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Pink Line
สายสีชมพู
A Pink Line Innovia Monorail 300 train at Lak Si Station
Overview
StatusPublic operation
OwnerMass Rapid Transit Authority of Thailand
LocaleNonthaburi and Bangkok, Thailand
Termini
Stations32
Service
TypeMonorail
SystemMetropolitan Rapid Transit
Operator(s)Northern Bangkok Monorail Company Limited
(Subsidiary of BSR Consortium)
Depot(s)Min Buri Depot
Rolling stockAlstom Innovia Monorail 300
30 four-cars trains
Daily ridership53,679 (2024)[1]
History
Commenced16 June 2017; 8 years ago (2017-06-16)
Opened23 November 2023; 23 months ago (2023-11-23) (Trial Run)
7 January 2024; 21 months ago (2024-01-07) (Full commercial service)
Last extension20 May 2025; 5 months ago (2025-05-20) (Muang Thong Thani Line, Public Trial Operation)
Technical
Line length37.30 kilometers (23.18 mi)
CharacterFully Elevated
Electrification750 V DC
Operating speed80 km/h (50 mph)
SignallingBombardier CITYFLO 650 moving block CBTC ATC under ATO GoA 4 (Fully Automated Train Control), with subsystems of ATP, ATS and CBI[2]
Route map

Legend
 MRT 
← Tao Poon
Khlong Bang Phai →
PK01
Nonthaburi
Civic Center
 MRT  (planned)
PK02
Khae Rai
PK03
Sanambin Nam
PK04
Samakkhi
PK05
Royal Irrigation Department
PK06
Yaek Pak Kret
PK07
Pak Kret Bypass
PK08
Chaeng Watthana - Pak Kret 28
PK09
Si Rat
MT02
Lake Muang Thong Thani
MT01
Impact Muang Thong Thani
PK10
Muang Thong Thani
PK11
Chaeng Watthana 14
PK12
Government Complex
PK13
National Telecom
PK14
Lak Si
 SRT 
← Krung Thep Aphiwat
Rangsit →
PK15
Rajabhat Phranakhon
PK16
Wat Phra Sri
Mahathat
 BTS 
← Kheha
Khu Khot →
PK17
Ram Inthra 3
PK18
Lat Pla Khao
PK19
Ram Inthra Kor Mor 4
PK20
Maiyalap
PK21
Vacharaphol
 MRL  ← Tha Phra
PK22
Ram Inthra Kor Mor 6
PK23
Khu Bon
PK24
Ram Inthra Kor Mor 9
PK25
Outer Ring Road - Ram Inthra
PK26
Nopparat
PK27
Bang Chan
PK28
Setthabutbamphen
PK29
Min Buri Market
PK30
Min Buri
 MRT 
← Bang Khun Non
Yaek Rom Klao →
depot
This diagram:
A typical ticket office of the Pink Line
Fare gates in Royal Irrigation Department Station
Signage at Khae Rai Station

The MRT Pink Line (Thai: รถไฟฟ้ามหานคร สายสีชมพู) is an elevated monorail line of the MRT in Bangkok and Nonthaburi Province, Thailand. The monorail line is 34.5 kilometres (21.4 mi) long and has 30 stations.[3] It runs in the northern part of the Bangkok Metropolitan Area from Nonthaburi Civic Center in Pak Kret district, Nonthaburi along the major east–west transport corridor of Highway 304 (Chaeng Wattana and Ram Inthra roads) to terminate at Min Buri in Min Buri district in east Bangkok. It opened for free public trial operation on 21 November 2023[4] with then Prime Minister Srettha Thavisin taking the inaugural ride.[5]

The line is designed to link the northern areas of Bangkok and Nonthaburi by connecting with three existing and three future mass transit lines. At Nonthaburi Civic Center the line interchanges with the MRT Purple Line and the proposed MRT Brown Line. The line also interchanges with the SRT Dark Red Line, the BTS Sukhumvit Line and the planned BMA Grey Line. At the Min Buri terminus, the line interchanges with the MRT Orange Line.

Construction of the Pink Line began in December 2017. In October 2020, the BSR consortium stated that they aimed to open the first section of the Pink Line by October 2021, with services initially operating from Min Buri (PK30) to Government Complex (PK12). The complete line was originally set to be fully open by June 2022.[6] However, the outbreak of COVID-19 in Bangkok and changes to station locations delayed the opening date. On 24 September 2021, the MRTA Board granted a 290-day extension to the construction contract period.[7] In November 2021, the MRTA Board approved a new phased opening of the line starting from August 2022. On 9 December 2021, daily testing conducted at a maximum speed of 25 km/h (16 mph) began on a short 4 km (2.5 mi) section of the line between the depot at Min Buri and Bang Chan station. After a period of 3 months, testing was conducted at higher speeds and along a longer section of track.[8]

In April 2022, the acting Director-General of the Department of Rail Transport stated that the line would not begin full testing until September 2022 and that the first stage would not open until late December 2022.[9] In May 2023, a further 345-day extension was announced by the MRTA, delaying the start of trial operations for the initial section and later the final opening of the full line to June 2024.[10] However, after the opening of the MRT Yellow line the BSR announced that the first section of the line would open in November 2023.[11]

The line opened for free public trial operation on 21 November 2023 and officially launched on 18 December 2023.[4] Revenue service was initially scheduled to begin on 3 January 2024,[12] but an incident involving conductor rails resulted in a delay to 7 January, with a 15 percent discount for travels between Royal Irrigation Department and Min Buri, and the first four stations will be free of charge, running only in one direction on rails unaffected by the incident as a shuttle service, while the affected rails are being repaired.[13]

On 20 May 2025, Muang Thong Thani Line, a branch line from the main Pink Line, began free trial operations between Muang Thong Thani and Lake Muang Thong Thani stations. Full commercial operation will begin on 17 June 2025.[14]

Route alignment

[edit]

The line begins at Nonthaburi Civic Center near Khae Rai Junction, Nonthaburi Province, in the northwest of Greater Bangkok. The line then heads north along Tiwanon Road to Pak Kret Intersection, Pak Kret District, before turning east to run along Chaeng Watthana road. It interchanges with the SRT Dark Red Line at Lak Si Station and passes over Vibhavadi Rangsit Road running east through the Ram Intra intersection and the Lak Si Monument in Bang Khen District, where it crosses under the BTS Sukhumvit Line and interchanges with Wat Phra Sri Mahathat. The line then continues farther east along Ram Inthra Road to the northeast of Bangkok before terminating at Min Buri station where it will interchange with the MRT Orange Line once the line open.

