MRT Blue Line

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Blue Line
Chaloem Ratchamongkhon Line
MRT (Bangkok) logo.svg
Silom Station
Type Rapid transit
System MRT
Status Operational (18 stations)
Under Testing (Tao Poon)
Locale Bangkok, Thailand
Termini Hua Lamphong
Bang Sue
Tao Poon (since 2017)
Stations 19
Daily ridership 240,000
Ridership 80.6 million
Opened July 3, 2004
(Hua Lamphong - Bang Sue)
(Bang Sue - Tao Poon)
Owner Mass Rapid Transit Authority of Thailand
Operator(s) Bangkok Expressway
and Metro Public Company Limited (BEM)
Character Underground (18 stations)
Elevated (only Tao Poon Station)
Depot(s) Huai Khwang Depot
Rolling stock 19 three-car trains Siemens Modular Metro
Line length 21 km (13 mi)
Track gauge 1,435 mm (4 ft 8 12 in) standard gauge
Electrification 750V DC Third rail
Operating speed 80 mph (130 km/h)
Route map
 MRT  Blue Line: Left arrow Hua Lamphong – Bang Khae Right arrow
Tha Phra
Charan Sanit Wong 13
Yaek Fai Chai
Bang Khun Non
 MRT  Orange Line: Left arrow Min Buri – Taling Chan Right arrow
Bang Yi Khan
Bang Phlat
Bang O
Chao Phraya River
Bang Pho
Tao Poon
 MRT  Purple Line: Left arrow Kiak Kai – Bang Yai Right arrow
(Up arrow Open on Dec 2015)
Bang Sue(Grand Central Station)
 SRT Light Red Line: Left arrow Hua Mak – Taling Chan Right arrow
 SRT  Dark Red Line: Left arrow Hua Lamphong – Rangsit Right arrow
 ARL ARL: Left arrow Suvarnabhumi – Don Muang Right arrow
Kamphaeng Phet
Chatuchak Park
 BTS Sukhumvit Line: Mo Chit
Left arrow Siam – Saphan mai Right arrow
Phahon Yothin
Lat Phrao
Huai Khwang
 MRT  Orange Line: Left arrow Taling Chan – Min Buri Right arrow
Thailand Cultural Centre
Rama 9 Depot
Phra Ram 9
Left arrow Don Muang – Suvarnabhumi Right arrow
 ARL  ARL: Makkasan
 SRT  Light Red Line: Left arrow Bang Sue – Hua Mak Right arrow
 BTS  Sukhumvit Line: Asoke
Left arrow Siam – Bearing Right arrow
Queen Sirikit Center
Khlong Toei
Si Lom
 BTS  Silom Line: Saladaeng
Left arrow Siam – Bang Wa Right arrow
Sam Yan
Hua Lamphong
 SRT  Dark Red Line: Hua Lamphong
Left arrow Bang Sue – Maha Chai Right arrow
(Down arrow Under construction, open 2016)
Wat Mangkon
Wang Burapha
 MRT  Purple Line: Left arrow Ratburana – Tao Pun Right arrow
Sanam Chai
Chao Phraya River
Tha Phra
 MRT  Blue Line: Left arrow Hua Lamphong
Bang Phai
Siam Right arrow
 BTS  Silom Line: Bang Wa
Bang Wa
Phetkasem 48
Phetkasem Depot
Phasi Charoen
Bang Khae
Lak Song

The MRT Chaloem Ratchamongkhon Line (Thai: รถไฟฟ้ามหานคร สายเฉลิมรัชมงคล) or MRT Blue Line (Thai: รถไฟฟ้ามหานคร สายสีน้ำเงิน) is the first of Bangkok's MRT system and the city's third rapid transit line, following Sukhumvit Line and Silom Line operated by BTSC. Opened on 3 July 2004, it runs eastward from Bang Sue Station in Chatuchak District along Kamphaeng Phet, Phahon Yothin and Lat Phrao roads, then turns south following Ratchadaphisek Road, then west following Rama IV Road to Hua Lamphong Station in Pathum Wan District.

