View source for Orange Line (Bangkok)

{{Short description|Planned metro line in Bangkok, Thailand}}
{{Infobox rail line
| name                            = MRT Orange Line<br />รถไฟฟ้ามหานคร สายสีส้ม
| color                           = {{rcr|MRT|Orange}}
| logo                            = MRT (Bangkok) Orange logo.svg
| logo_width                      = 50px
| image                           = Min Buri Station (Orange line).jpg
| image_width                     = 300px
| caption                         = Min Buri Station
| type                            = [[Rapid transit]]
| system                          = [[MRT (Bangkok)|MRT]]
| status                          = '''Structure Complete :''' <br /><small>{{MRT Station Numbering|OR|13}} [[Thailand Cultural Centre MRT Station|Thailand Cultural Centre]] -<br />{{MRT Station Numbering|OR|29}} [[Yaek Rom Klao MRT station|Yaek Rom Klao]]</small><br />'''Under Construction :'''<br /><small> {{MRT Station Numbering|OR|02}} [[Bang Khun Non MRT Station|Bang Khun Non]] -<br /> {{MRT Station Numbering|OR|13}} [[Thailand Cultural Centre MRT Station|Thailand Cultural Centre]]</small><br />'''Future :'''<br /><small>{{MRT Station Numbering|OR|01}} [[Taling Chan railway station|Taling Chan]] -<br /> {{MRT Station Numbering|OR|02}} [[Bang Khun Non MRT Station|Bang Khun Non]]</small>
| locale                          = [[Bangkok]], [[Thailand]]
| start                           = {{MRT Station Numbering|OR|01}} Taling Chan
| end                             = {{MRT Station Numbering|OR|29}} Yaek Rom Klao
| stations                        = 17 <small>''(Structure Complete)''</small><br />11 <small>''(Under construction)''</small><br />1 <small>''(future)''</small>
| routes                          = 
| daily_ridership                 = 
| website                         = https://www.mrta-orangelineeast.com/en/home
| yearcommenced                   = {{Start date and age|2017|02|09|df=y}}
| planopen                        = '''2028 :'''<br /><small>{{MRT Station Numbering|OR|13}}[[Thailand Cultural Centre MRT Station|Thailand Cultural Centre]] -<br />{{MRT Station Numbering|OR|29}} Yaek Rom Klao</small><br /><ref name="railwaygazette" />'''July 2030 :'''<br /><small>{{MRT Station Numbering|OR|02}} [[Bang Khun Non MRT Station|Bang Khun Non]] -<br />{{MRT Station Numbering|OR|13}} [[Thailand Cultural Centre MRT Station|Thailand Cultural Centre]]</small><br /><ref name="railwaygazette" />'''{{abbr|TBA|To be announced}} :'''<br /><small>{{MRT Station Numbering|OR|01}} Taling Chan -<br />{{MRT Station Numbering|OR|02}} [[Bang Khun Non MRT Station|Bang Khun Non]]</small>
| close                           = 
| owner                           = [[Mass Rapid Transit Authority of Thailand]]
| operator                        = [[Bangkok Expressway and Metro]]
| character                       = 
| depot                           = Phra Ram 9
| stock                           = '''[[Siemens]]'''<br />32 three-car trains
| linelength                      = {{convert|38.78|km|mi|abbr=on}}<br />'''Elevated''' {{convert|8.43|km|mi|abbr=on}}<br />'''Underground:''' {{convert|30.35|km|mi|abbr=on}}
| tracks                          = 
| gauge                           = {{RailGauge|sg|allk=on}}
| electrification                 = {{750 V DC|conductor=y}}
| speed                           = {{cvt|80|km/h|mph|abbr=on}}
| elevation                       = 
| map                             = {{MRT Orange Line route|inline=1}}
| map_state                       = show
}}

The '''MRT Orange Line''' ({{langx|th|รถไฟฟ้ามหานคร สายสีส้ม}}) is a [[rapid transit]] line of the [[Mass Rapid Transit Authority of Thailand]] (MRTA) in the [[Bangkok Metropolitan Area]], [[Thailand]]. When fully completed, the MRT Orange line will be {{Cvt|35.9|km}} long with 29 [[Metro station|stations]] (7 stations will be elevated for {{Cvt|8.9|km}} and 22 will be underground for {{Cvt|27|km|4=1}}), including an interchange with the current [[Thailand Cultural Centre MRT Station|Thailand Cultural Centre Station]] of [[MRT Blue Line]]).

The MRT Orange Line is divided into two sections: the {{Cvt|22.5|km}} Eastern Section, running from Yaek Rom Klao to Thailand Cultural Centre,<ref>{{cite news |author=<!--Staff writer(s)/no by-line.--> |date=9 February 2017 |title=Six contracts signed for construction of B79.2bn Orange Line |url=https://www.bangkokpost.com/thailand/general/1195629/six-contracts-signed-for-construction-of-b79-2bn-orange-line |work=[[Bangkok Post]] |access-date=12 February 2017}}</ref><ref>{{cite news |last=Mokkhasen |first=Sasiwan |date=5 July 2017 |title=MRT Orange Line construction to begin Monday |url=https://www.khaosodenglish.com/featured/2017/07/05/mrt-orange-line-construction-begin-monday/ |work=[[Khaosod]] English |location=Thailand |access-date=20 November 2021}}</ref> and the {{Cvt|13.4|km}} Western Section, extending from Thailand Cultural Centre to Bang Khun Non.

Construction of the Eastern Section commenced in June 2017, and civil works were completed 100% as of June 2023.<ref>{{Cite web |title=The MRT Orange Line (East Section) |url=https://www.mrta-orangelineeast.com/en/home_progress |access-date=2024-10-28 |website=mrta-orangelineeast.com}}</ref> However, delays in awarding contracts for the signaling systems and rolling stock postponed the line’s opening. In December 2024, Bangkok Expressway and Metro Public Company Limited (BEM) signed a contract with Siemens Mobility and its consortium partners to supply rolling stock and signaling systems for both sections of the line. The Eastern Section is projected to open to the public in 2028.<ref name="railwaygazette">{{cite web |url=https://www.railwaygazette.com/metros/thai-metro-rolling-stock-and-signalling-contracts-let/68189.article |title=Thai metro rolling stock and signalling contracts let |website=Railway Gazette |date=2024-12-15 |access-date=2025-01-28}}</ref>

Construction of the Western Section began in July 2024. As of December 2024, civil construction had progressed to 4.04%.<ref name="December2024completion">{{cite news |title=MRTA  December 2025 construction progress|url=https://www.facebook.com/MRTA.PR/posts/pfbid02H7nRE1CYmPCdW9xPobPhGjAmphgaTdE6yR4zN8nnukYv8A21gUG3vziWc3iZ1iCql |newspaper=MRTA |date=9 January 2025}}</ref> This section is expected to require approximately six years for completion, with an anticipated opening in July 2030.<ref name="railwaygazette" />

==Route alignment==
The MRT Orange Line will travel along a mostly east-west axis from Bangkok's eastern suburbs, passing through the city center and [[Ko Rattanakosin]], before serving [[Thonburi]] on the west bank of the [[Chao Phraya River]].