History

[edit]

The Pink Line was first proposed in 2005 by the Office of Transport and Traffic Policy and Planning as a heavy rail underground line. It was changed to a monorail line in 2008 to reduce construction costs. The director-general of the Office of Transport and Traffic Policy and Planning had previously stated in an interview that the Pink Line was considered a priority scheme to be completed by 2017–18, as it ran past the then recently opened Bangkok Government Complex.[15] A review was undertaken in early 2012 to reconsider the heavy rail option, but cost restraints prevailed and the Office decided to continue with the monorail plan. The review of the line did result, however, in the addition of 6 new stations. The environmental impact assessment for the Pink Line was finalized in late 2012. In October 2012, members of the new government requested to extend the planned line east by 3.4 km (2.1 mi) beyond the Min Buri terminus to Nong Chok.[16] However, this extension of the line was not approved. The expected cost of the line in 2012 with the additional 6 extra stations was 55 billion baht.[17]

The Pink line was due to be tendered in the third quarter of 2013 with construction due to commence in early 2014.[18] However, delays in preparation of the tender in relation to the selection of monorail rolling stock and political protests resulting in a snap national election in early Feb 2014 further delayed the Pink Line tender.[19] 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 Pink line tender was then changed to a PPP tender process which was not released until mid 2016.

The BSR consortium consisting of BTS Group Holdings (75% majority stake) with Sino-Thai Engineering and Construction (STEC), and Ratch Group (RATCH) won the bid in early December 2016 to construct and operate the Pink Line.[20] The BSR consortium won the bid for a 30-year concession operate the line and also won the bid to build and operate the MRT Yellow Line.

On 16 June 2017, contracts were signed by the BSR consortium with the Mass Rapid Transit Authority of Thailand.[21] The BSR established the Northern Bangkok Monorail Company Limited (NBM) to operate the line.

Muang Thong Thani Line

[edit]
Monorail in Muang Thong Thani

The Pink Line extension to Muang Thong Thani,[a] or Muang Thong Thani Line, is a spur line of the Pink Line linking to the Muang Thong Thani development and its Impact exhibition and convention center.

Construction of the extension, which was wholly funded by Northern Bangkok Monorail, the construction and operation concessionaire for the main Pink Line, began in June 2022. It unofficially opened for trial runs on 20 May 2025.

Muang Thong Thani Line history

[edit]

In 2016, a proposal was made to link Muang Thong Thani to the then-proposed MRT Pink Line. Accordingly, BSR Joint Venture—the consortium led by BTS Group Holdings which had won the bid to construct and operate the line—proposed a 2.8 km (1.7 mi), two-station spur monorail route to link to Impact, Muang Thong Thani from what was then Si Rat station (now Muang Thong Thani MRT station; the names were later switched).[22] The two stations were to be located adjacent to the Impact Challenger building, and near Muang Thong Thani Lake and the Impact Forum. In early August 2018, a second public hearing was conducted by the MRTA into the extension proposal.[23]

The spur line proposal required a new EIA, which was completed in August 2020.[24] The proposal was then presented to the Cabinet for approval to commence construction before the end of 2020.[25] On 22 October 2020, the National Environment Board chaired by the Deputy PM approved the EIA and the MRTA evaluated construction costs of the spur line with BSR, with the final proposal proposed to be presented to Cabinet for approval by the end of November 2020.[26] On 9 February 2021, Cabinet approved the 2.8 km (1.7 mi) spur line which was expected to cost 3.37 billion baht, wholly contributed by BSR through its subsidiary Northern Bangkok Monorail.[27] Construction of the spur line was due to commence in July 2021. However, due to COVID-19 outbreaks in greater Bangkok construction was delayed until after December 2021. Finally, on 20 June 2022 the MRTA issued a Notice to Proceed for the now 4.2 billion baht spur line and soon after construction commenced.[28]

The construction marked the first business partnership between BTS Group and Bangkok Land (the developer of Muang Thong Thani), each of which is controlled by members from one of two branches of the Kanjanapas family.[29][30]

By the end of January 2023, civil works construction had progressed to 16.15%.[31] By the end of May 2023, construction had progressed to 27.77%.[32] The MRTA may also consider a further 2 km (1.2 mi) extension in the future from Muang Thong Thani to Tiwanon road.[33]

The Muang Thong Thani Line (formerly unofficially known as the Impact Spur Line) opened to the public for a trial run on 20 May 2025, with full commercial service expected to begin on 17 June 2025.[14][34]

Muang Thong Thani Line route

[edit]

The Muang Thong Thani spur line branches off from the main Pink Line at Muang Thong Thani MRT station on Chaeng Watthana Road, where it is served by a single platform. It turns into Soi Chaengwattana-Pak Kret 39 (one of the main roads into Mueang Thong Thani) and climbs above the Udon Ratthaya Expressway to run between its two sides, along the median of Soi Chaengwattana-Pak Kret 39, Impact Muang Thong Thani station then passes above the expressway again before terminating at Lake Muang Thong Thani station. Like the main line, the Muang Thong Thani line is dual track, with switches near the Muang Thong Thani and Lake Muang Thong Thani stations to facilitate turnbacks.

List of stations

[edit]

Originally, the line was designed with 24 stations, two of which with a park and ride facility. However, six new stations were added in mid-2012 for a total of 30 stations.

