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Yellow Line (Bangkok)

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MRT Yellow Line
สายสีเหลือง
Overview
StatusUnder Construction
OwnerMass Rapid Transit Authority of Thailand
LocaleBangkok and Samut Prakan, Thailand
Termini
Stations23
Service
TypeMonorail
SystemMetropolitan Rapid Transit
Operator(s)Eastern Bangkok Monorail Company Limited
Rolling stockBombardier INNOVIA Monorail 300
4 cars per set
History
Planned opening1st Section: July 2022
Technical
Line length30.4 kilometers (18.9 mi) (est.)
Number of tracks2 monorail tracks
CharacterElevated
Electrification750 V DC
Operating speed80 km/h (50 mph)
SignallingBombardier CITYFLO 650 moving block CBTC ATC under ATO GoA 3 (DTO), with subsystems of ATP, ATS and CBI[1]
Route map

Legend
Blue Line
 Lat Phrao
 MRT 
Blue Line
 Phawana
Chok Chai 4
Lat Phrao 71
Lat Phrao 83
Mahat Thai
Lat Phrao 101
Bang Kapi
Yaek Lam Sali
 MRT 
Orange Line
 Si Kritha
Hua Mak
ARL
SRT
Airport Rail Link
Light Red Line
 Kalantan
Si Nut
Srinagarindra 38
Suan Luang Rama IX
Si Udom
Debaratana-Si Iam
Maintenance Center
 Si Iam
Si La Salle
Si Bearing
Si Dan
Si Thepha
Thipphawan
Samrong
 BTS 
Sukhumvit line
This diagram:

The MRT Yellow Line is an elevated mass rapid transit line currently under construction in Bangkok and Samut Prakan Province, Thailand. The 30.4 km line will have 23 stations and cost 55 billion baht.[2] The line was originally proposed in 2005 by the Office of Transport and Traffic Policy and Planning to be a heavy rail underground line along Lat Phrao rd and then elevated from Lam Sali junction to Samrong. However, it was decided in 2012 to build an elevated monorail line for the whole length in order to reduce construction costs.

The MRT Yellow Line will provide mass transit along the heavily congested Lat Phrao road and Srinagarindra road corridors. The line will link 6 other lines; the MRT Blue Line, interchange with the MRT Orange Line (which is under construction), the planned MRT Grey Line and MRT Brown Lines, the Airport Rail Link (Bangkok) and finally the BTS Sukhumvit Line. As such, it will be an important cross city link in the middle north-eastern and eastern areas of Bangkok.

Preliminary site works began in late 2017 with major construction work starting from March 2018. In October 2020, the BSR stated that they plan to open the first section of the MRT Yellow Line by October 2021 with initial operations running from Samrong (Y23) to Si Iam (Y17).[3] The full line was then planned to fully open in July 2022.[4] However, due to COVID-19 outbreaks in Bangkok delaying construction with sites closed, the BSR has stated that first section of the line will not open until July 2022.[5]

On 29 November 2021, daily testing began on a 6 km section of the line between the depot at Si Lam and Srinagarindra 38 station. Testing will be expanded after a 3-month period. By the end of January 2022, construction progress is at 91.24%.[6]

Route Alignment

The line starts at the intersection of Ratachadapisek and Lat Phrao roads where it interchanges with the MRT Blue Line at Lat Phrao station. The line then heads east along Lat Phrao road to Bangkapi junction where it will interchange with the MRT Orange Line Lam Sali station, before heading south along Srinagarindra Road to Hua Mark where it will interchange with the Airport Rail Link Hua Mak station.

From Hua Mark, the route continues south along Srinagarindra Road past Bangna-Trat Road all the way to Thepha Rak Road in Samut Prakan Province, then heading west along Thepha Rak Road before terminating at Samrong of the BTS Sukhumvit Line.[7]

The line will be built from Ratchada (Y1) to Samrong (Y23), with construction planned to take four years to complete. The Yellow Line depot will be located at Debaratana Road adjacent to Si Iam station.

History

The MRT Yellow line was first proposed by the Office of Transport and Traffic Policy and Planning (OTP) in 2004 as a heavy rail underground and elevated metro line as part of the 10 line metro plan which was taken to the February 2005 election. In 2009, it was suggested to change the line to an elevated monorail line as a cost saving measure. In December 2011, the MRTA was instructed by the MOT to divide the MRT Yellow Line into two phases for tender and construction purposes and to reduce land appropriation costs.[8] In June 2012, the MRTA contracted consultants to undertake detailed designs of the line. In February 2013, OTP stated that the tender for the MRT Yellow Line should be ready by late 2013 for tender in early 2014.[9] By August 2013, this timeline had changed to a mid-2014 tender date.[10]

