SRT Dark Red Line

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SRT Dark Red Line
Type Commuter rail
System Bangkok Suburban Commuter Train
Status Under Construction
Termini Thammasat
Maha Chai
Stations 36
Opened 2018 (est.) (Phase 1 Rangsit - Bang Sue)
2020 (est.) (Phase 2 Rangsit - Thammasat Uni)
2025 (est.) (Phase 3 Bang Sue - Hua Lamphong)
2029 (est.) (Phase 4 Hua Lamphong - Maha Chai)
Owner State Railway of Thailand
Line length 80.8 km (50.21 mi)
Track gauge 1,000 mm (3 ft 3 38 in) metre gauge
Electrification Overhead lines
Operating speed 160 km/h (99 mph)
Route map
(SRT North/Northeast Rail Line)
Future North Extension
32.6 Thammasat University
29.9 Chiang Rak
Bangkok University
26.2 Khlong Nueng
22.6 Rangsit
19.9 Lak Hok
13.8 Don Mueang
11.8 Kan Keha
9.9 Lak Si (Left arrow  MRT  Pink Line Right arrow)
7.1 Thung Song Hong
5.6 Bang Khen
4.1 Wat Samian Nari
2.6 Chatuchuk
Left arrow  SRT  To Talingchan
(and SRT South Rail Line)
0.0 Bang Sue Central
Left arrow  MRT  Blue Line Right arrow
2.7 Sam Sen
3.7 Ratchawithi
 ARL  To Suvarnabhumi Right arrow
 SRT  To Hua Mak Right arrow
(and SRT East Rail Line)
5.4 Yommarat
6.5 Yotse
7.5 Hua Lamphong
Left arrow  MRT  Blue Line Right arrow
Future South Extension
Chao Phraya River
Khlong San
Left arrow  MRT  Purple Line Right arrow
Wongwian Yai
Talat Phlu
Left arrow  BTS  Silom Line Right arrow
Chom Thong
Wat Sai
Wat Singh
Bang Bon
Rang Sakae
Rang Pho
Sam Yaek
Phrom Daen
Thung Si Thong
Bang Nam Chuet
Khok Khwai
Ban Khom
Maha Chai

The Dark Red Line is part of the planned SRT Red Line suburban railway system to serve the greater Bangkok Metropolitan Region which includes Bangkok Province and 4 adjoining provinces. It will run north–south from Thammasat University's Rangsit campus in Pathum Thani Province to Maha Chai in Samut Sakhon Province.

In February 2009, Prime Minister Abhisit Vejjajiva secured a 24 billion baht (US$685 million) loan from the Japanese Government for the 67 km (42 mi) segment.[1][2] The first Phase from Bang Sue to Rangsit was approved in 2010 but delayed due to a complicated 2.5 year contractual dispute. However, Phase 1 finally started construction in 2013. In July 2016 the Cabinet approved the construction from Bang Sue to Hua Lamphong.


The 21.6 km, 6 station (2 to be built later) Rangsit to Bang Sue section finally started construction in May 2013 after new contracts were signed in January 2013.[3] A construction period of 3 years was stated. Construction works were delayed by 2 months due to site access issues for the contractor and delays related to removing slum dwellers residing within the right of way. However, it was hoped that the use of some of the old Hopewell pillars would speed up the initial construction timetable.[4] By the end of 2013, the project was only 3% done & already months behind schedule due to a longer timetable in removing the Hopewell Pillars.[5]

In June 2014, the SRT requested an additional 8.14 billion baht to modify the Dark Red line to 4 tracks instead of 3, to accordingly redesign all stations and to provide for the longer platforms for the Bang Sue Terminal to cater for future HSR lines.[6] 8.140 billion baht request is; 4.32 billion baht for Contract 1 (modifications to Bangsue Central to cater for High Speed trains); 3.35 billion Baht for Contract 2 (4th track and stations redesign) and 473 million baht for Contract 3.

It is worth noting that the budget for the 1st Phase of the Dark Red Line project have progressively increased due to numerous delays and further redesign of the project. From an initial 59.89 billion baht in 2007, to 75.55 billion baht in 2009 and to 80.38 billion baht in 2012. The additional requested 8.14 billion baht will increase the current budget to 88.52 billion baht.

New Intercity Terminal at Bang Sue (Contract 1)[edit]

Contract 1 of the project is for the construction of a new, 4 level Intercity Terminal to cater for all SRT Intercity Trains, SRT Red Line suburban trains and the yet to be built Airport Rail Link extension. The delayed contract process was finally signed in January 2013.[7] In August 2013, the SRT sought extra funds for the project to be redesigned in order to extend upper level platforms to a 400-600m length in order to accommodate future planned High Speed Lines.[8] (Funding was finally requested in June 2014 - see above section)

In March 2013, the new Intercity Terminal at Bang Sue station started construction. Between March and June, excavation works for the foundation of the Terminal were delayed by the unearthing of numerous World War II unexploded bombs which required safe removal by army Explosive Ordnance Teams.[9][10][11] As of July 2014, construction was 10% behind schedule.

The New Terminal was scheduled to open by end of 2016 but the above-mentioned redesign work will most likely delay this timetable.