The initial phase of the Orange Line will travel along an elevated structure above Ramkhamkhaeng Road from Yaek Rom Klao station, near the Ramkhamhaeng-Suwinthawong Junction in [[Min Buri District]], to Ban Ma Junction in [[Bang Kapi District]] for {{Cvt|7.5|km}} before transitioning underground.  The line will continue to travel southwest under Ramkhamhaeng Road until its intersection with Rama IX Road, whence it will proceed westward under Rama IX Road before terminating at [[Thailand Cultural Centre MRT station|Thailand Cultural Centre]].  

Interchanges for this segment will be available to [[MRT Pink Line]] at [[Min Buri MRT station|Min Buri]], [[MRT Yellow Line]] at [[Yaek Lam Sali MRT station|Yaek Lam Sali]], and the [[MRT Blue Line]] at [[Thailand Cultural Centre MRT station|Thailand Cultural Centre]].  

The western section of the MRT Orange Lin will travel west from [[Thailand Cultural Centre MRT Station|Thailand Cultural Centre Station]] via Din Daeng housing estates and Bangkok City Hall 2 to [[Vibhavadi Rangsit Road]], Sam Liam Din Daeng Junction. It will follow Ratchaprarop Road towards [[Pratunam]] before following Phetchaburi Road and Lan Luang Road as the alignment approaches [[Ko Rattanakosin]].  The line will travel under [[Ratchadamnoen Avenue]] to serve [[Sanam Luang]] and [[Banglamphu]] before crossing the [[Chao Phraya River]] near [[Phra Pinklao Bridge]].  Once in [[Thonburi]], the line will follow the [[Bangkok Noi District|Bangkok Noi]] spur line of the [[State Railway of Thailand|SRT commuter train]] before terminating at Bang Khun Non, located at Charan Sanitwong road, where there will be an interchange with the [[MRT Blue Line]].

In addition to interchanging with the [[MRT Blue Line]], the western segment will also include an interchange to the [[Airport Rail Link (Bangkok)|Airport Rail Link]] at [[Ratchaprarop station]], the BTS [[Sukhumvit Line]] at [[Ratchathewi BTS Station|Ratchathewi Station]], the [[MRT Purple Line]] at the future [[Democracy Monument MRT station|Democracy Monument station]]. A further extension to [[Taling Chan Junction station]] is envisioned.

==History==

=== Development ===
The original plan of the MRT Orange Line aimed to serve travel demand between the northwestern area of [[Thonburi]], at Bang Bamru Railway Station in [[Bang Phlat District]], and the east of [[Bangkok]] in [[Bang Kapi District]]. It was planned to run along Ramkhamhaeng Road and [[Ratchawithi Road]], passing many public places like [[Rajamangala Stadium|Hua Mak Stadium]], [[Dusit Zoo]] and [[Victory Monument (Bangkok)|Victory Monument]], and provide access to universities including [[Ramkhamhaeng University]], Suan Sunandha and Suan Dusit [[Rajabhat University]] and many government offices. In the 1990s proposal for the Orange Line, it indicates a route length of 27.3 kilometers from Bang Kapi to [[Rat Burana district|Rat Burana District]], while the planned extensions are to Ban Na for 16.4 kilometers and finally to [[Min Buri district|Min Buri District]] for 10 kilometers.<ref>{{Cite web |title=Urban Railway Projects In Bangkok - Measures for Securing Financial Resources |url=https://www.jica.go.jp/Resource/jica-ri/IFIC_and_JBICI-Studies/jica-ri/english/publication/archives/jbic/report/oecf/pdf/25_e.pdf}}</ref>

In 2009, OTP proposed that the original MRT Brown line plan from Bang Kapi District elevated along Ram Khamhaeng Road to the eastern suburbs in [[Saphan Sung District]] and [[Min Buri District]], be merged with the Orange Line and updated Bangkok's mass rapid transit master plan accordingly.<ref>{{Cite web |url=http://www.otp.go.th/Bkk_mrt/progress.php |title=โครงการศึกษาเพื่อปรับแผนแม่บทระบบขนส่งมวลชนทางรางในเขตกรุงเทพมหานครและปริมณฑล |access-date=2010-03-17 |archive-url=https://web.archive.org/web/20100611000352/http://www.otp.go.th/Bkk_mrt/progress.php |archive-date=2010-06-11 |url-status=dead }}</ref> In July 2011, the section from Bang Khun Non to Taling Chan was finally scrapped in favour of the [[SRT Light Red Line]] spur line which duplicates the same route.<ref name="manager.co.th">{{Cite web|url=http://www.manager.co.th/Business/ViewNews.aspx?NewsID=9540000082642|title = ข่าวผู้จัดการ แตกต่างกว่าที่นึก ลึกกว่าที่คิด &#124; ผู้จัดการออนไลน์}}</ref> In 2012, there were further notable changes made to the central and western sections of the Orange Line. The section from [[Din Daeng District]] to Bang Bamru was rerouted away from Victory Monument and Ratchawithi road route to further run south to [[Pratunam]] and then west along Petchaburi Road and Larn Luang Road. Continuing farther west along [[Ratchadamnoen Klang Road]] and [[Sanam Luang]] before passing under the [[Chao Praya]] river and finally terminating at Bang Khun Non to interchange with the [[MRT Blue Line]] extension.

The MRT Orange line Eastern section was originally planned to be tendered by the end of 2013. However, due to protests by residents regarding station footprint and compulsory land acquisition around stations at Pratunam, Ratchaprarop, Pracha Songkhro and Soesim stations the MRTA needed another 12 months to redesign sections of the line.<ref>{{cite web|url=http://thaipost.net/news/140513/73484 |title=คมนาคมสั่งรฟม.รื้อ "สายสีส้ม"1.8แสนล. &#124; ไทยโพสต์ |access-date=2014-03-20 |url-status=dead |archive-url=https://web.archive.org/web/20140320144843/http://www.thaipost.net/news/140513/73484 |archive-date=2014-03-20 }}</ref> Subsequently, political protests against the Thai government led to the metro transport funding bill lapsing when parliament was dissolved in December 2013. On 9 December 2015, Cabinet finally approved the Orange Line. On 19 April 2016, the Cabinet further approved a budget of 82.9 billion baht for Phase 1 Eastern section to build 17 stations and {{Cvt|22.5|km}} of rail from the Thailand Cultural Centre to Minburi, of which {{Cvt|12.2|km}} will be underground and {{Cvt|9|km}} will be elevated.<ref>{{Cite news|url=http://www.bangkokpost.com/news/general/939669/orange-line-wins-cabinet-approval|title = Orange Line wins cabinet approval|newspaper = Bangkok Post}}</ref> The consultation was led by MHPM for project implementation services to Chotjinda Consultant for construction supervision and to MAA Consultant, also for project management and construction.<ref>{{Cite web |date=2017-06-06 |title=MRTA approves Bt2.6 bn to consultants for Orange Line |url=https://www.nationthailand.com/business/30317379 |access-date=2024-12-20 |website=nationthailand |language=en-US}}</ref> 

