Yellow Line (Bangkok)

The line starts at the intersection of Ratchadaphisek 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 Bang Kapi intersection and south to Lam Sali station to interchange with the MRT Orange Line and the future MRT Brown Line. The line continues further south along Srinagarindra Road to Hua Mak where it interchanges with the Airport Rail Link at Hua Mak station.

From Hua Mak, the route continues south along Srinagarindra Road past the Debaratna (Bang Na-Trat) Road all the way to Thepharak Road in Samut Prakan Province, then heading west along Thepharak Road where it terminates at Samrong and interchanges with Samrong of the BTS Sukhumvit Line.{{Cite news|url=https://www.mrta.co.th/pinkline/inno_02.html|title=MRT Yellow line Route |language=en}}

The line stretches from Lat Phrao (YL1) to Samrong (YL23) and the depot is located at Debaratana Road adjacent to Si Iam station (YL17).

The Yellow line was first proposed in the mid-1990s as a monorail line by Japanese consultants with little or no progress for 10 years. In 2004, the Office of Transport and Traffic Policy and Planning (OTP) reworked the proposal as a heavy rail line with underground and elevated sections 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 Yellow Line into two phases for tender and construction purposes and to reduce land appropriation costs.{{cite web|url=http://www.thanonline.com/index.php?option=com_content&view=article&id=99466:2-&catid=128:-real-estate-&Itemid=478|title=ฐานเศรษฐกิจ - Connecting Opportunity|access-date=27 August 2016}} In June 2012, the MRTA contracted consultants to undertake detailed designs of the line. In February 2013, OTP stated that the tender for the Yellow Line should be ready by late 2013 for tender in early 2014.{{cite web|url=http://www.thaipost.net/news/110213/69374 |title=สนข.เร่งสร้างรถไฟฟ้า ฟุ้งปี56ได้ใช้ตั๋วร่วมแน่ | ไทยโพสต์ |access-date=2014-06-27 |url-status=dead |archive-url=https://web.archive.org/web/20131216182702/http://www.thaipost.net/news/110213/69374 |archive-date=2013-12-16 }} By August 2013, this timeline had changed to a mid 2014 tender date.{{Cite web|url=http://www.manager.co.th/iBizChannel/ViewNews.aspx?NewsID=9560000105880|title = ผู้จัดการออนไลน์ รวดเร็ว สด ทุกเหตุการณ์}}

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 delays. Thereafter, a coup in May 2014 resulted in a new military administration and the tender being deferred while a review of all mass transit projects was undertaken for a period of 18 months. 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, The BSR consortium consisting of BTS Group Holdings (75% majority stake) with Sino-Thai Engineering and Construction (STEC), and Ratchaburi Electricity Generation Holding (RATCH), won the bid to construct and operate the Yellow Line. The BSR also won the bid to build and operate the MRT Pink Line.{{cite news |title=BSR Joint venture wins rights for Bangkok's Yellow, Pink line MRTA construction|url=http://www.bangkokpost.com/archive/joint-venture-wins-rights-for-yellow-pink-line-construction/1153213 |newspaper=Bangkok Post |date=7 December 2016}}

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 (EBM) to operate the line. A proposed 2 station extension of the route north from the Lat Phrao terminus to link to the BTS Sukhumvit Line at Ratchayothin station has also been proposed by the BSR Joint Venture.{{Cite news|url=https://www.nationthailand.com/news/business/EconomyAndTourism/30318283|title=Junta to call bids for most infra projects - The Nation|work=The Nation|access-date=2017-06-17|language=en}} However, this extension is opposed by the MRT Blue Line operator BEM due to concerns regarding loss of revenue.Author meeting with MRTA planning division on 7 August 2019 at MTRA Headquarters

Construction of the Yellow Line began in March 2018.{{cite news |title=Construction of monorail lines gets ceremonial launch |url=https://www.bangkokpost.com/news/transport/1529266/construction-of-monorail-lines-gets-ceremonial-launch. |newspaper=Bangkok Post |date=27 August 2018}}

The public trial run started on 3 June 2023, between Hua Mak and Samrong. The Phawana-Si Kritha section opened on 12 June, while Lat Phrao station opened on 19 June.