Code Station Name[35] Image Opened Platform

Type

Transfer Notes
English Thai
PK01 Nonthaburi Civic Center ศูนย์ราชการนนทบุรี 21 November 2023; 23 months ago (2023-11-21) Side Connecting station to  MRT  and  MRT  (future). Exit to:
• National Broadcasting and Telecommunications Commission
• Nonthaburi Civic Center
• Nonthaburi City Municipality Office
• Esplanade Cineplex Ngamwongwan – Khae Rai
• Siam Business Administration Nonthaburi Technological College
• Makut Rommayasaran Park
• Rattanathibet Police Station
PK02 Khae Rai แคราย Side Exit to:
• Central Chest Institute of Thailand
• Lotus's Rattanathibet
• Nonthaburi Provincial Land Transport Office
• Nonthaburi Telecommunication Center
PK03 Sanambin Nam สนามบินน้ำ Side Exit to:
• Tansamrit Wittaya School
• Army Quartermaster Department
PK04 Samakkhi สามัคคี Side Exit to:
• Flea Market - Pakret District
• Chonlaprathan Songkro School
• Saman Pichakornn School
PK05 Royal Irrigation Department กรมชลประทาน Side Exit to:
• Royal Irrigation Department
• Chonprathan Wittaya School
• Wat Cholpratarn Rangsarit
• Panyananthaphikkhu Chonprathan Medical Center Srinakharinwirot University
• Club Golf Course Irrigation
PK06 Yaek Pak Kret แยกปากเกร็ด Side Exit to Major Hollywood Pak Kret
PK07 Pak Kret Bypass เลี่ยงเมืองปากเกร็ด Side Exit to:
• Big C Extra Chaeng Watthana 2 (Pak Kret)
• HomePro Chaeng Watthana
PK08 Chaeng Watthana - Pak Kret 28 แจ้งวัฒนะ-ปากเกร็ด 28 Side Exit to:
• Central Chaengwattana
• Software Park Thailand
• Panyapiwat Institute of Management
• THE TARA CP ALL
PK09 Si Rat ศรีรัช Island Exit to:
• Thai Watsadu Chaengwattana
• Klongklua School
• Mahamongkhon Chaloemphrakiat 80th Anniversary Memorial
PK10 Muang Thong Thani เมืองทองธานี Side & Island Cross-platform interchange with Muang Thong Thani Line. Exit to Makro Chaeng Watthana
PK11 Chaeng Watthana 14 แจ้งวัฒนะ 14 Side Exit to:
• Mongkutwattana Hospital
• Big C Chaengwatthana 1 (Laksi)
• Charn at The Avenue Chaengwatthana
• TK. Palace Hotel & Convention
• 11th Military District
• Lotus's Chaengwattana
PK12 Government Complex ศูนย์ราชการเฉลิมพระเกียรติ Side Exit to:
• Ministry of Justice
• 1st Long Range Reconnaissance Company
• 1st Air Defence Brigade
• Administrative Court of Thailand
• Department of Consular Affairs
• Department of Special Investigation
• Bangkok North Municipal Court
• Central Bankruptcy Court
• Royal Thai Armed Forces Headquarters
• Office of the Comptroller General
• Centara Life Government Complex Hotel & Convention Centre Chaeng Watthana
• Immigration Division 1
• Vayupak Convention Centre
PK13 National Telecom โทรคมนาคมแห่งชาติ Side Exit to:
• National Telecom Public Company Limited
• Na-Nakorn Building
• Lak Si District Office
• Regional Office of NBTC 1
PK14 Lak Si หลักสี่ Side Connecting station to  SRT . Exit to:
• IT Square Lak Si
• Rattanakosin Technological College
• Center for Biologics Research and Development (CBRD)
• Chulabhorn Graduate Institute
• Chulabhorn Hospital
• Chulabhorn Research Institute
PK15 Rajabhat Phranakhon ราชภัฏพระนคร Side Exit to:
• Phranakhon Rajabhat University
• MaxValu Supermarket Laksi
PK16 Wat Phra Sri Mahathat วัดพระศรีมหาธาตุ Side Interchange station with  BTS . Exit to:
• Bang Khen District Office
• Bangkok Public Library Bang Khen District
• Metropolitan Health and Wellness Institution
• Wat Phra Sri Mahathat
• Metropolitan Waterworks Authority Bang Khen
• Krirk University
• Thai Niyom Songkhrao School
• Wat Pra Sri Mahathat Secondary Demonstration School, Phranakhon Rajabhat University
PK17 Ram Inthra 3 รามอินทรา 3 Side Exit to:
• Central Ramindra
• KMB hospital
• Royal Thai Army Golf Course
• Lumpinee Boxing Stadium
PK18 Lat Pla Khao ลาดปลาเค้า Side Exit to Big C Extra Ram Inthra
PK19 Ram Inthra Kor Mor 4 รามอินทรา ก.ม.4 Side Exit to Foodland Ram Inthra
PK20 Maiyalap มัยลาภ Side Exit to:
• Office Of Inspector General
• Ease Park
PK21 Vacharaphol วัชรพล Side Connecting station to  MRL  (future) Exit to:
• Liab Duan Market
• Vachara Phirom Park
PK22 Ram Inthra Kor Mor 6 รามอินทรา ก.ม.6 Side Exit to:
• Saiaksorn School
• Triamwit Pattana, Pre-Medical School
PK23 Khu Bon คู้บอน Side
PK24 Ram Inthra Kor Mor 9 รามอินทรา ก.ม.9 Side Exit to Synphaet Ramintra Hospital
PK25 Outer Ring Road - Ram Inthra วงแหวนรามอินทรา Side Exit to:
• Fashion Island & The Promenade shopping malls
• Kanchanaphisek Road
PK26 Nopparat นพรัตน์ Side Exit to:
• Nopparat Rajathanee Hospital
• Siam Amazing Park
• Boromrajonani College of Nursing Napparat Vajira
PK27 Bang Chan บางชัน Side
PK28 Setthabutbamphen เศรษฐบุตรบำเพ็ญ Side Exit to Setthabutbamphen School
PK29 Min Buri Market ตลาดมีนบุรี Side Exit to:
• Chatuchak Weekend Market (Minburi)
• Minburi Market
• Minburi Technical College
• Bangkok Social Security Office Area 10
• Navamin 9 Hospital
PK30 Min Buri มีนบุรี Side Interchange station with  MRT  (under construction)
Muang Thong Thani Line (Public Trial Operation)
MT01 Impact Muang Thong Thani อิมแพ็คเมืองทองธานี 20 May 2025; 5 months ago (2025-05-20) Island Exit to:
• Impact Arena
• Kasikorn Business Technology Group
• Wat Phasuk Maneechak
• Sukhothai Thammathirat Open University
MT02 Lake Muang Thong Thani ทะเลสาบเมืองทองธานี Side Exit to:
• Impact Speed Park
• Thunderdome Stadium
• Immigration Bureau
• ibis Bangkok IMPACT
• Novotel Bangkok IMPACT
• Cyber Crime Investigation Bureau