=== Western section tender delay and litigation ===
On 3 July 2020, the MRTA released the tender for the design and construction of the Western extension.<ref name="MRT Orange Line extension tender">{{cite news |date=3 July 2020 |title=MRT Orange Line extension tender |url=https://www.mrta.co.th/en/news/announcement_mrta/invitation-to-tender-public-private-partnership-mrt-orange-line-project-bang-khun-non-min-buri-suwinthawong-section/invitation-to-tender-public-private-partnership-mrt-orange-line-project-bang-khun-non-min-buri-suwinthawong-section |newspaper=MRTA Website}}</ref> However in late August 2020, the tender submission deadline was subsequently delayed.<ref name="prachachat.net">{{cite news |date=21 August 2020 |title=รถไฟฟ้าสายสีส้ม เลื่อนยื่นซอง 45 วัน รฟม.รื้อเกณฑ์ประมูลใหม่ |url=https://www.prachachat.net/property/news-509520 |newspaper=Prachachat news}}</ref> and the MRTA amended the tender assessment criteria resulting in a lawsuit and an injunction suspending the tender decision.<ref name="ด่วน! ศาลสั่งคุ้มครองบีทีเอส ให้ รฟ">{{cite news |date=20 October 2020 |title=ด่วน! ศาลสั่งคุ้มครองบีทีเอส ให้ รฟม. ประมูลสายสีส้ม ตามเกณฑ์เดิม |url=https://www.prachachat.net/property/news-541247 |newspaper=Prachachat news}}</ref> The tender was subsequently cancelled by the MRTA in February 2021 given ongoing litigation by the BTSC.<ref name="ภคพงศ์ ศิริกันทรมาศ ไขปมล้มประมูล">{{cite news |date=27 February 2021 |title=ภคพงศ์ ศิริกันทรมาศ ไขปมล้มประมูล "รถไฟฟ้าสายสีส้ม" |url=https://www.prachachat.net/property/news-618843 |newspaper=Prachachat news}}</ref> After approval by the Administrative Court given ongoing litigation, a new tender issued in October has a deadline for bids of January 2022.<ref name="bangkokbiznews.com">{{cite news |date=5 September 2021 |title=1 ปีที่หายไป ประมูล 'รถไฟฟ้าสายสีส้ม' |url=https://www.bangkokbiznews.com/news/detail/958265 |newspaper=BangkokBiz news}}</ref>

The Criminal Court - Corruption and Malfeasance Division hearing into the cancelled tender process was conducted in late December 2021 which further delayed the reissued tender timeframe.<ref>{{cite news |date=25 October 2021 |title=ศาลอาญาคดีทุจริตรับคำฟ้อง! "บีทีเอสร้องรถไฟฟ้าสีส้ม" |url=https://www.facebook.com/TransportDailynews/posts/3031000807121417 |newspaper=Daily News}}</ref> Subject to court approval, the MRTA planned to review tender bids for a period of 3 months before seeking Cabinet approval for a reissued tender in April or May 2022. The MRTA reissued the new tender on 24 May 2022 with tender packages available for purchase until 10 June.<ref name="dailynews.co.th">{{cite news |date=24 May 2022 |title=ประมูลรอบใหม่! ขายซองรถไฟฟ้าสีส้ม "บางขุนนนท์-มีนบุรี" |url=https://www.dailynews.co.th/news/1078505/ |newspaper=Daily News}}</ref> 14 different companies purchased the auction envelopes.<ref>{{cite news |date=11 June 2022 |title=ประมูลสายสีส้มกระหึ่ม กัลฟ์ -ไชน่าฮาเบอร์ -ยักษ์เกาหลี -ญี่ปุ่นแจมซื้อซอง |url=https://www.thansettakij.com/economy/528420 |newspaper=Thansettakij}}</ref>

The 141 billion baht western extension consists of 86 billion baht for civil works, 14 billion for land appropriation and 31 billion for systems installation, rolling stock and maintenance.  The winning bidder was announced by the MRTA on 9 September 2022 with BEM winning the right to build and run the extension over the ITD consortium.<ref name="bangkokpost.com">{{cite news |title=BEM wins bid for Orange Line project|url=https://www.bangkokpost.com/business/2387481/bem-wins-bid-for-orange-line-project |newspaper=Bangkok Post |date=9 September 2022}}</ref> However, continued litigation by the BTSC into 2023 has delayed the start of construction.

In November 2024, [[AECOM]] has been chosen by CH. Karnchang Plc (CK) is the lead designer for the western section, while [[Egis Group|Egis]] is to offer project management and supervision services on a section.<ref>{{Cite web |last=May |first=Tiana |date=2024-11-05 |title=AECOM to Design Bangkok's MRT Orange Line West |url=https://railway-news.com/aecom-to-design-bangkoks-mrt-orange-line-west/ |access-date=2024-12-20 |website=Railway-News |language=en-gb}}</ref><ref>{{Cite web |last=Quirke |first=Joe |date=2024-12-10 |title=Egis-led team wins role on Bangkok’s new Orange Line |url=https://www.globalconstructionreview.com/egis-led-team-wins-role-on-bangkoks-new-orange-line/ |access-date=2024-12-20 |website=Global Construction Review |language=en-GB}}</ref> EPC consultancy services were handled by Dorsch Gruppe and its Asian subsidiary, along with China Railway No. 2 Engineering Group Co., Ltd.<ref>{{Cite web |last=Co |first=Dorsch Consult asia |last2= |first2= |last3= |first3= |title=Dorsch Gruppe: MRT Line Taling Chan - Min Buri, Bangkok: Dorsch Global DC Asia |url=https://dc-asia.dorsch.de/projects/detail/project/mrt-orange-line |access-date=2024-12-20 |website=dc-asia.dorsch.de |language=en}}</ref>

==Construction progress==

=== Eastern section ===
Construction contracts were signed on 9 February 2017 between the MRTA and CKST Joint Venture consortium.<ref>{{cite news |title=MRT Orange Line contracts signed |url=http://englishnews.thaipbs.or.th/construction-orange-line-contracts-signed |newspaper= Thai PBS |date=9 February 2017}}</ref> Construction finally started in June 2017 with a 1980 day construction period with a scheduled opening in October 2022.<ref>{{cite news |title=Lane closures for Orange line start in Ramkhamhaeng |url=http://www.bangkokpost.com/news/transport/1287118/lane-closures-for-orange-line-start-in-ramkhamhaeng |newspaper= Bangkok Post |date=9 February 2017}}</ref>