As of June, 2024. Passengers are required to change train due to technical difficulties, sections of station runs in different frequency. Latphrao to Huamak runs every 5 minutes, Huamak to Sri Iam runs every 25 minutes and from Sri Iam to the terminus Samrong every 10 minutes. Yellow maintenance carts can be seen along the line from Huamak to Samrong.

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. However, this extension is opposed by the MRT Blue Line operator BEM, 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.{{Cite web |date=2021-03-22 |title=BEMร้องขอค่าชดเชย ชี้รายได้หด/หลัง'สายสีเหลือง'วิ่ง |url=https://www.naewna.com/business/560756 |access-date=2021-11-01 |website=www.naewna.com |language=th}}

The extension was approved in February 2021, with construction set to be completed in 2024.{{Cite web |title=[Realist Post] อัพเดตสายสีเหลือง เตรียมเสนอ รฟม.อนุมัติเพิ่มส่วนต่อขยาย 2 สถานี เชื่อมรถไฟฟ้า 3 สาย |url=https://www.facebook.com/realist.co.th/posts/3449331311842385 |website=Facebook}} However, EBM has repeatedly denied MRTA's request to provide compensation for BEM, which may result in a cancellation of the extension if no decision has been made.{{Cite web |title=รถไฟฟ้า"สายสีเหลืองส่วนขยาย"ส่อแววแท้ง! |url=https://www.facebook.com/TransportDailynews/posts/2845053672382799 |website=Facebook}} Regardless, due to lower-than-expected passenger numbers, MRTA decided to put the extension plan on hold, as the Yellow Line needs at least 100,000 passengers per day to ensure the investment feasibility of the project.{{Cite web |date=2023-10-03 |title=MRTA cancels expansion plan for Yellow Line |url=https://www.nationthailand.com/thailand/general/40031556 |access-date=2024-08-22 |website=nationthailand |language=en-US}}

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 Road.

File:Bangkok Yellow Line Route Map at Si Thepha.jpg|287x287px]]

File:Yellow Line at Si Kritha Station 02.jpg|Innovia Monorail 300 rolling stock used on the Yellow line, at Si Kritha station

File:Yellow Line at Lat Phrao Station 03.jpg|Innovia Monorail 300 trains at Lat Phrao Station

File:Bombardier Innovia Monorail 300 YellowLine Inside 20230902.jpg|Interior of the Yellow Line train

File:Yellow Line train interior 02.jpg|Interior of the Yellow Line train

File:Bangkok Yellow line train departing Thipphawan towards Samrong.webm|Yellow Line train departing Thipphawan station towards Samrong station