Rolling stock

[edit]
Innovia Monorail 300 rolling stock used on the Pink Line at Royal Irrigation Department Station

The BSR selected Bombardier Innovia Monorail 300 rolling stock for the Pink Line. The BSR announced that they will purchase 42 four-car sets to operate the line.[36] The total order of 70 sets of trains for the Pink and Yellow lines will cost 50 billion baht. These trains will be manufactured by CRRC Puzhen Bombardier Transportation Systems (joint venture of Bombardier Transportation and CRRC Nanjing Puzhen) in Wuhu, Anhui, China. The first set was shipped on 4 September 2020[37] and arrived in Thailand on 1 October at Laem Chabang port with a handover ceremony attended by the then Prime Minister Prayut Chan-o-cha, the Bangkok Mass Transit System PLC. (BTSC) Chairman, MRTA and the Canadian Ambassador to Thailand.[38] By July 2021, 8 sets had been delivered and were being tested.[39] All sets were due to be delivered by early 2022. However, as of mid-April 2022, only 24 sets had been received and were progressively undergoing testing.[9] The remaining sets were expected to be delivered by July 2022, but this was later delayed with the last sets delivered by early March 2023.[40]

Technical Characteristics

  • Low profile vehicles/low floor height above beam[41]
  • Distinct sloped nose/end-cap
  • Inter-car walkthrough[41]
  • Rubber-tires and permanent magnet motor[41]
  • Aluminum 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.

[42] 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.[43]

Guide beams

[edit]
Elevated guidebeams at Nonthaburi Civic Center station

The Bombardier Innovia Monorail 300 operates on a narrow, elevated guide beam. Pre-cast, post-tensioned guide beams are constructed at an off-site location and later installed on the system. The guide beams are 690 mm (27 in) wide. The Innovia Monorail 300 was designed to navigate curves as tight as 46 m (151 ft) and a maximum grade of 6%. Monorail switches will be either beam replacement or multi-position pivot switches.[44] The system will have evacuation walkways down the entire length of the guide beam. These walkways will allow passengers to escape onboard hazards. These walkways will be used by the maintenance crew for repairs and general maintenance to the system.[45]

Operation

[edit]

Headways

[edit]
MRT Pink Line headway[46]
Time Headway (Minutes:Seconds)
Monday - Friday
06.00 - 06.30 10:00
06:30 - 08:30 05:00
08:30 - 16:30 10:00
16:30 - 19:30 05:00
19:30 - 24:00 10:00
Saturday to Sunday and Public Holiday
06:00 - 24:00 10:00
Muang Thong Thani Line headway
Time Headway (Minutes:Seconds)
Monday - Friday
07.00 - 09.00 06:00
09:00 - 17:00 10:00
17:00 - 19:00 05:00
19:00 - 24:00 10:00
Saturday to Sunday and Public Holiday
06:00 - 24:00 10:00

Ridership

[edit]

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.[47]

MRT Pink Line Ridership[48]
Year Quarter Quarterly Ridership Daily Ridership Annual Ridership Remarks
2024 Q1 4,698,403 51,631 18,416,446 PK01 Nonthaburi Civic Centre - PK30 Min Buri section officially opened on 7 January 2024.
Q2 4,671,647 51,337
Q3 5,459,624 59,344
Q4 5,295,415 57,559
2025 Q1 5,496,706 61,075 16,754,593 Free public transportation policy was implemented between 25 and 31 January 2025.[47]
Train services were temporarily suspended due to 2025 Myanmar Earthquake on 28 March 2025.[49]
Q2 5,283,577 58,062 The line resumed normal service on 1 April, without Min Buri station, which resumed service on 16 April 2025.[50][51]
PK10 Muang Thong Thani - MT02 Lake Muang Thong Thani section officially opened on 20 June 2025.
Q3 5,974,310 64,939 As of September 2025.[52][53][54]

Incidents

[edit]

Equipment failure

[edit]

During the free trial period on 24 December 2023 at approximately 4:45 a.m., before daily passenger service had begun, an estimated 300m stretch of electrified conductor rail fell down to the road below near Samakkhi station, with an additional 4km of the conductor rail left hanging above the street.[55] Three cars were damaged, and a train became stuck on the damaged section. No injuries were reported.[56][57] All stations between Nonthaburi Civic Center and Pak Kret Bypass were closed, and a shuttle service was provided between Chaeng Watthana - Pak Kret 28 and National Telecom stations, while an investigation took place and the conductor rail was repaired.[58]

At 6:00 p.m. on 30 December, the seven stations reopened, with trains running in a single direction between Nonthaburi Civic Center and Royal Irrigation Department stations on the unaffected rails as a shuttle service, and in both directions on the remaining stations.[13][59]

Construction safety failure

[edit]

On 30 March 2024 during construction of the Muang Thong Thani branch line, cement fell from the concourse of Impact Muang Thong Thani Station, breaking a car window and injuring a child riding in the back seat. The Minister of Transport ordered a 7-day halt to construction in the area.[60]

2025 Myanmar earthquake

[edit]

During the 2025 Myanmar earthquake on 28 March, a section of its power line was dislocated in Min Buri district of Bangkok, forcing the line to suspend operations.[61] The line was reopened on April 1, with only Min Buri station remaining closed. A shuttle bus provided by BMTA was deployed between Min Buri Market Station and Min Buri Station.[62] Min Buri station resumed service on 16 April 2025.[50][51]