At the end of the year, 31 December 2017, progress of civil works construction was at 4.66% according to the MRTA.<ref>{{cite news |title=MRT Orange Line construction update December 2017 2023|url=https://www.mrta.co.th/th/news/information/ความก-าวหน-าการก-อสร-างรถไฟฟ-า-ณ-31-ธ-นวาคม-2560/ |website=MRTA PR |date=7 January 2018}}</ref> By the end of July 2018, overall construction progress was 13.57%. By 30 September 2018, overall construction had progressed to 18.33%.
<ref>{{cite news |title=MRT Orange Line construction update October 2018 |url=https://www.facebook.com/MRTA.PR/photos/a.1433440196872710/2109998672550189/ |website=MRTA PR |date=12 October 2018}}</ref> At the end of March 2019, construction had progressed to 32.12%.<ref>{{cite web | url-access=limited  |archive-url = https://ghostarchive.org/iarchive/facebook/1409174012632662/2214355752114480 |archive-date = 2022-04-30| url = https://www.facebook.com/MRTA.PR/photos/a.1433440196872710/2214355752114480 |title = การรถไฟฟ้าขนส่งมวลชนแห่งประเทศไทย on Facebook  |website=[[Facebook]]}}{{cbignore}}''MRTA Press''</ref> At the end of July 2019, civil construction was at 42.27%.
<ref>{{cite news |title=MRT Orange Line construction update August 2019 |url=https://www.facebook.com/MRTOrangeLineEast/photos/pcb.642832046196150/642831682862853 |website=MRTA PR |date=9 August 2019}}</ref> At the end of October 2019, construction had progressed to 49.05%.<ref>{{cite news |title=MRT Orange Line construction update October 2019 |url=https://www.facebook.com/MRTOrangeLineEast/photos/pcb.642832046196150/642831682862853 |website=MRTA PR |date=10 November 2019}}</ref>

At the end of January 2020, construction had progressed to 54.93%.<ref>{{cite news |title=MRT Orange Line construction update February 2020 |url=https://www.facebook.com/MRTA.PR/photos/a.1409211292628934/2436659376550782 |website=MRTA PR |date=7 February 2020}}</ref> By the end of May 2020, construction had progressed to 62.42%.
<ref>{{cite news |title=MRT Orange Line construction update June 2020 2023|url=https://www.facebook.com/MRTOrangeLineEast/photos/pcb.868116043667748/868111270334892 |website=MRTA PR |date=5 June 2020}}</ref> On 5 October 2020, TBM number 2 finished tunneling and reached Ramkhamhaeng 12 station box as part of contract 2.<ref>{{cite news |title=MRT Orange Line tunneling completed |url=https://www.facebook.com/watch/?v=262457361675721 |website=MAA Consultants Co Ltd |date=6 October 2020}}</ref> At the end of September 2020, was at 69.82%.<ref>{{cite news |title=MRT Orange Line construction update October 2020|url=https://www.facebook.com/MRTA.PR/photos/pcb.2627818000768251/2627816464101738 |website=MRTA PR |date=8 October 2020}}</ref>

At the end of January 2021, construction had progressed to 76.09%.<ref>{{cite news |title=MRT Orange Line construction update February 2021|url=https://www.facebook.com/MRTA.PR/photos/pcb.2627818000768251/2627816464101738 |website=MRTA PR |date=8 February 2021}}</ref> Construction progress was 81.03% by the end of April 2021.<ref>{{cite news |title=MRT Orange Line construction update May 2021|url=https://www.facebook.com/MRTA.PR/photos/pcb.2781073708776012/2781073418776041 |website=MRTA PR |date=7 May 2021}}</ref> Construction progress was 87.24% by the end of October 2021.<ref>{{cite news |title=MRT Orange Line construction update November 2021|url=https://www.facebook.com/MRTA.PR/photos/pcb.2843740849175964/2843724672510915/ |website=MRTA PR |date=6 November 2021}}</ref> By the end of March 2022, construction progress was at 92.69%.<ref>{{cite news |title=MRT Orange Line construction update April 2022|url=https://www.facebook.com/MRTOrangeLineEast/photos/a.258445614634797/1317224515423563 |website=MRTA PR |date=8 April 2022}}</ref> By the end of May 2022, construction had progressed to 94.51%.<ref>{{cite news |title=MRT Orange Line construction update June 2022|url=https://www.facebook.com/MRTOrangeLineEast/photos/a.258445614634797/1357270614752286 |website=MRTA PR |date=8 June 2022}}</ref> As of March 23 2023, construction had progressed to 99.00%<ref>{{cite web|url=https://www.facebook.com/MRTOrangeLineEast/posts/pfbid014QTa9Qww4Y1tfWgkCprPraGnsA5iQNdVAAzn6eEWmPe8TsRnWyPisw1tPA27tNkl|title=MRTA Orange Line East Construction Progress|access-date=5 April 2023}}</ref>

By the end of June 2023, construction had progressed to 100.00%.<ref>{{Cite web |title=The MRT Orange Line (East Section) |url=https://www.mrta-orangelineeast.com/en/home_progress |access-date=2024-10-28 |website=mrta-orangelineeast.com}}</ref>

{| class="wikitable" style="margin:auto;font-align:center;text-align:center;font-size:80%;&quot;"
|-
!span style="background:#{{rcr|MRT|Orange}}; color:black; |Contract
!span style="background:#{{rcr|MRT|Orange}}; color:black; | Notes
!span style="background:#{{rcr|MRT|Orange}}; color:black; |Contractor(s)
! style="background:#{{rcr|MRT|Orange}}; color:black; " span | Kilometre
!span style="background:#{{rcr|MRT|Orange}}; color:black; |Cost
|-
| E1
| align="left" |{{MRT Station Numbering|OR|13}} Thailand Cultural Centre to {{MRT Station Numbering|OR|16}} Ramkhamhaeng 12
| rowspan="2" |<abbr title="CH. Karnchang Public Company Limited">CK</abbr><abbr title="Sino-Thai Engineering and Construction">ST</abbr> Joint Venture
| 6.29
|฿20,633.00 million
|-
| E2
| align="left" |{{MRT Station Numbering|OR|16}} Ramkhamhaeng 12 to {{MRT Station Numbering|OR|19}} Hua Mak
| 3.44
|฿21,507.00 million
|-
| E3
| align="left" |{{MRT Station Numbering|OR|19}} Hua Mak to {{MRT Station Numbering|OR|22}} Klong Ban Ma
|[[Italian-Thai Development]]
| 4.04
|฿18,570.00 million
|-
| E4
| align="left" |{{MRT Station Numbering|OR|22}} Klong Ban Ma to {{MRT Station Numbering|OR|29}} Yaek Rom Klao
|Unique Construction and Engineering
| 8.8
|฿9,990.00 million
|-
| E5
| align="left" |Depot and Park & Ride
|<abbr title="CH. Karnchang Public Company Limited">CK</abbr><abbr title="Sino-Thai Engineering and Construction">ST</abbr> Joint Venture
! rowspan="2" |
|฿4,831.24 million
|-
| E6
| align="left" |Track and Electrical
|Unique Construction and Engineering
|฿3,690.00 million
|-
! colspan="4" |Total Budget
|'''฿79,221.24 million'''
|}

=== Western section ===
The Phase 2 Western extension of the Orange line will run from Thailand Cultural Centre to Bang Khun Non via Pratunam. The {{Cvt|13.4|km}} western section will run underground with 12 stations.