BSR selected Bombardier Innovia Monorail 300 rolling stock for the Yellow line.{{Cite news |title=ข่าวรอบวัน |url=https://www.prachachat.net/news_detail.php?newsid=1497601230 |newspaper=ประชาชาติธุรกิจ}} The BSR announced that they would purchase 28 4-car sets to operate the Yellow line.{{Cite web |title=ผู้จัดการออนไลน์ รวดเร็ว สด ทุกเหตุการณ์ |url=http://www.manager.co.th/iBizChannel/ViewNews.aspx?NewsID=9600000055953}} The trains were manufactured by CRRC Puzhen Bombardier Transportation Systems (joint venture of Bombardier Transportation and CRRC Nanjing Puzhen) in Wuhu, Anhui, China. The first set was assembled and shipped on 4 September 2020 with delivery to Thailand at the end of September 2020.http://ah.sina.com.cn/news/2020-09-04/detail-iivhvpwy4950163.shtml ah.sina.com.au, 4 September 2020 The first set arrived in Thailand on 1 October 2020 at Laem Chabang port with a handover ceremony attended by the Thai Prime Minister, BTSC Chairman, MRTA and Canadian Ambassador.{{cite news |date=2 October 2020 |title=Bangkok monorail trains arrive |url=https://www.railwaygazette.com/vehicles/bangkok-monorail-trains-arrive/57489.article |newspaper=Railway Gazette}} Two more sets arrived in mid December 2020 for a total of 5 sets by the end of 2020. By July 2021, 8 sets had been delivered and were being tested.{{cite news |date=22 July 2021 |title=Monorails arrive |url=https://www.facebook.com/TransportDailynews |newspaper=Transport Daily news}} As of the end of October 2021, 12 sets had been delivered.{{cite news |date=29 October 2021 |title=เริ่มพรุ่งนี้! ปิดฝั่งละช่องสะพานข้ามแยก "รัชดาฯ-ลาดพร้าว" วางคานเหล็กรถไฟฟ้าสีเหลือง |url=https://www.dailynews.co.th/news/423180/ |newspaper=Dailynews}} By the end of November 2021, the BSR stated that 20 sets had been delivered with the remaining sets expected to be fully delivered by the end of March 2022. However, as of mid April 2022 only 26 sets had been received and were progressing undergoing testing.{{cite news |date=19 April 2022 |title="รถไฟฟ้าชมพู-เหลือง" ทดสอบเดินรถเสมือนจริง ก.ย.นี้ |url=https://www.dailynews.co.th/news/970338/ |newspaper=Dailynews}} The remaining sets were expected to be delivered by July 2022.

Technical Characteristics

• Low profile vehicles/low floor height above beam{{cite web |title=ALWEG - Bombardier Innovia Monorail 300 |url=http://www.monorails.org/tmspages/TPInnovia300.html |url-status=dead |archive-url=https://web.archive.org/web/20150707045358/http://www.monorails.org/tmspages/TPInnovia300.html |archive-date=2015-07-07 |website=The Monorail Society - Technical Page |publisher=The Monorail Society}}
• Distinct sloped nose/end-cap
• Inter-car walkthrough
• Rubber-tires and permanent magnet motor
• 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.http://mail.monorails.org/pdfs/INNOVIA%20300.pdf Bombardier Innovia 300 Technical Sheet
• Innovia Monorails are all fully automated and are equipped with CITYFLO 650 GOA 4 (Fully Automated Train Control)communications-based train control for driverless operation to increase reliability, shorten head ways between trains and lower maintenance costs.{{cite web |title=Bombardier named systems supplier of the year - INNOVIA Monorail 300 system and CITYFLO 650 technology are winners in Sao Paulo |url=http://www.purchasingb2b.ca/1-purchasingb2b/bombardier-named-systems-supplier-of-the-year-59521/ |url-status=dead |archive-url=https://web.archive.org/web/20150713071829/http://www.purchasingb2b.ca/1-purchasingb2b/bombardier-named-systems-supplier-of-the-year-59521/ |archive-date=2015-07-13 |access-date=2015-07-06 |website=Purchasing B2B}}

The BSR stated that the passenger capacity for 4-car sets will be 17,000 passengers per hour each way.

File:Yellow Line at Lat Phrao Station 02.jpg]]

The Bombardier Innovia Monorail 300 operates on a narrow, elevated guideway beam. Pre-cast, post-tensioned guideway beams are constructed at an off-site location and later installed on the system. The guideway beams are {{Cvt|690|mm}} wide. The Innovia Monorail 300 was designed to navigate curves as tight as {{Cvt|46|m}} and a maximum grade of 6%. Monorail switches are either beam replacement or multi-position pivot switches.{{cite web |title=INNOVIA Monorail 300 System: a mass transport solution for the megacity of São Paulo |url=http://www.cg-la.com/documents/LALF11/presentations/6.4.13UMTBombardier.pdf |url-status=dead |archive-url=https://web.archive.org/web/20160304030236/http://www.cg-la.com/documents/LALF11/presentations/6.4.13UMTBombardier.pdf |archive-date=2016-03-04 |access-date=2020-08-15 |website=CG/LA Infrastructure, Inc}} The system has evacuation walkways down the entire length of the guideway beam. These walkways allow passengers to escape any onboard hazard. The maintenance crew also uses these walkways for repairs and general maintenance to the system.{{cite web |title=URBAN MONORAIL TRACK |url=http://www.monorailsaustralia.com.au/track.html |website=Monorail Australia |publisher=The Monorail Society}}