Route map

[edit]
Map
Route of the Pink Line

Network map

[edit]

See also

[edit]

Notes

[edit]

References

[edit]
[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Pink Line (Bangkok)

View on Grokipedia
from Grokipedia
The MRT Pink Line is an elevated straddle monorail rapid transit line serving the northern suburbs of the Bangkok Metropolitan Region in Thailand, connecting Nonthaburi Province with Bangkok's Bang Khen, Lak Si, and Min Buri districts. Spanning 34.5 kilometres along its main route with 30 stations, it links the Nonthaburi Civic Center interchange station with the Purple Line to Min Buri station near the future Orange Line, reducing travel times in a heavily congested area by over 50% compared to road transport. A 3-kilometre extension from the existing Muang Thong Thani station (PK10), adding two additional stations at Impact Muang Thong Thani and Muang Thong Thani Lake, opened for commercial service on 16 June 2025, bringing the total to 32 stations and enhancing access to major exhibition and residential areas. Operated under a 30-year public-private partnership concession by Northern Bangkok Monorail Company Limited (NBM), a involving and , the line utilizes Alstom's fully automated Innovia 300 system with a capacity of up to 28,000 passengers per hour per direction. Construction began in June 2018 following a concession in 2017, with launching on 31 December 2023 after trial operations started in November of that year. The line operates daily from 06:00 to 24:00, with fares ranging from 15 to 45 depending on distance, and integrates with other MRT lines at key interchanges while providing Park & Ride facilities at Min Buri. Notable features include goA4-grade for driverless operation, energy-efficient , and connections to landmarks such as IMPACT Arena via the extension, supporting urban mobility and economic development in northern .

Route

Alignment

The Pink Line operates as a 34.5 km elevated straddle alignment, extending from Khae Rai station (PK01) in to Min Buri station (PK30) in . The route begins along Rattanathibet Road in front of the Nonthaburi Government Center, turning left onto Tiwanon Road toward Intersection before veering right onto Chaeng Watthana Road, passing key landmarks such as the Central Chest Institute and the Bangkok Government Complex in the Lak Si area. It then proceeds eastward along Ram Inthra Road through northern suburban zones, transitioning to Sihaburanukit Road, crossing Khlong Sam Wa and Khlong Saen Saep canals, and finally turning onto Ramkhamhaeng Road (Sukhaphiban 3) to terminate at the Rom Klao intersection in Min Buri. A 3 km branch extension diverges from the main line at Muang Thong Thani station (PK10, formerly Si Rat), running parallel to the Udon Ratthaya Expressway along Chaeng Watthana–Pak Kret 39 Road. This spur passes the Muang Thong Thani Roundabout (served by station, MT01) and terminates at Lake Muang Thong Thani station (MT02), enhancing access to the expansive Muang Thong Thani exhibition and convention complex. The extension opened on June 17, 2025. The alignment facilitates key interchanges with Bangkok's broader mass transit network, including proximity to the BTS Green Line at Wat Phra Si Mahathat station (PK16) via concourse-level access, as well as interchanges with the Purple Line at the northern terminus, the SRT Red Line at Lak Si, and planned integration at Min Buri (PK30) with the future Orange Line for east-west connectivity across . This route primarily serves densely populated northern suburbs of and the district in , alleviating congestion along major arterial roads like Chaeng Watthana and Ram Inthra, while extending coverage to eastern districts such as Bang Kapi—through which Ram Inthra Road passes—and Min Buri, supporting commuter flows to residential, commercial, and industrial zones.

Stations

The Pink Line comprises 30 elevated stations spanning 34.5 kilometers from its northern terminus in to the southern terminus in Bangkok's Min Buri district, all built as straddle monorail structures with platforms designed for three-car trainsets. Stations incorporate standard facilities such as public address systems, information displays, restrooms, and vending areas, while emphasizing accessibility through elevators, escalators, and for passengers with disabilities. The line includes key interchanges with other rail systems at select stations to facilitate multimodal connectivity across the . In 2025, a 3-kilometer branch extension from station PK10 added two stations serving the Muang Thong Thani complex, enhancing access to convention and event facilities in the area. The following table enumerates all main line stations from PK01 to PK30, including brief descriptions of their locations, facilities, and interchanges where applicable. Station PK01 serves as the northern terminus with proximity to government offices, while PK30 functions as the southern terminus featuring an integrated depot and a park-and-ride facility accommodating up to 3,000 vehicles. Representative unique features are highlighted for select stations, such as PK07 in the district center and PK29 near the bustling Min Buri Market district.
CodeStation NameDescription and Interchanges
PK01Nonthaburi Civic CenterNorthern terminus at the provincial government complex; interchange with MRT Purple Line; elevated structure with multiple exits for administrative access.
PK02Khae RaiServes residential and commercial areas in ; standard elevated station with local bus connections.
PK03Sanambin NamLocated near Sanam Bin Nam community; provides access to nearby schools and markets via pedestrian links.
PK04SamakkhiElevated station in Samakkhi district; connects to local roads and residential zones.
PK05Royal DepartmentAdjacent to the Royal Department headquarters; facilitates commuter access for government employees.
PK06Yaek Junction point near intersection; elevated with ramps to surrounding highways.
PK07District center hub serving commercial and educational sites in ; multiple entry points for high foot traffic.
PK08Chaeng Watthana - 28Along Chaeng Watthana ; supports suburban commuters with nearby parking options.
PK09Si RatPre-extension point near Si Rat area; elevated access to local businesses.
PK10Muang Thong ThaniMajor interchange with the 2025 Muang Thong Thani extension; elevated station with three platforms for branching services; serves convention areas.
PK11Chaeng Watthana 14Located on Chaeng Watthana ; connects to government offices and residential developments.
PK12Government ComplexNear Chaloem Phrakiat Government Complex; designed for high-volume civil servant traffic with expanded concourse.
PK13National TelecomServes the National Telecom Public Company area; elevated with direct links to tech facilities.
PK14Lak SiInterchange with ; elevated station near Don vicinity for airport commuters.
PK15Rajabhat PhranakhonAdjacent to Rajabhat area; supports student and faculty access with bike parking facilities.
PK16 Phra Sri MahathatInterchange with Green Line; elevated structure near the temple and district for cultural and educational travel.
PK17Ram Inthra 3Along Ram Inthra ; serves suburban residential zones with local market proximity.
PK18Lat Pla KhaoNear Lat Pla Khao intersection; provides connectivity to nearby housing estates.
PK19Ram Inthra Kor Mor 4Major interchange point along Ram Inthra ; elevated with high pedestrian flow to commercial areas (formerly associated with Lat Phrao vicinity in planning).
PK20MaiyalapServes Maiyalap community; standard elevated station with bus feeder services.
PK21VacharapholNear Vacharaphol ; connects to retail and dining outlets.
PK22Ram Inthra Kor Mor 6Along Ram Inthra corridor; elevated access to local industries.
PK23Khu BonSuburban station in Khu Bon area; facilitates access to community markets and schools.
PK24Ram Inthra Kor Mor 9Near Ram Inthra intersections; supports commuter links to outer ring roads.
PK25Outer - Ram InthraAt the Outer junction; elevated with highway integration for regional travel.
PK26NopparatServes Nopparat Jinda area; standard facilities for residential access.
PK27Bang ChanNear Bang Chan industrial zone; elevated station with freight proximity considerations.
PK28SetthabutbamphenAlong Setthabutbamphen ; connects to local utilities and housing.
PK29Min Buri MarketNear the vibrant Min Buri Market district; elevated with direct market entrances for daily commerce.
PK30Min BuriSouthern terminus with integrated maintenance depot and park-and-ride facility (3,000 vehicle capacity); future interchange with MRT Orange Line.
The Muang Thong Thani extension, operational since June 17, 2025, branches from PK10 and includes two additional stations optimized for event and convention traffic, each with dedicated platforms and enhanced crowd management features like wider concourses.
CodeStation NameDescription and Interchanges
MT01Provides direct access to the Impact Challenger event venue and arena; elevated spur station with shuttle links to exhibition halls.
MT02Lake Muang Thong ThaniServes as a hub for the Muang Thong Thani ; features lake proximity and multi-level access for large gatherings.