A much delayed 27 km extension to the Blue line finally began construction in mid 2012 due for completion in April 2019, two years later than planned.[1]


For the first MRT line, officially known as Chaloem Ratchamongkhon or informally as the "Blue Line", most civil infrastructure were provided by the government sector, Mass Rapid Transit Authority of Thailand (MRTA), and handed over to their concessionaire under a 25-year concession agreement. Bangkok Metro Company Limited (BMCL) is the only private sector company that won a bid in MRTA's concession contract for the blue line. As MRTA's concessionaire, BMCL provides M&E equipment, including electrical trains, signalling systems, SCADA, communication, PSD, etc. for the underground metro project and fully operates the system. BMCL has subcontracted maintenance of the system for 10 years to Siemens, which was the M&E system supplier from the system's opening, and seven-year maintenance contracts to two local maintenance services for the north and south line.

The construction of the first Bangkok Metro line, officially known as Chaloem Ratchamongkhon (Thai สายเฉลิมรัชมงคล) – "Celebration of Royal Auspice" – or informally as the "Blue Line", began on 19 November 1996. The project suffered multiple delays not only because of the 1997 economic crisis, but also due to challenging civil engineering works of constructing massive underground structures deep in the water-logged soil upon which the city is built.

The Blue Line was opened for a limited public trial period of several weeks starting on 13 April 2004. On 3 July 2004 the line was officially opened at 19:19 local time by HM King Bhumibol and Queen Sirikit, who were accompanied by other members of the royal family. Within 30 minutes of its opening, sightseers filled the system to its maximum capacity, but after the initial rush ridership has settled down to around 180,000 riders daily — considerably lower than projections of over 400,000, despite fares being slashed in half from 12-38 baht to 10-15 baht per trip. Current ridership (2012) stands at 240,000 on weekdays.


Inside the train of MRT blue line, Siemens Modular Metro.

The 21-kilometre, 19-station Blue Line presently runs from Bang Sue to Hua Lamphong via Phra Ram 9 and has a carrying capacity of 40,000 people in each direction per hour. Similar to the Skytrain, the Metro uses trains supplied by Siemens that travel at up to 80 km/h. Passengers can conveniently connect to the Skytrain at Si Lom, Sukhumvit and Chatuchak Park stations. The metro has a large depot in Huai Khwang district, which is located between Phra Ram 9 and Thailand Cultural Centre stations.

Due to safety considerations, platform screen doors are installed. Uniformed security personnel and security cameras are present at each and every platform. Currently 19 three-car metro trains, of the Siemens Modular Metro type, are used. Each metro train consists of two motor cars and a centre trailer car.[2]


Station Name
Station Name
TAO Tao Poon เตาปูน  MRT  Bangkok Bang Sue
BAN Bang Sue บางซื่อ  SRT  (under construction)  SRT  (planned)  ARL  (proposed) inter-city rails Chatuchak
KAM Kamphaeng Phet กำแพงเพชร
CHA Chatuchak Park สวนจตุจักร  BTS 
PHA Phahon Yothin พหลโยธิน  BTS  (planned)
LAT Lat Phrao ลาดพร้าว  MRT  (planned)
RAT Ratchadaphisek รัชดาภิเษก Din Daeng/Huai Khwang
SUT Sutthisan สุทธิสาร
HUI Huai Khwang ห้วยขวาง
CUL Thailand Cultural Centre ศูนย์วัฒนธรรมแห่งประเทศไทย  MRT  (proposed)
RAM Phra Ram 9 พระราม 9 Grand Square Phra Ram 9 Monorail (proposed)
PET Phetchaburi เพชรบุรี  ARL   SRT  (proposed) inter-city rails Ratchathewi
SUK Sukhumvit สุขุมวิท  BTS  Watthana
SIR Queen Sirikit National Convention Centre ศูนย์การประชุมแห่งชาติสิริกิติ์ Khlong Toei
KHO Khlong Toei คลองเตย
LUM Lumphini ลุมพินี  BMA  (proposed) Sathon
SIL Si Lom สีลม  BTS  Bang Rak
SAM Sam Yan สามย่าน  BTS  (proposed) Pathum Wan
HUA Hua Lamphong หัวลำโพง  SRT  (proposed) inter-city rails
WAT Wat Mangkon Kamalawat (under construction) วัดมังกรกมลาวาส Samphanthawong
WAN Wang Burapha (under construction) วังบูรพา  MRT  (Tao Pun-Rat Burana Extension, proposed) Phra Nakhon
SAN Sanam Chai (under construction) สนามไชย
ITS Itsaraphap (under construction) อิสรภาพ Bangkok Yai
THP Tha Phra (under construction) ท่าพระ  MRT  (Bang Sue-Tha Phra Extension, under construction)