However, similar to the MRT Pink Line, delays in finalising the technical requirements of the tender in relation to the selection of monorail rolling stock which determines the type of track to be constructed resulted in further delays. The subsequent political turmoil of late 2013 and early 2014 caused even more delay. Thereafter, the coup of May 2014 resulted in a new military administration and the tender being deferred for 2014 due to a review of all mass transit projects. The MRTA was instructed by the junta government to change to a PPP tender process which was subsequently not released until mid-2016. In early December 2016, BSR Joint Venture (comprising BTS Group Holdings which owns 75%, Sino-Thai Engineering and Construction - STEC, and Ratchaburi Electricity Generation Holding - RATCH), won the bid for the line. The BSR also won the bid for the MRT Pink Line.[11]

On June 16, 2017, the contract was signed for the project between the Mass Rapid Transit Authority of Thailand and BSR consortium. The BSR established the Eastern Bangkok Monorail Company Limited to operate the monorail. A proposed 2 station extension of the route north from the current Ratchada terminus to link to the BTS Sukhumvit Line Extension at Ratchayothin station has also been proposed by the BSR Joint Venture.[12] However, this extension is opposed by the MRT Blue Line operator BEM due to concerns regarding loss of revenue.[13]

Construction Progress

Construction of the MRT Yellow Line began in March 2018 with the BSR consortium establishing a number of preparation work sites along the Lat Phrao rd with the closure of lanes along this traffic dense east–west corridor. By August 2018, construction had expanded to along the Srinakarin rd section which is also where the depot will be built.[14] By 30 September 2018, overall construction had progressed to 9.61%.[15] At the end of March 2019, construction has progressed to 30.40%.[16] By the end of July 2019, civil construction had further advanced to 39.92%.[17] At the end of October 2019, construction had progressed to 45.88%.[18] By the end of January 2020, construction had progressed to 51.81%.[19] By the end of May 2020, construction had progressed to 59.42%.[20] At the end of July 2020, construction had progressed to 62.44%.[21] At the end of September 2020, was at 66.31%.[22] By the end of 2020, 1549 guide beams had been installed of the project total of 2388 individual guide beams. At the end of November 2020, construction had progressed to 70.64%.[23] Construction progress was 77.97% complete by the end of February 2021.[24] Construction progress had advanced to 82.46% complete by the end of April 2021.[25] Construction progress was 85.53% by the end of July 2021.[26] Construction progress was 88.14% by the end of October 2021.[27]

On 29 November 2021, daily testing began on a 6 km section of the line between the depot at Si Lam and Srinagarindra 38 station. Testing will be conducted at a maximum speed of 25 km/h. After 3 months, testing will be undertaken at higher speeds and expanded to a longer section of the line.[5]

By the end of January 2022, construction progress is at 91.24%.[28]

Rolling stock

BSR selected Bombardier INNOVIA Monorail 300 rolling stock for the MRT Yellow line.[29] The BSR has announced that they will purchase 28 4-car sets to operate the MRT Yellow line.[30] These trains will be manufactured at CRRC Puzhen Bombardier Transportation factory in Wuhu, Anhui, China. The first set has been assembled and was shipped on 4 September 2020 with delivery to Thailand at the end of September 2020.[31] The first set arrived in Thailand on 1 October at Laem Chabang port with a handover ceremony attended by the Thai Prime Minister, BTSC Chairman, MRTA and Canadian Ambassador.[32] Two more sets arrived in mid December for a total of 5 sets by the end of 2020. By July 2021, 8 sets had been delivered and were being tested.[33] As of the end of October 2021, 12 sets had been delivered.[5] By the end of November, the BSR stated that 20 sets had been delivered with the remaining sets expected to be fully delivered by the end of March 2022.[34]

Innovia Monorail 300, Line 15 (Silver), São Paulo Metro, Brazil

Technical Characteristics

  • Low profile vehicles/low floor height above beam[35]
  • Distinct sloped nose/end-cap
  • Inter-car walkthrough[35]
  • Rubber-tires and permanent magnet motor[35]
  • Aluminium body, steel underframe, composite end cap
  • 4-car sets have a capacity of 24,100 pax p/h each way and 8-car sets a capacity of 49.600 pax p/h each way with a 75-second headway.[36]
  • Innovia Monorails are all fully automated and are equipped with CITYFLO 650 communications-based train control for driverless operation to increase reliability, shorten head ways between trains and lower maintenance costs.[37]

The BSR has stated that the pax capacity for 4-car sets will be 17,000 p/h each way.[38]