From January 25 to January 31, 2025, Prime Minister Paetongtarn Shinawatra has implemented a policy of free public transportation in Bangkok for one week. This measure aims to address the worsening air pollution caused by surging dust levels across all districts of the capital.

On 2 January 2024, a guide wheel from one of the trains fell off between Si Thepha Station and Si Dan Station and hit a taxi on Thepharak Road. There were no injuries.{{Cite web |title=ระทึก! ล้อรถไฟฟ้าสายสีเหลืองหลุดตกใส่แท็กซี่ เคราะห์ดีไม่มีคนเจ็บ |date=2 January 2024 |url=https://www.pptvhd36.com/news/%E0%B8%AA%E0%B8%B1%E0%B8%87%E0%B8%84%E0%B8%A1/213773}} Investigations found the cause to be a broken ball bearing socket holding the wheels. The event followed a similar incident a week earlier on the Pink Line, where a 300-meter section of the on conductor rail fell onto the road near Samakkhi station.{{Cite news |title=Govt seeks free rides after Pink Line fault |url=https://www.bangkokpost.com/thailand/general/2712736/govt-seeks-free-rides-after-pink-line-fault |access-date=2023-12-26 |work=Bangkok Post |date=26 December 2023 |language=en |last1=Wancharoen |first1=Supoj }} The following day, trains operated at 55-minute intervals with many complaints from commuters returning to work on the first day after the new year holidays.{{Cite web |title='รอ 55 นาทีต่อขบวน' รถไฟฟ้าสายสีเหลืองปรับเวลาเดินรถหลังล้อหลุด รมว.คมนาคมเรียกถกด่วน เตรียมคาดโทษตัดสิทธิ์ผู้รับสัมปทาน |date=3 January 2024 |url=https://thestandard.co/yellow-line-train-changed-time-after-wheel-off-incident/}} EBM is expected to be fined heavily for the damage. Service was restored on 4 January with trains running at 15-minute intervals free of charge.{{Cite web |title=เปิดปกติ! รถไฟฟ้าสายสีเหลือง แจ้งวันนี้ (4 ม.ค. 67) บริการฟรี ปรับความถี่เป็น 15 นาทีต่อขบวน |date=4 January 2024 |url=https://mgronline.com/business/detail/9670000000817}}

On 28 March 2024 loose bolts caused parts to fall from the conductor rail to the street below between Kalantan and Si Udom stations causing service to be suspended and damaging vehicles.{{Cite news |title=Yellow Line service suspended after parts fall onto street |url=https://www.bangkokpost.com/thailand/general/2766833/yellow-line-service-suspended-after-parts-fall-onto-street |access-date=2024-03-30 |work=Bangkok Post |date=28 March 2024 |language=en}} The following day limited service was resumed{{Cite news |title=Yellow Line resumes limited services with fare discount |url=https://www.bangkokpost.com/thailand/general/2767431/yellow-line-resumes-limited-services-with-fare-discount |access-date=2024-03-30 |work=Bangkok Post |date=29 March 2024 |language=en}} but a power outage at Hua Mak caused a further partial suspension of service.{{Cite news |title=Power cut at Hua Mak causes delays |url=https://www.bangkokpost.com/thailand/general/2767678/power-cut-at-hua-mak-causes-delays |access-date=2024-03-30 |work=Bangkok Post |date=30 March 2024 |language=en |last1=Wancharoen |first1=Supoj }} Six stations were still closed two days after the incident.{{Cite news |title=Yellow Line temporarily closes six stations |url=https://www.bangkokpost.com/thailand/general/2767936/yellow-line-temporarily-closes-six-stations |access-date=2024-03-30 |work=Bangkok Post |date=30 March 2024 |language=en}} Repairs to the affected section could take 2–3 months.{{Cite news |title=Yellow Line track improvement to take months |url=https://www.bangkokpost.com/thailand/general/2768386/yellow-line-track-improvement-to-take-months |access-date=2024-03-31 |work=Bangkok Post |date=31 March 2024 |language=en}}