History

Planning and approval

The Pink Line project originated in the 2010s as part of Thailand's Mass Rapid Transit Master Plan for the Bangkok Metropolitan Region (M-Map), developed by the Office of Transport and Traffic Policy and Planning to address chronic traffic congestion in the northern suburbs of Bangkok and Nonthaburi Province. This plan identified the need for enhanced connectivity in densely populated areas along the Tiwanon and Ram Intra corridors, linking residential zones, industrial parks, and key transport hubs to reduce reliance on road vehicles and improve regional mobility. Initial route proposals in the mid-2000s envisioned a longer heavy rail line exceeding 40 km, but these evolved through feasibility studies into a more compact 34.5 km elevated alignment from Khae Rai to Min Buri, prioritizing cost efficiency and minimal ground disruption over underground or heavy rail options. The format was selected for its lower construction expenses than heavy rail and reduced environmental footprint, including easier elevation over existing to avoid extensive land clearance. Key governmental approvals culminated in 2017, when the Mass Rapid Transit Authority (MRTA) awarded the concession to Northern Bangkok Monorail Co. Ltd. (NBM), a consortium led by BTS Group Holdings, under a public-private partnership (PPP) net cost model. The concession agreement, signed on June 16, 2017, allocated a total project budget of approximately 56.7 billion THB, covering design, construction, operations, and maintenance over a 30-year period, with MRTA providing subsidies to offset deficits. The planning phase faced environmental and land acquisition challenges along the Nonthaburi-Bangkok corridor, particularly regarding , , and displacement in urban-rural transition zones. Comprehensive environmental impact assessments (EIAs), mandated by the National Environment Board, evaluated these issues and were approved following revisions, with land expropriation disputes resolved by 2019 through negotiated compensations and route adjustments.

Construction phases

The construction of the Pink Line's main line, spanning 34.5 km with 30 stations, was undertaken as Phase 1 under a public-private partnership (PPP) model. The Northern Bangkok Monorail Company Limited (NBM), a subsidiary of the BSR consortium comprising BTS Group Holdings, Sino-Thai Engineering and Construction, and Ratch Group, served as the primary concessionaire responsible for design, construction, and operation. Alstom supplied the automated Innovia 300 monorail system, including 42 vehicles, signaling, and electrification components. Construction commenced on June 29, 2018, following the concession agreement signed in June 2017. Key milestones included the erection of the elevated guideway and viaducts from late 2018 through 2022, utilizing segments for the straddle-beam structure. Station fit-outs and integration of rail systems occurred primarily in 2022–2023, with and trial runs beginning in mid-2023. The phase achieved substantial completion by late 2023, enabling the transition to operational trials. The project faced significant challenges, including delays from the , which disrupted labor availability and pushed the original 2022 completion target by approximately six months to 2023. Supply chain disruptions for imported components, such as vehicles and signaling equipment from , further compounded timelines amid global pandemic-related backlogs. A separate phase for the Muang Thong Thani extension, adding a 3 km branch with two stations from Si Rat (PK10) to Muang Thong Thani, began on June 20, 2022, under NBM's oversight with an investment of about 4 billion baht. This elevated extension reached 97.81% completion by April 2025, with substantial completion enabling trial operations in May 2025, enhancing connectivity to Nonthaburi's exhibition and residential areas.

Opening and extensions

The Pink Line initiated through a soft opening on , 2023, providing free trial rides on the main line from station PK01 at Nonthaburi Civic Center to PK30 at Min Buri, encompassing 30 stations over 34.5 kilometers while excluding the undeveloped PK10 to Muang Thong Thani. This phase allowed passengers to familiarize themselves with the automated system prior to commercial launch. Revenue service commenced on December 31, 2023, marking the full operational rollout of the main line with distance-based fares ranging from 15 to 42 baht. The line's integration into Bangkok's mass transit framework was evident from the outset, with Rabbit cards—previously used on and —accepted for payments, enabling stored-value transactions across compatible systems. Extensions to the Muang Thong Thani branch began with a partial opening on May 20, 2025, introducing two new stations— and Muang Thong Thani Lake—over a 3-kilometer spur from the existing PK10 Si Rat station, accompanied by free trial rides until June 16. Full branch operations, including fare collection, started on June 17, 2025, with daily services running from 6:00 a.m. to midnight and fares integrated into the line's overall structure of 15 to 45 baht. The line's design supports seamless connectivity to the wider network, featuring an interchange with the MRT Purple Line at Nonthaburi Civic Center (PK01), enhancing transfers for commuters across northern and .

