension from Kheha Samut Prakan station to Bang Pu station is planned.

North:

• A further 9 km, four station extension east along Lam Lukka Road from Khu Khot station to Eastern Outer Ring station is planned to be constructed by 2029.

See also

• Silom Line
• Airport Rail Link (Bangkok)
• BTS Skytrain
• MRT (Bangkok)
• SRT Red Lines
• Bangkok BRT
• Lists of rapid transit systems

References

External links

• "MRTA Greenline website"
• Airport Rail Link, BTS, MRT & BRT network map