The Thai Cabinet was expected to approve the 121 billion baht budget for the Western extension in mid 2017 with a tender due for the 2nd half of 2017.<ref>{{cite news |date=26 May 2017 |title=B385bn Rail Projects expected to go ahead |url=http://www.bangkokpost.com/archive/b358bn-rail-projects-expected-to-go-ahead/1256406 |newspaper=Bangkok Post}}</ref> However, this decision was delayed until 2018 as Cabinet requested options to be considered for a joint public and private investment proposal.<ref>{{cite news |date=15 August 2017 |title=Ministry mulls Orange Line cost transfer |url=http://www.bangkokpost.com/news/transport/1306055/ministry-mulls-orange-line-cost-transfer |newspaper=Bangkok Post}}</ref> There were further delays into 2019, but the MRTA finalised a joint PPP plan for Cabinet to approve in mid 2019.<ref>{{cite news |date=7 May 2019 |title=B230bn for Orange Line |url=https://www.bangkokpost.com/business/tourism-and-transport/1673080/b230bn-for-orange-line |newspaper=Bangkok Post}}</ref> On 28 January 2020, the Cabinet approved the 142 billion baht extension. It was originally expected to open in February 2026 and serve 439,000 passengers daily.<ref name="tangled">{{cite news |last1=Theparat |first1=Chatrudee |date=30 October 2020 |title=Tangled lines |url=https://www.bangkokpost.com/property/2011035/tangled-lines |access-date=31 October 2020 |agency=Bangkok Post}}</ref><ref>{{cite news |date=29 January 2020 |title=MRT extension approved |url=https://www.bangkokpost.com/business/1845704/mrt-extension-approved |newspaper=Bangkok Post}}</ref>

On 3 July 2020, the MRTA released the tender for the design, construction and operation of the Western extension as a Public-Private Partnership project on a 30 year lease.<ref name="MRT Orange Line extension tender" /> The tender deadline was 23 September 2020 with the successful bidder to be announced in early October 2020. The tender specified a construction period of 3 and a half years.

There were 10 tenderers that purchased the request for proposal (RFP) form with two major consortiums that submitted final bids:

* Bangkok Expressway and Metro Public Company Limited (BEM) - operator of the [[MRT Blue Line]] and [[MRT Purple Line]]s.
* BSR Consortium, led by Bangkok Mass Transit System Public Company Limited (BTSC), and supported by BTS Group Holdings (BTS Group) and Sino-Thai Engineering and Construction (STECON). BTSC is the operator of the [[MRT Pink Line]] and [[MRT Yellow Line]]s.

However, in late August 2020 the tender submission deadline was subsequently delayed by the MRTA.<ref name="prachachat.net" /> Thereafter, the MRTA amended the tender assessment criteria resulting in a lawsuit being lodged by the BTSC in the Administrative Court on 17 September 2020 with the Court imposing an injunction suspending the tender decision.<ref name="ด่วน! ศาลสั่งคุ้มครองบีทีเอส ให้ รฟ" /> The tender was subsequently cancelled by the MRTA in February 2021 due to litigation by the BTSC.<ref name="ภคพงศ์ ศิริกันทรมาศ ไขปมล้มประมูล" /> After approval by the Administrative Court given ongoing litigation, a new tender issued in October has a deadline for bids of January 2022.<ref name="bangkokbiznews.com" />

The Criminal Court Corruption and Malfeasance division hearings into the cancelled tender process were conducted from 14 to 24 December 2021 and have delayed the reissued tender timeframe.<ref>{{cite news |date=25 October 2021 |title=ศาลอาญาคดีทุจริตรับคำฟ้อง!! "บีทีเอสร้องรถไฟฟ้าสีส้ม" |url=https://www.facebook.com/TransportDailynews/posts/3031000807121417 |newspaper=Daily News}}</ref> Subject to court approval, the MRTA planned to review all tender bids for a period of 3 months before seeking final Cabinet approval of the winning bid in April 2022.  However, there are also construction budget concerns for the extension as steel prices have increased by 40% since the previous budget was approved.<ref>{{cite news |date=16 May 2021 |title=สายสีส้มลากยาว ดันต้นทุนก่อสร้างพุ่ง |url=https://www.thansettakij.com/content/Macro_econ/479779 |newspaper=Thansettakij News}}</ref> The EIA for the western extension was also updated in December 2021 as Din Daeng station was moved north by 500m, Pracha Songkhro station was moved east by 450m and Yommarat station was redesigned.<ref>name="https://www.facebook.com/photo?fbid=1042977602926946&set=pcb.1042980006260039 ''National Environment Board'', 20 December 2021</ref>

The MRTA reissued the new tender auction on 24 May 2022 with tender packages available for purchase until 10 June.<ref name="dailynews.co.th" /> The 141 billion baht western extension consists of 86 billion baht for civil works, 14 billion for land appropriation and 31 billion for systems installation, rolling stock and maintenance. The winning bidder was announced by the MRTA on 9 September 2022 with BEM winning the right to build and run the extension over the ITD consortium.<ref name="bangkokpost.com" />

On 18 July 2024, construction contracts were signed at the MRTA office. The Minister of Transport, [[Suriya Juangroongruangkit]], instructed [[Mass Rapid Transit Authority of Thailand|MRTA]] and [[Bangkok Expressway and Metro|BEM]], the concession holder, to expedite the track and electrical works on the Orange Line's eastern section from the [[Thailand Cultural Centre MRT station|Thailand Cultural Centre]] to Yaek Rom Klao for completion as soon as possible. The primary objective is to open the eastern section by early 2028, with the western section set to be completed ahead of schedule by November 2028. It was confirmed that the Orange Line’s maximum fare will be capped at 20 Baht or with a flat rate of 20 Baht for the entire route.<ref>{{Cite news |date=18 July 2024 |title=รฟม.-BEM ลงนามก่อสร้างสายสีส้มตะวันตก ‘สุริยะ’ สั่งเดินรถช่วงมีนบุรี ภายในปี’71 – ราคา 20บ.ตลอดสาย |url=https://www.matichon.co.th/economy/news_4688018 |work=Matichon Online}}</ref>

{| class="wikitable" style="margin:auto;font-align:center;text-align:center;font-size:80%;&quot;"
|-
! style="background:#{{rcr|MRT|Orange}}; color:black; " span |Contract
! style="background:#{{rcr|MRT|Orange}}; color:black; " span | Notes
! style="background:#{{rcr|MRT|Orange}}; color:black; " span |Contractor(s)
! style="background:#{{rcr|MRT|Orange}}; color:black; " span | Kilometre<br />(km)
! style="background:#{{rcr|MRT|Orange}}; color:black; " span |Progress<br />(April 2025)
! style="background:#{{rcr|MRT|Orange}}; color:black; " span |Cost
|-
| '''1'''
| align="left" |{{MRT Station Numbering|OR|02}} Bang Khun Non to {{MRT Station Numbering|OR|13}} Thailand Cultural Centre
| rowspan="2" |[[CH. Karnchang|CH. Karnchang Public Company limited]]
| 13.1
|8.91%
|฿82,501.869 million
|-
| '''2'''
| align="left" |M&E Works and Rolling Stocks
!
|3.74%
|฿26,714.000 million
|-
! colspan="4" |'''Total Budget'''
|'''8.31%''' <ref>{{Cite web |title=Facebook |url=https://www.facebook.com/photo/?fbid=122130110510701333&set=pcb.122130110888701333 |access-date=2025-05-08 |website=www.facebook.com}}</ref>
|'''฿109,215.869 million'''
|}

==== Discovery of human remains at Siriraj Station site ====
On March 18, 2025, archaeologists made a remarkable discovery during an excavation at the construction site of Siriraj Station. Over 70 human skeletons were unearthed beneath the Arun Amarin Bridge, opposite [[Wat Amarinthraram|Wat Amarin]], along with a large ceramic jar containing cremated bone fragments. This discovery, made as part of a mandated archaeological survey by the [[Fine Arts Department]] prior to the [[Siriraj Hospital|Siriraj hospital]] expansion, has drawn significant attention from historians and researchers.