On March 28, a 7.7-magnitude earthquake in Myanmar struck Bangkok, leading to the temporary suspension of all train services to ensure readiness for resumption and to prepare for potential aftershocks. The line resumed normal service on March 30, 2025, at 12:00.{{Cite web |date=2025-03-28 |title=Train services suspended for safety after earthquake in Myanmar |url=https://www.nationthailand.com/news/general/40047989 |access-date=2025-04-02 |website=nationthailand |language=en-US}}{{Cite web |date=2025-03-30 |title=รถไฟฟ้า "สายสีเหลือง" เตรียมเปิดให้บริการเที่ยงวันนี้ ส่วน "สายสีชมพู" ยังปิด |url=https://www.thairath.co.th/news/society/2850090 |access-date=2025-04-02 |website=www.thairath.co.th |language=th}}

{{Wide image|MRT Yellow Line Map 2024.svg|1600px}}{{Rapid transit OSM map

| frame-lat = 13.720

| frame-long = 100.600

| frame-width = 950

| frame-height = 350

| zoom = 12

| stations = y

| single_line = y

| text = Route of the Yellow Line

| plain = no

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{{Wide image|File:2023versionofbangkokmassrapidtransitmap.png|700px}}

File:Bangkok MRT Yellow Line Monorail YM14, Hua Mak (20240629b) (54222773018).jpg|MRT Yellow Line train at Sam Yot MRT station Hua Mak station.

File:Bangkok MRT Yellow Line Monorail YM13, Hua Mak (20240629a) (54222775829).jpg|MRT Yellow Line train passing under the Airport Rail Link viaduct at Sam Yot MRT station Hua Mak station.

File:202402 Station Building of MRT Hua Mak Station.jpg|Exterior of Sam Yot MRT station Hua Mak station.

File:Yellow Line Si Iam Depot.jpg|Si Iam Depot.

File:รถไฟฟ้าสายสีเหลือง Yellow Line Sky Train (8).jpg|Train approaching Sam Yot MRT station Lat Phrao station.

File:รถไฟฟ้าสายสีเหลือง Yellow Line Sky Train (7).jpg|Another view of Yellow Line train approaching Sam Yot MRT station Lat Phrao station.

{{Div col|colwidth=20em}}

• Mass Rapid Transit Master Plan in Bangkok Metropolitan Region
• MRT (Bangkok)
• MRT Blue Line
• MRT Brown Line
• MRT Grey Line
• MRT Light Blue Line
• MRT Orange Line
• MRT Purple Line
• MRT Pink Line
• BTS Skytrain
• BTS Sukhumvit Line
• BTS Silom Line
• Airport Rail Link (Bangkok)
• SRT Light Red Line
• SRT Dark Red Line
• Bangkok BRT
• BMA Gold Line

{{Div col end}}

{{Reflist}}

{{commons category|MRT Yellow Line}}

• [http://www.mrta-yellowline.com/ "MRTA Yellow Line website]
• [https://www.mrta.co.th/th/ MRTA]
• [https://www.alstom.com/press-releases-news/2023/6/alstoms-automated-innovia-monorail-system-enters-service-bangkok/ MRT Yellow Line and MRT Pink Line Alstom News]

{{Bangkok Rapid Transit stations

|Yellow=yes

}}

{{Public transport in Bangkok}}

{{Urban Rail Transit in ASEAN}}

{{DEFAULTSORT:Yellow Line}}

Yellow line

Category:Railway lines opened in 2023

Category:Monorails in Thailand

Category:Monorail lines