Guidebeams

The Bombardier INNOVIA Monorail 300 operates on a narrow, elevated guidebeam. Pre-cast, post-tensioned guidebeams are constructed at an off-site location and later installed on the system. The guidebeams are 690 mm (27 in) wide.[35] The Innovia Monorail 300 was designed to navigate curves as tight as 46 m and a maximum grade of 6%. Monorail switches are either beam replacement or multi-position pivot switches.[39] The system will have evacuation walkways down the entire length of the guidebeam. These walkways allow passengers to escape any onboard hazard. The maintenance crew also uses these walkways for repairs and general maintenance to the system.[40]

List of planned stations

The 30.4 km Yellow Line will have 23 stations (with a proposed extension of two stations):[41]

Code Station Name Transfers Opening Province
YLEX-02 Phaholyothin 24 (proposed extension)  BTS  Phahon Yothin 24 July 2022 Bangkok
YLEX-01 Chankasem (proposed extension)
YL1 Lat Phrao  MRT  Lat Phrao
YL2 Phawana
YL3 Chok Chai 4
YL4 Lat Phrao 71
YL5 Lat Phrao 83  MRL  Chalong Rat (proposed)
YL6 Mahatthai
YL7 Lat Phrao 101
YL8 Bang Kapi
YL9 Yaek Lam Sali  MRT  Yaek Lam Sali (under construction)

 MRT  Chalong Rat (design phase)

YL10 Si Kritha
YL11 Hua Mak  SRT  Hua Mak (tender in 2022)
 ARL  Hua Mak
YL12 Khlong Kalantan
YL13 Si Nut
YL14 Srinagarindra 38
YL15 Suan Luang Rama IX
YL16 Si Udom
YL17 Si Iam (Depot)  BTS  (planned)
YL18 Si La Salle
YL19 Si Bearing Samut Prakan
YL20 Si Dan
YL21 Si Thepha
YL22 Thipphawan
YL23 Samrong  BTS  Samrong

Potential future extension

A proposed 2 station extension of the route north from the current Ratchada terminus to link to the BTS Sukhumvit Line Extension at Ratchayothin station has also been proposed by the BSR Joint Venture.[12] However, this extension is opposed by the MRT Blue Line operator BEM,[13] estimating about 988 million baht loss on the extension's first year of service and 2.7 billion baht throughout the 30-year concession period.[42]

The extension was approved in February 2021, with construction set to be completed in 2024.[43] However, EBM has repeatedly denied MRTA's request to provide a compensation for BEM, which may result in a cancellation of the extension if no decision has been made.[42][44]

When completed the Yellow Line will terminate at Samrong. A future extension from Samrong across the Chao Phraya River to link with the MRT Purple Line at Rat Burana was canvassed by the OTP in the early 2010s. However, the location and design of Samrong station excludes any further extension of the line west of Sukhumvit rd.