The burials show unique and previously unrecorded characteristics in Thai archaeology: bodies were laid in an extended position with slightly bent legs, heads oriented westward, and faces tilted southward. Some of the remains were found in alarming postures with hands and feet bound behind their backs, suggesting possible [[mass execution]].

Preliminary assessments date the remains to approximately 200–500 years ago, potentially linking them to the [[Thonburi Kingdom|Thonburi period]]. Experts speculate that this site may be tied to mass executions during the turbulent years before the establishment of [[Bangkok]] as the capital in 1782. However, further bone dating and DNA testing are required to confirm the period and possible links to pre-[[Rattanakosin Kingdom (1782–1932)|Rattanakosin]] communities.

The site itself lies within a historically significant area once part of Wang Lang Palace , built around 200 years ago, and may overlap with an ancient settlement dating back 2,000–3,000 years. The discovery of numerous cremation jars alongside the skeletons suggests complex and varied mortuary practices, indicating cultural and ritual significance.

The [[Mass Rapid Transit Authority of Thailand]] has confirmed the site is under continued investigation by the [[Fine Arts Department]]. If further research verifies early historical connections, the discovery could significantly reshape the understanding of [[Thonburi|Thonburi’s]] and [[Bangkok|Bangkok’s]] origins.<ref>{{Cite web |title=Facebook |url=https://www.facebook.com/photo?fbid=122125109024701333&set=a.122106781052701333 |access-date=2025-04-09 |website=www.facebook.com}}</ref><ref>{{Cite news |last=Reporters |first=Post |date=2025-04-04 |title=Old bones at MRT station site hint at ancient executions |url=https://www.bangkokpost.com/thailand/general/2995977/old-bones-at-mrt-station-site-hint-at-ancient-executions |access-date=2025-04-09 |work=Bangkok Post |language=en}}</ref>

==Rolling stock==
The tender for operation of the line and purchase of rolling stock for both the eastern and western sections was issued in May 2022, along with the construction of the western section.<ref>{{cite news |title=เปิดทีโออาร์ สายสีส้ม "เข้มสเปก" ซองเทคนิค BTS-BEM พร้อมสู้ศึกประมูล |url=https://www.bangkokbiznews.com/business/1006463 |archive-url=https://web.archive.org/web/20220627215405/https://www.bangkokbiznews.com/business/1006463 |archive-date=2022-06-27  |access-date=27 June 2022 |work=กรุงเทพธุรกิจ}}</ref> However, it was delayed due to the ongoing litigation regarding the western extension, and the tender was suspended. In July 2024, it was announced at the signing ceremony of the joint investment contract for the Orange Line that they planned to have 32 electric trains, each with 3 carriages.<ref>{{Cite web |last=Siripanjana |first=Maneerat |title=วันนี้ที่รอคอย! ลงนามร่วมทุน "สายสีส้ม" เร่งเปิดเดินรถปลายปี 70 ของขวัญปีใหม่ประชาชน |url=https://www.dailynews.co.th/news/3658119/ |access-date=2024-07-18 |website=เดลินิวส์ |language=th}}</ref>

In October 2024, [[Bangkok Expressway and Metro|BEM]] has concluded its selection by choosing [[Siemens]] as the manufacturer for the Orange Line trains.<ref>{{Cite web |last=จิราสิต |first=จิรา |title=BEMเลือก"ซีเมนส์"ผลิตรถไฟฟ้าสายสีส้ม32 ขบวนทยอยนำมา16ขบวนบริการปลายปี70 |url=https://www.dailynews.co.th/news/4017781/?fbclid=IwY2xjawGMZBNleHRuA2FlbQIxMAABHUBSj5kh7ZFAnx3v-Z65xb-muzX6kYZermbPsnZp55rz_CpL6p3xSKzmIg_aem_EoBbaz5gjP1Qp1uNXfsYpg |access-date=2024-10-28 |website=เดลินิวส์ |language=th}}</ref>  The turnkey contract was announced on December 18, 2024. A consortium consisting of Siemens, [[Bozankaya]], and [[ST Engineering|ST Engineering Thailand]] won a contract from Ch. Karnchang. The contract includes the supply of 32 [[Siemens]] three-car trains, with the configuration and design same as the EMU-BLE fleet used on the [[MRT Blue Line]] in Bangkok. These trains will be manufactured at the Bozankaya Factory in Ankara, [[Turkey]]. Siemens and ST Engineering will supply the bogies, traction, braking, auxiliary systems, and SCADA system for the project, and will be responsible for project management, development, construction, and commissioning. Siemens will also provide service and maintenance for 10 years.<ref>{{Cite web|title=Siemens Mobility and Consortium Partners Secure Important Rail Contracts in Thailand to Transform Public Transportation |url=https://press.siemens.com/global/en/pressrelease/siemens-mobility-and-consortium-partners-secure-important-rail-contracts-thailand |access-date=2024-12-18 |website=Siemens Mobility |language=en}}</ref>