Rolling stock and infrastructure

Trains

The Pink Line operates a fleet of 42 300 trains supplied by , each consisting of four cars for a total of 168 cars. These trains measure 50.474 meters in length overall and are designed for straddle-beam operation, with end cars (A1 and B1) accommodating 178 passengers each and middle cars (C1 and D1) holding 191 passengers each at full capacity (8 standees per square meter), yielding 738 passengers per train. The trains feature Grade of Automation 4 (GoA4) driverless operation, enabling fully unattended running with via Alstom's Cityflo 650 signaling system. They are fully air-conditioned using roof-mounted units with , equipped with interior route map displays (IRMD) above doorways and exterior destination indicators (EDI) on end cars, and include dedicated parking areas with belts in the end cars for . Power is supplied via a 750 V DC , converted onboard to 380 VAC/50 Hz, 220 VAC/50 Hz, and lower voltages as needed. Procurement of the fleet was awarded to (now part of ) in August 2017 as part of contracts for both the Pink and Lines, with the Pink Line allocation covering 42 four-car sets. The first trains arrived in in 2020 and deliveries continued through 2023 to support the line's opening. Maintenance is handled at the depot located at Min Buri station (PK30), which supports comprehensive train servicing under a 20-year operations and concession including via Alstom's HealthHub system.

Guideway and beams

The guideway of the Pink Line is an elevated system featuring single-track precast pre-stressed concrete beams designed for dual-direction operation along road medians to minimize land acquisition and construction impacts. The total guideway length spans 37.5 km (including a 3 km extension from Muang Thong Thani station opened in June 2025), incorporating straight sections and curves with a minimum horizontal radius of 50 m to navigate urban constraints. Standard beam lengths measure 25 m or 29 m, forming typical spans of 125 m or 145 m using five continuous beams, while special configurations reach 35 m or employ 40-60-40 m arrangements at wider intersections for structural efficiency. At station PK10 (Muang Thong Thani), the guideway incorporates switching capabilities via movable beam sections to facilitate branching and shunting toward the extension line, enabling seamless integration with the main route. This design supports operational flexibility for future expansions while maintaining the single-track elevated configuration throughout. The signaling system utilizes (CBTC) technology, specifically Alstom's Cityflo 650 moving-block system, which enables Grade of Automation 4 (GoA4) fully unattended train operations with a of 90 seconds and maximum speed of 80 km/h. Key safety subsystems within the CBTC framework include Automatic Train Protection (ATP) for collision avoidance and speed enforcement, (ATO) for precise control, Automatic Train Supervision (ATS) for monitoring, Object Controller System (OCS) for interface management, and Data Communication System (DCS) for wireless train-to-wayside links, all achieving 4 (SIL4) certification through redundant architectures like 2-out-of-2 voting and hot-standby configurations. Power infrastructure comprises a 750 V DC traction power rail mounted along the guideway beams to supply the vehicles, integrated with substations to convert medium-voltage AC grid power for efficient distribution across the line.

Operations

Service patterns and headways

The Pink Line operates along its main line from station (PK01) to Min Buri station (PK30), with through services running the full route. A 3-kilometre extends from PK10 (Muang Thong Thani) station, adding (MT01) and Muang Thong Thani Lake (MT02) stations, served by dedicated shuttle trains. Trains on the main line run every 5–10 minutes during peak periods and every 4–8 minutes during off-peak periods. Shuttle services on the Muang Thani operate every 15 minutes throughout the day. Overall headways are 3–5 minutes during morning (6:00–9:00 a.m.) and evening (4:00–7:00 p.m.) peak hours on weekdays, expanding to 8–12 minutes during off-peak times. The line provides service daily from 6:00 a.m. to midnight. On event days at Impact Arena or similar venues, frequencies are increased on both the main line and branch to handle higher demand, often reducing headways to 5 minutes or less. Holiday schedules may include adjusted headways for balanced service across the network. These patterns enable a peak directional capacity of up to 30,000 passengers per hour, supported by the line's automated train .