Rolling stock (Contract 3)[edit]

The 3rd contract for the Dark Red Line is for electrical and systems (E&S) and procuring EMU rolling stock. An overhead cantenary electrical system is specified. As of April 2014, only 2 bidders remained but one of the bidding consortium's was disqualified on due to the fact that one of the consortium members (Maru Beni Corp) had convictions for bribery in an Indonesian bidding process.[12]

This left MHSC Consortium (Mitsubishi and Hitachi and Sumitomo) as the sole bidder qualified for the contract. However, their bid of 28,899 Million Baht was above the SRT median price of 26 billion baht which was however set in 2010. The MHSC Consortium argued that their bid reflects 2013 prices after the minimum wage increase of January 2012. The coup of May 2014 has delayed the finalisation of this contract and negotiations are ongoing.[13] Finally, after a 2-year delay in the bidding process, in July 2014 JICA approved the loan for Contract 3. Final contract approval from the military junta is pending.[14]

Line segments[edit]

  • Bang Sue-Rangsit: 21.6 km (13.42 mi) (under construction)
  • Rangsit-Thammasat: 14.7 km (9.13 mi) (planned)
  • Bang Sue-Hua Lamphong: 11.0 km (6.84 mi) (cabinet approved)
  • Hua Lamphong-Bang Bon-Maha Chai: 39.0 km (24.23 mi) (planned)

Construction segments[edit]

Construction segments based on M-Map:[15]

Phase Segment Length Progress
I Rangsit-Bang Sue 21.6 km (13.42 mi) Under construction
II Bang Sue-Hua Lamphong 11 km (6.84 mi) cabinet approved
III Hua Lamphong-Bang Bon 18 km (11.18 mi) Planned
IV Bang Bon-Maha Chai 20 km (12.43 mi) Planned
V Maha Chai-Maeklong 24 km (14.91 mi) Offered
VI Maeklong-Pak Tho 22 km (13.67 mi)

List of stations[edit]

Code Station Name Thai Express Train City Train Transfer Location
Phase I
x Thammasat University มหาวิทยาลัยธรรมศาสตร์
Pathum Thani
x Chiang Rak เชียงราก
x Khlong Nueng คลองหนึ่ง
x Rangsit รังสิต
x Lak Hok หลักหก
x Don Mueang ดอนเมือง BSicon FLUG.svg Don Mueang International Airport  ARL  (begin construction in September 2016) Bangkok
x Kan Kheha การเคหะ
x Lak Si หลักสี่  MRT : Lak Si (proposed)  ARL  (begin construction in September 2016)
x Thung Song Hong ทุ่งสองห้อง
x Bang Khen บางเขน  MRT : Bang Khen (proposed)
x Wat Samian Nari วัดเสมียนนารี
x Chatuchak จตุจักร BSicon BUS.svg Mochit 2 Northern/Northeastern Bus Terminal
x Bang Sue บางซื่อ  SRT 
 MRT : Bang Sue
 ARL  (begin construction in September 2016)[16]
Phase II
x Pradiphat ประดิพัทธ์  SRT  Bangkok
x Sam Sen สามเสน  SRT 
x Ratchawithi ราชวิถี  SRT   ARL  (begin construction in September 2016)
x Yommarat ยมราช
x Yot Se ยศเส  BTS : Yot Se (proposed extension)
x Hua Lamphong หัวลำโพง  MRT : Hua Lamphong
Phase III
x Khlong San คลองสาน Bangkok
x Wongwian Yai วงเวียนใหญ่  MRT : Wongwian Yai (proposed extension)
x Talat Phlu ตลาดพลู
x Wutthakat วุฒากาศ  BTS : Wutthakat
x Chom Thong จอมทอง
x Wat Sai วัดไทร
x Wat Sing วัดสิงห์
x Bang Bon บางบอน
Phase IV
x Rang Sakae รางสะแก Bangkok
x Rang Pho รางโพธิ์
x Sam Yaek สามแยก
x Phrom Daen พรมแดน
x Thung Si Thong ทุ่งสีทอง Samut Sakhon
x Bang Nam Chuet บางน้ำจืด
x Khok Khwai คอกควาย
x Ekkachai เอกชัย
x Maha Chai มหาชัย

See also[edit]


  1. ^ "Abhisit wins backing for train deal". Bangkok Post. 7 February 2009. 
  2. ^ "B23bn MRT loan inked". Bangkok Post. 30 March 2009. 
  3. ^ "Contracts signed for Red Line stations". The Bangkok Post. Bangkok. 31 January 2013. 
  4. ^ 'Red Line deal inked; some Hopewell pillars to stay', MCOT, 31 January 2013
  5. ^
  6. ^ "SRT seeks extra B8bn for Red Line". The Bangkok Post. Bangkok. 27 June 2014. Retrieved 22 July 2014. 
  7. ^ 'SRT inks deal for Bang Sue rail terminus', Bangkok Post, 19 January 2013
  8. ^,
  9. ^
  10. ^ 'World War II bomb found at MRT project site', The Nation, 3 June 2014
  11. ^
  12. ^
  13. ^
  14. ^ 'JICA green light red line contract 3 Bang Sue - Rangsit after 2 years delay'. 24 July 2014. Economic News,
  15. ^
  16. ^ "New Airport Rail Link to include Don Mueang & U Tapao". Bangkok Post. 25 January 2016. Retrieved 30 March 2016. 

External links[edit]