==Stations==

{{see|List of rapid transit stations in Bangkok}}
{| class="wikitable" style="margin:auto;font-align:center;text-align:center;font-size:80%;&quot;"
|-
!span style="background:#{{rcr|MRT|Orange}}; color:black;" rowspan="2" |Code
! span style="background:#{{rcr|MRT|Orange}}; color:black;" colspan="2" |Station Name
! span style="background:#{{rcr|MRT|Orange}}; color:black;"rowspan="2" |Opened
! span style="background:#{{rcr|MRT|Orange}}; color:black;"rowspan="2" |Platform Type
! span style="background:#{{rcr|MRT|Orange}}; color:black;"rowspan="2" |Position
! span style="background:#{{rcr|MRT|Orange}}; color:black;"rowspan="2" |Park
&
Ride
! span style="background:#{{rcr|MRT|Orange}}; color:black;"rowspan="2" |Transfer
! span style="background:#{{rcr|MRT|Orange}}; color:black;"rowspan="2" |Notes
|-
! span style="background:#{{rcr|MRT|Orange}}; color:black;"|English
! span style="background:#{{rcr|MRT|Orange}}; color:black;"|Thai
|-
! colspan=9 |Taling Chan - Bang Khun Non: 4.54 km <small>(Future)</small>
|-
|{{MRT Station Numbering|OR|01}}
|[[Taling Chan railway station|Taling Chan]]
|ตลิ่งชัน
|''TBA''
|Island
|Underground
| -
| align="left" | '''Connecting station''' to;<br />• {{Rint|bangkok|Silom}} <small>(1 km walking distance; ''future'')</small>• {{Rint|bangkok|LightRed}}<br />• [[Southern Line (Thailand)|SRT Southern Line]]
| align="left" |Appeared on the 2022 Final Reports.<ref name=":0">{{Cite web |title=MRT Orange Line western section final reports |url=https://www.mrta.co.th/storage/content/uploads/1677663955%E0%B8%A3%E0%B8%B2%E0%B8%A2%E0%B8%87%E0%B8%B2%E0%B8%99%E0%B8%89%E0%B8%9A-%E0%B8%9A%E0%B8%AA%E0%B8%A1%E0%B8%9A-%E0%B8%A3%E0%B8%93-%E0%B8%89%E0%B8%9A-%E0%B8%9A%E0%B8%AB%E0%B8%A5-%E0%B8%81-%E0%B8%9B%E0%B8%81%E0%B8%9B-%E0%B8%94.pdf |archive-url=}}</ref>
|-
! colspan="9" |Bang Khun Non - Thailand Cultural Centre: 13.2 km <small>(Under construction)</small>
|-
|{{MRT Station Numbering|OR|02}}
|[[Bang Khun Non MRT station|Bang Khun Non]]
|บางขุนนนท์
| rowspan="11" |{{Start date and age|2030|11|df=y}}
|Island
| rowspan="11" |Underground
| -
| align="left" |'''Connecting station''' to;<br />• {{Rint|bangkok|Blue}}<br />• {{Rint|bangkok|LightRed}} <small>''(future)''</small>
|
|-
|{{MRT Station Numbering|OR|03}}
|[[Siriraj MRT station|Siriraj]]
|ศิริราช
|Stacked
| -
| align="left" |'''Connecting station''' with {{Rint|bangkok|LightRed}} <small>''(future)''</small>
| align="left" |'''Exit to''' [[Siriraj Hospital]].
|-
|{{MRT Station Numbering|OR|04}}
|[[Sanam Luang MRT station|Sanam Luang]]
|สนามหลวง
|Island
| -
|
| align="left" |'''Exit to:'''<br />• [[Sanam Luang]]<br />• [[Grand Palace|The Grand Palace]]<br />• [[Khaosan Road]]<br />• [[National Theatre (Thailand)|National Theatre]]
|-
|{{MRT Station Numbering|OR|05}}
|[[Democracy Monument MRT station|Democracy Monument]]
|อนุสาวรีย์ประชาธิปไตย
|Island
| -
| align="left" |'''Interchange station''' to {{Rint|bangkok|Purple}} <small>''(under construction)''</small>
| align="left" |'''Exit to''':<br />• Mahakan fort<br />• Rattanakosin Exhibition Hall<br />• [[Queen Sirikit Gallery]]<br />• Royal Pavilion Mahajetsadabadin<br />• [[Wat Saket]].
|-
|{{MRT Station Numbering|OR|06}}
|[[Lan Luang MRT station|Lan Luang]]
|หลานหลวง
|Island
| -
|
|
|-
|{{MRT Station Numbering|OR|07}}
|[[Yommarat MRT station|Yommarat]]
|ยมราช
|Island
| -
| align="left" |'''Connecting station''' to {{Rint|bangkok|DarkRed}} <small>''(future)''</small>
|
|-
|{{MRT Station Numbering|OR|08}}
|[[Ratchathewi BTS Station|Ratchathewi]]
|ราชเทวี
|Island
| -
| align="left" |'''Connecting station''' to {{Rint|bangkok|LightGreen}}
|
|-
|{{MRT Station Numbering|OR|09}}
|[[Pratunam MRT station|Pratunam]]
|ประตูน้ำ
|Stacked
| -
|
| align="left" |'''Exit to''':<br />• [[Embassy of Indonesia, Bangkok|Embassy of Indonesia]]<br />• Platinum Fashion Mall.
|-
|{{MRT Station Numbering|OR|10}}
|[[Ratchaprarop Station (Airport Rail Link)|Ratchaprarop]]
|ราชปรารภ
|Stacked
| -
| align="left" |'''Connecting station''' to<br />• {{Rint|bangkok|ARL}}<br />• {{Rint|bangkok|LightRed}} <small>''(future)''</small><br />• [[Eastern Line (Thailand)|SRT Eastern Line]]
| align="left" |'''Exit to''':<br />• [[Pratunam Market]]<br />• Indra Square<br />• [[Baiyoke Tower II|Baiyoke Tower]].<br /><small>The station site has been moved 300 meters north to replace Rangnam station.</small><ref name=":0" />
|-
|{{MRT Station Numbering|OR|11}}
|[[Din Daeng MRT station|Din Daeng]]
|ดินแดง
|Island
| -
|
| align="left" |'''Exit to''' Bangkok City Hall 2.
|-
|{{MRT Station Numbering|OR|12}}
|[[Pracha Songkhro MRT station|Pracha Songkhro]]
|ประชาสงเคราะห์
|Side
| -
| align="left" |'''Connecting station''' to {{Rint|bangkok|LightBlue}} <small>''(future)''</small>
|
|-
! colspan="9" |Thailand Cultural Centre - Yaek Rom Klao: 21.04 km <small>(Structure Complete)</small>
|-
|{{MRT Station Numbering|OR|13}}
|[[Thailand Cultural Centre MRT Station|Thailand Cultural Centre]]
|ศูนย์วัฒนธรรมแห่งประเทศไทย
| rowspan="17" |{{Start date and age|2028|05|df=y}}
|Side
| rowspan="10" |Underground
|√
| align="left" |'''Interchange station''' to {{Rint|bangkok|Blue}}
| align="left" |'''Exit to''':<br />• The One Ratchada Market<br />• Esplanade Ratchada<br />• The Street Ratchada<br />• China Cultural Centre<br />• [[Thailand Cultural Centre]].
|-
|{{MRT Station Numbering|OR|14}}
|[[MRTA MRT station|MRTA]]
|รฟม.
|Island
| -
|
| align="left" |'''Exit to''' [[Royal City Avenue|Royal City Avenue (RCA)]].
|-
|{{MRT Station Numbering|OR|15}}
|[[Wat Phra Ram 9 MRT station|Wat Phra Ram 9]]
|วัดพระราม 9
|Stacked
| -
| align="left" |'''Connecting station''' to {{Rint|bangkok|Grey}} <small>''(future)''</small>
| align="left" |<small>''Formerly Pradit Manutham.''</small>
|-
|{{MRT Station Numbering|OR|16}}
|[[Ramkhamhaeng 12 MRT station|Ramkhamhaeng 12]]
|รามคำแหง 12
|Stacked
| -
|
| align="left" |'''Exit to''' [[The Mall Group|The Mall Ramkhamhaeng]].
|-
|{{MRT Station Numbering|OR|17}}
|[[Ramkhamhaeng University MRT station|Ramkhamhaeng University]]
|มหาวิทยาลัยรามคำแหง
|Stacked
| -
|
| align="left" |'''Exit to''' [[Ramkhamhaeng University]].
<small>''Formerly Ramkhamhaeng.''</small>
|-
|{{MRT Station Numbering|OR|18}}
|[[SAT MRT station|SAT]]
|กกท.
|Island
| -
|
| align="left" |'''Exit to''':<br />• Hua Mak Sports Complex (which includes the head office of SAT ([[Sports Authority of Thailand]]) , [[Rajamangala Stadium]] and [[Indoor Stadium Huamark]])
|-
|{{MRT Station Numbering|OR|19}}
|[[Ramkhamhaeng 40 MRT station|Ramkhamhaeng 40]]
|รามคำแหง 40
|Island
| -
|
| align="left" |<small>''Formerly Hua Mak and Ramkhamhaeng 34.''</small><ref>{{Cite web |title=Facebook |url=https://www.facebook.com/photo?fbid=995525951934479&set=pcb.995528115267596 |access-date=2025-02-10 |website=www.facebook.com}}</ref>
|-
|{{MRT Station Numbering|OR|20}}
|[[Yaek Lam Sali MRT station|Yaek Lam Sali]]
|แยกลำสาลี
|Island
| -
| align="left" |'''Connecting station''' to;<br />• {{Rint|bangkok|Yellow}}<br />• {{Rint|bangkok|Brown}} <small>''(future)''</small>
| align="left" |<small>''Formerly Lam Sali.''</small>
|-
|{{MRT Station Numbering|OR|21}}
|[[Si Burapha MRT station|Si Burapha]]
|ศรีบูรพา
|Island
| -
|
|
|-
|{{MRT Station Numbering|OR|22}}
|[[Khlong Ban Ma MRT station|Khlong Ban Ma]]
|คลองบ้านม้า
|Side
|√
|
|
|-
|{{MRT Station Numbering|OR|23}}
|Sammakorn
|สัมมากร
|Side
| rowspan="7" |Elevated
| -
|
|
|-
|{{MRT Station Numbering|OR|24}}
|[[Nom Klao MRT station|Nom Klao]]
|น้อมเกล้า
|Side
| -
|
|
|-
|{{MRT Station Numbering|OR|25}}
|[[Rat Phatthana MRT station|Rat Phatthana]]
|ราษฎร์พัฒนา
|Side
| -
|
|
|-
|{{MRT Station Numbering|OR|26}}
|[[Min Phatthana MRT station|Min Phatthana]]
|มีนพัฒนา
|Side
| -
|
|
|-
|{{MRT Station Numbering|OR|27}}
|[[Kheha Ramkhamhaeng MRT station|Kheha Ramkhamhaeng]]
|เคหะรามคำแหง
|Side
| -
|
|
|-
|{{MRT Station Numbering|OR|28}}
|[[Min Buri MRT station|Min Buri]]
|มีนบุรี
|Side
|√
| align="left" |'''Interchange station''' with {{Rint|bangkok|Pink}}
|
|-
|{{MRT Station Numbering|OR|29}}
|[[Yaek Rom Klao MRT station|Yaek Rom Klao]]
|แยกร่มเกล้า
|Side
| -
|
| align="left" |<small>''Formerly Suwinthawong.''</small>
|}
Note: In February 2020, the MRTA changed the names of 3 stations {{MRT Station Numbering|OR|19}}, {{MRT Station Numbering|OR|20}}, and {{MRT Station Numbering|OR|29}}.<ref>{{cite news |title=รฟม. สั่งเปลี่ยนชื่อ สถานีรถไฟฟ้า 4 สาย หวังให้ประชาชนจำง่ายขึ้น |url=https://www.khaosod.co.th/special-stories/news_3617443 |website=Khaosod Online |date=21 February 2020}}</ref>