Major accident record[edit]

On 17 January 2005, just after 09:15, an empty train returning to the depot collided with a peak-hour train filled with passengers at the Thailand Cultural Centre station. 140 people were hurt, most of whom sustained only minor injuries, and the entire Metro network was shut down for two weeks.

After initial investigations, it was found that the empty train had run into problems shortly before the accident, grinding to a halt on a curve leading to the depot. The driver applied its brake and was waiting to be towed to the maintenance centre close to Thailand Cultural Centre station.

A rescue train was attempting to connect to the stalled train when the driver was told to release the brake while coupling had not yet been successful. It was then that the empty train began to roll backwards at a speed of ten metres per second, before smashing into the other train, which was carrying passengers. Therefore, it was believed that the incident was caused by negligence due to insufficient training of operation staff.[3] This accident also resulted in two damaged trains with heavily damaged areas limited to the two leading cars. The colliding speed was suspected to be about 60 km/h due to the appearance of damaged areas. However, one train, which was rebuilt from the repair of the minor-damaged cars, was already fitted for operation at the end of 2006 and the remaining one was still under heavy repair until mid of 2007; it was released into service in October, 2007. The cost resulting from the accident might be a much higher figure than BMCL quoted, and it was expected to be at least 400 million baht, which was totally insured by a local insurance company.

The Metro resumed full operation on 1 February 2005, and passenger numbers soon rose back to pre-crash levels, partly due to a temporary promotional fare scheme which allowed passengers to travel any distance on the MRT for only ten baht (~0.33 USD).

Current extension under construction[edit]

Under construction Bang Wa MRT Station in June 2016
Under construction viaduct in June 2016

The 27 km Blue Line extension will form a quasi circle line (loop). It consists of 19 stations (4 underground stations and 15 elevated stations). (The current terminus at Bang Sue is being extended 1.2 km to Tao Poon as part of the Purple Line project).

From Tao Poon the line will run elevated west along Pracha Rat Sai 2 rd, cross the Chao Praya river and then run south along the Ratchadapisek inner ring road (Charan Sanit Wong rd) terminating at Tha Phra. From the current Hualomphong terminus the line runs 5.4 km underground through Chinatown, under the Chao Praya river to Tha Phra station where it surfaces. It then runs west along Phetkasem road to Lak Song.

The project is divided into 5 contracts:

  • Contract 1: 2.8 km underground from Hua Lamphong to Sanam Chai

(2 stations, Bt11.65 Billion, contractor ITD).

  • Contract 2: 2.6 km underground Sanam chai-Tha Phra

(2 stations, for Bt10.82B, contractor CK)

  • Contract 3: 11 km elevated from Tao Poon along Charan Sunit Wong rd (Inner Ring rd) to Tha Phra

(8 stations, Bt11.40B, contractor SH-Unique Joint venture)

  • Contract 4: 10.5 km elevated from Tha Phra along Phetkasem rd to Lak Song

(7 stations, plus a park-and-ride venue and maintenance yard, Bt13.43B, contractor STEC)

  • Contract 5: rolling stock and systems, Bt5.17 Billion, contractor CK.

As of July 2014 civil works progress was 52% done.[4] By October, civil works were 63.75% done.

Future extension[edit]

For a few years there has been requests from residents to further extend the line from the future terminus at Lak Song further west to Phutthamonthon area and the MRTA has indicated a willingness to undertake this extension. In July 2014, the MRTA submitted a request for 84 million baht to complete a route survey for an 8 km extension from Lak Song to Phutthamonthon Sai 4.[5]

See also[edit]


External links[edit]