Network Map

See also

References

  1. ^ "Bombardier Projects in Mass-transit signalling" (PDF). Archived from the original (PDF) on 2021-11-23.
  2. ^ "MRTA Yellow Line project".
  3. ^ "เปิดไทม์ไลน์-ค่าตั๋ว รถไฟฟ้าไร้คนขับ "สายสีชมพู-เหลือง"". Prachachat. 1 October 2020.
  4. ^ Theparat, Chatrudee (30 October 2020). "Tangled lines". Bangkok Post. Retrieved 31 October 2020.
  5. ^ a b c "วิ่งทดสอบฉลุย! โมโนเรล 'สายสีเหลือง' ทำความเร็ว 80 กม./ชม. พร้อมบริการกลางปี 65". Manager Online. 30 November 2021.
  6. ^ name="https://www.facebook.com/photo?fbid=249503844034516&set=pcb.249506184034282 MRTA Press, 8 February 2022
  7. ^ MRTA route of the Yellow Line (In Thai) Archived 2013-11-21 at the Wayback Machine
  8. ^ "ฐานเศรษฐกิจ - Connecting Opportunity". Retrieved 27 August 2016.
  9. ^ "Archived copy". Archived from the original on 2013-12-16. Retrieved 2014-06-27.{{cite web}}: CS1 maint: archived copy as title (link)
  10. ^ http://www.manager.co.th/iBizChannel/ViewNews.aspx?NewsID=9560000105880
  11. ^ "BSR Joint venture wins rights for Bangkok's Yellow, Pink line MRTA construction". Bangkok Post. 7 December 2016.
  12. ^ a b "Junta to call bids for most infra projects - The Nation". The Nation. Retrieved 2017-06-17.
  13. ^ a b Author meeting with MRTA planning division on 7 August 2019 at MTRA Headquarters
  14. ^ "Construction of monorail lines gets ceremonial launch". Bangkok Post. 27 August 2018.
  15. ^ https://www.mrta.co.th/th/news/information/. MRTA Press, 12 October 2018
  16. ^ https://www.facebook.com/MRTA.PR/photos/a.1433440196872710/2214355752114480 MRTA Press, 12 April 2019
  17. ^ https://www.facebook.com/MRTA.PR/photos/a.1433440196872710/2293373100879411 MRTA Press, 16 August 2019
  18. ^ https://www.mrta.co.th/th/news/information/MRTA Press, 10 November 2019
  19. ^ https://www.facebook.com/MRTA.PR/photos/a.1409211292628934/2436659376550782 MRTA Press, 7 February 2020
  20. ^ https://www.facebook.com/MRTA.PR/posts/2526580167558702 MRTA Press, 4 June 2020
  21. ^ https://www.facebook.com/MRTA.PR/photos/pcb.2574152359468149/2574151689468216 MRTA Press, 5 August 2020
  22. ^ https://www.facebook.com/MRTA.PR/photos/pcb.2627818000768251/2627816464101738 MRTA Press, 8 October 2020
  23. ^ https://www.facebook.com/MRTA.PR/photos/pcb.2679457458937638/2679457252270992 MRTA Press, 8 December 2020
  24. ^ https://web.facebook.com/MRTA.PR/photos/pcb.2740967916119925/2741010242782359 MRTA Press, 8 March 2021
  25. ^ https://www.facebook.com/MRTA.PR/photos/pcb.2781073708776012/2781073418776041 MRTA Press, 7 May 2021
  26. ^ name="https://www.facebook.com/MRTA.PR/photos/pcb.2843740849175964/2843724672510915/ MRTA Press, 6 August 2021
  27. ^ https://www.facebook.com/MRTA.PR/photos/pcb.2910748802475168/2910746319142083/ MRTA Press, 8 November 2021
  28. ^ name="https://www.facebook.com/photo?fbid=249503844034516&set=pcb.249506184034282 MRTA Press, 8 February 2022
  29. ^ https://www.prachachat.net/news_detail.php?newsid=1497601230
  30. ^ http://www.manager.co.th/iBizChannel/ViewNews.aspx?NewsID=9600000055953
  31. ^ http://ah.sina.com.cn/news/2020-09-04/detail-iivhvpwy4950163.shtml ah.sina.com.au, 4 September 2020
  32. ^ "Bangkok monorail trains arrive". Railway Gazette. 2 October 2020.
  33. ^ https://www.facebook.com/TransportDailynews Transport Daily news, 22 July 2021
  34. ^ "วิ่งทดสอบฉลุย! โมโนเรล 'สายสีเหลือง' ทำความเร็ว 80 กม./ชม. พร้อมบริการกลางปี 65". Manager Online. 30 November 2021.
  35. ^ a b c d "ALWEG - Bombardier Innovia Monorail 300". The Monorail Society - Technical Page. The Monorail Society. Archived from the original on 2015-07-07.
  36. ^ http://mail.monorails.org/pdfs/INNOVIA%20300.pdf Bombadier Innovia 300 Technical Sheet
  37. ^ "Bombardier named systems supplier of the year - INNOVIA Monorail 300 system and CITYFLO 650 technology are winners in Sao Paulo". Purchasing B2B. Purchasing B2B. Archived from the original on 2015-07-13. Retrieved 2015-07-06.
  38. ^ "วิ่งทดสอบฉลุย! โมโนเรล 'สายสีเหลือง' ทำความเร็ว 80 กม./ชม. พร้อมบริการกลางปี 65". Manager Online. 30 November 2021.
  39. ^ "INNOVIA Monorail 300 System: a mass transport solution for the megacity of São Paulo" (PDF). CG/LA Infrastructure, Inc. CG/LA Infrastructure, Inc.
  40. ^ "URBAN MONORAIL TRACK". Monorail Australia. The Monorail Society.
  41. ^ "รายงานการเปลี่ยนแปลงรายละเอียดโครงการ ในรายงานการวิเคราะห์ผลกระทบสิ่งแวดล้อม (รายงานฉบับสมบูรณ์) โครงการรถไฟฟ้า สายสีเหลือง ช่วงลาดพร้าว - สำโรง" (PDF) (in Thai).
  42. ^ a b "BEMร้องขอค่าชดเชย ชี้รายได้หด/หลัง'สายสีเหลือง'วิ่ง". www.naewna.com (in Thai). 2021-03-22. Retrieved 2021-11-01.
  43. ^ "[Realist Post] อัพเดตสายสีเหลือง เตรียมเสนอ รฟม.อนุมัติเพิ่มส่วนต่อขยาย 2 สถานี เชื่อมรถไฟฟ้า 3 สาย". Facebook.{{cite web}}: CS1 maint: url-status (link)
  44. ^ "รถไฟฟ้า"สายสีเหลืองส่วนขยาย"ส่อแววแท้ง!". Facebook.{{cite web}}: CS1 maint: url-status (link)
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