== Route map ==
{{Wide image|MRT Orange Line Map 2024 fixed.svg|1600px}}

== Incidents ==
On 19 May 2025, a 50-year-old construction worker died after falling into a 19-metre-deep excavation shaft at the Lan Luang Station construction site in Bangkok. His body was recovered on 24 May, following five days of continuous search and recovery operations. The incident prompted an official investigation by the Mass Rapid Transit Authority of Thailand (MRTA) and reignited public concern over occupational safety and regulatory oversight on large-scale infrastructure projects.<ref>{{Cite web |date=2025-05-20 |title=MRTA clarifies worker falling into 19-metre-deep hole at Orange Line site |url=https://www.nationthailand.com/thailand/bangkok/40050199 |access-date=2025-05-24 |website=nationthailand |language=en-US}}</ref><ref>{{Cite web |date=2025-05-19 |title=คนงานพลัด 'ตกหลุม' ก่อสร้าง รถไฟฟ้าสายสีส้ม สถานีหลานหลวง ลึก 19 เมตร |url=https://thestandard.co/worker-falls-19m-orange-line-pit/ |access-date=2025-05-24 |website=THE STANDARD |language=th}}</ref><ref>{{Cite web |title=พบแล้ว ร่างคนงานตกหลุมเสาเข็ม ไซต์รฟฟ.หลานหลวง เตรียมใช้เครน พร้อมโรยตัวกู้ร่าง |url=https://www.honekrasae.com/content/yzxWPuwm9UvR0pXAW4yq?force=1&fbclid=IwY2xjawKencJleHRuA2FlbQIxMABicmlkETFGbHVSdUR1eUROMUVNd1F2AR7jfdxYlV9yxtP4whpwNMJIiq8XyLxw2M_TYfO7JNfNA3-_7E_w3bWChhW1Kg_aem_9jXZX4_NKagUBpt3EBDeTQ |access-date=2025-05-24 |website=มาร่วมตีแผ่กระแสข่าวที่แรงที่สุดในสังคม |language=th}}</ref>

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

== See also==
{{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 Pink Line]]
* [[MRT Purple Line]]
* [[MRT Yellow Line]]
* [[BTS Skytrain]]
* [[Sukhumvit Line]]
* [[Silom Line]]
* [[Airport Rail Link (Bangkok)]]
* [[SRT Dark Red Line]]
* [[SRT Light Red Line]]
* [[Bangkok BRT]]
* [[Gold Line (Bangkok)|BMA Gold Line]]
* [[Bang Na–Suvarnabhumi light rail|BMA Bang Na-Airport Line]]
{{Div col end}}

== References ==
<references/>

== External links ==
{{Commons category|MRT Orange Line}}

* [https://mrta-orangelineeast.com/en/home "MRT Orange Line Eastern Section"]
* [https://www.bts.co.th/eng/routemap.html Airport Rail Link, BTS, MRT & BRT network map]
* [https://www.mrta.co.th/th/ MRTA]

{{Bangkok Rapid Transit stations
|Orange=yes
}}
{{Public transport in Bangkok}}
{{Urban Rail Transit in ASEAN}}

{{DEFAULTSORT:Mrt Orange Line}}
[[Category:Proposed public transport in Thailand]]
[[Category:MRT (Bangkok) lines|Orange line]]
[[Category:2028 in rail transport]]