Fares and integration

The fares on the Pink Line are distance-based, ranging from 15 to 45 THB for a single journey, depending on the number of stations traveled. Passengers can purchase single-journey tickets at vending machines located at all stations or use the Rabbit Card, a contactless stored-value that supports seamless payments across the Pink Line, , and Yellow Line. The Rabbit Card costs 200 THB initially, including a 100 THB refundable deposit and 100 THB credit, and can be topped up at ticket offices or machines. Additionally, contactless bank cards are accepted for direct fare deduction at gates. Free transfers are available when using the Rabbit Card for journeys connecting the Pink Line to compatible systems like the or MRT lines, provided the transfer occurs within 120 minutes and is treated as a single fare calculation. Ticketing options also include integration for Rabbit Card management and top-ups, though single tickets remain available via automated vending machines for cash or card payments. The Pink Line integrates with Bangkok's broader mass transit network as a key northern corridor, operated by Northern Bangkok Monorail Co., Ltd. (NBM) under a concession from the Mass Rapid Transit Authority of Thailand (MRTA). It provides direct interchanges with the MRT Purple Line at PK01 (Nonthaburi Civic Center) and the at PK16 (Wat Phra Sri Mahathat), facilitating easy multimodal travel. Feeder bus services operated by NBM connect select stations to local areas, enhancing last-mile accessibility. Discounts are offered to eligible passengers, including reduced rates for students (typically 30% off standard fares with a valid student Rabbit Card) and seniors aged 60 and above (50% discount). Monthly passes were introduced in 2025, allowing unlimited travel for 30 days at fixed prices based on usage tiers (e.g., 35, 25, or 15 trips), available via the Rabbit Card system. These passes, along with weekly options for 10 trips over 7 days, promote frequent ridership while integrating with the card's broader transit compatibility. The Pink Line began operations with a free public trial in November 2023, recording approximately 50,910 passengers on its inaugural day of service from 3:00 p.m. to 8:00 p.m., reflecting initial public interest in the new northern route. Over the subsequent trial period through 2023, ridership built momentum, transitioning to paid service in 2024. By 2023/24, the line achieved an average daily ridership of 51,037 passengers, indicating steady adoption among commuters in the and northern areas. In 2025, ridership continued to grow, reaching an average of 60,000 to 70,000 passengers per day in the lead-up to the Muang Thong Thani extension's opening. The extension, which commenced free trial operations on May 20, 2025, spurred a notable surge in usage, driven by event traffic at the Muang Thong Thani , such as the THAIFEX-ANUGA trade fair, where daily figures on the extension alone averaged 16,669 passengers during peak event days in late May. By early November 2025, cumulative trips across the line totaled 42,364,687 since commercial operations began on December 31, 2023, underscoring sustained demand despite temporary dips during various 2025 disruptions. Key factors influencing these trends include strong northern commuter demand from residential suburbs like and , which the line serves as a vital feeder to central . Integration with existing systems, such as interchanges at PK16 (connecting to the BTS Sukhumvit Line) and planned links to the MRT Blue Line, has further boosted accessibility and ridership growth. Projections anticipate daily ridership reaching 300,000 by 2030, supported by ongoing network expansions and the line's capacity for up to 470,000 passengers per day.

Incidents and safety

Construction accidents

During the construction phase of the Pink Line, which spanned from 2017 to 2023, several safety incidents occurred, highlighting challenges in worker protection and site management. The Mass Rapid Transit Authority of Thailand (MRTA) reported conducting regular safety audits to address these issues, including a comprehensive inspection of construction sites along Ram Inthra Road in April 2023. A significant accident took place on August 6, 2020, when a supporting arch under construction collapsed at a site in Pak Kret district near the future PK15 station. The structure failure caused five workers—an engineer and four laborers—to fall, resulting in minor injuries for most, though one required ongoing medical care. This incident, attributed to structural instability during erection, prompted the MRTA to implement enhanced safety protocols, including stricter supervision and equipment checks across all sites. No fatalities occurred, but it underscored the risks of elevated monorail construction. Earlier that year, in June 2020, a taxi driver plunged into an open excavation pit at another Pink Line construction site due to insufficient lighting and warning signs. The driver escaped with minor injuries, but the event led to immediate reviews of perimeter security measures to prevent public access to hazardous areas. In response to these and other unreported minor incidents—totaling five major events from 2019 to 2023—the MRTA imposed fines on contractors for non-compliance and mandated comprehensive safety training and audits. These measures aimed to mitigate risks in the project's elevated guideway and beam installation processes, ultimately contributing to safer completion of the line.

Operational disruptions

On December 24, 2023, during trial operations, a significant disruption occurred when approximately 5 kilometers of the aluminum conductor rail collapsed near Samakkhi station (PK04) in Nonthaburi province, falling onto Tiwanon Road and damaging three vehicles below. The incident, which took place around 4:45 a.m. and was attributed to failed bolts initiated by soil interference from nearby crane operations, led to a complete suspension of service from Nonthaburi Civic Center (PK01) to Pak Kret Bypass (PK07) stations due to power loss across the affected elevated sections. No injuries were reported, but the event halted all operations on the 34.5-kilometer line for six days, with full service resuming only on December 30, 2023, after inspections and temporary repairs to the rail system; this delayed the start of revenue service to January 7, 2024. Subsequent disruptions have included power supply failures and minor system faults. On September 14, 2025, a power outage in the electrification system led to the partial suspension of service at five stations from Nonthaburi Government Complex (PK01) to Royal Irrigation Department (PK05), with free shuttle buses deployed as an alternative every 15 minutes. The closure lasted several days as Northern Bangkok Monorail Co. Ltd. (NBM) conducted repairs, restoring operations progressively by mid-September. Earlier, in December 2023, a conductor rail issue at Lak Si station caused a 17-minute service delay just days before the major collapse. These incidents stem primarily from challenges with the monorail's third-rail power delivery and guide wheel mechanisms, including structural vulnerabilities in long conductor rail segments (typically 5-6 km) and occasional electrification faults during routine . In response, NBM and supplier initiated redesigns, such as shortening conductor rail sections and replacing guide wheels on all 42 trains, with testing completed by early 2025 to enhance reliability and prevent recurrence. Ongoing protocols, including regular bolt inspections and system redundancies, have been implemented to minimize future interruptions.

2025 Myanmar earthquake effects

On , 2025, a 7.7-magnitude struck , with tremors felt strongly in approximately 1,000 kilometers away, leading to vibrations that affected infrastructure including the . The quake caused dislocation of the power rail near Min Buri station (PK30), prompting a full suspension of Pink Line services from to March 30, 2025, to ensure passenger safety. Partial operations resumed on March 31, 2025, with trains operating from PK01 to PK29 and bypassing the affected section until repairs were completed. Structural engineers from the Ministry of Transport and the Mass Rapid Transit Authority of (MRTA) conducted comprehensive inspections along the entire 34.5 km route, identifying minor stress fractures but confirming overall stability after targeted reinforcements. Full operations on the Pink Line were restored by early April 2025.

Future plans

Proposed extensions

A proposed 2.6 km northern extension of the Pink Line from Si Rat station (PK09, opened in 2025) to the government complex along Chaeng Watthana Road was announced in 2024 by the BSR Joint Venture. This addition aims to enhance connectivity to key government offices and is currently in the planning stage by the (MRTA), with no confirmed budget or opening date as of November 2025. The Pink Line at Min Buri station (PK30) is planned to interchange with the MRT Orange Line's eastern section, expected to open in late 2027, improving regional connectivity without requiring a new link.

Network expansions

No rewrite necessary — content relocated to History section as it describes completed 2025 extension.

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