SRT Dark Red Line

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SRT Dark Red Line
สายสีแดงเข้ม
SRTRedline 1000series WiteePhotography. For wikipedia.jpg
SRT Dark Red Line train at Rangsit Station
Overview
Native nameสายสีแดงเข้ม
OwnerState Railway of Thailand
TerminiBang Sue
Rangsit
Stations10
Service
TypeCommuter rail
SystemBangkok Suburban Commuter Train
Operator(s)SRTET - SRT Electrified Train Company Limited
History
Opened2 August 2021 (free trial service)
1 November 2021 (commercial service)[1]
(Phase 1 Rangsit - Bang Sue) - open
(Phase 2 Rangsit - Thammasat Uni)
(Phase 3 Bang Sue - Hua Lamphong)
(Phase 4 Hua Lamphong - Maha Chai)
Technical
Line length86.8 km (53.94 mi) (Total planned)
Track length26 km (16.16 mi) (Phase 1)
Track gauge1,000 mm (3 ft 3+3⁄8 in) metre gauge
ElectrificationOverhead lines
Operating speed160 km/h (99 mph) (maximum)
Route map

Legend
km
Up arrow SRT Northern & Northeastern Lines
Future North Extension
32.6
Thammasat University
29.9
 Chiang Rak
Bangkok University
26.2
 Khlong Nueng
22.6
 Rangsit
19.9
 Lak Hok (Rangsit University)
13.8
 Don Mueang
11.8
 Kan Kheha
(Left arrow  MRL  Pink Line Right arrow)
9.9
 Lak Si
7.1
 Thung Song Hong
5.6
 Bang Khen
4.1
 Wat Samian Nari
2.6
 Chatuchak
Left arrow  SRT  to Talingchan
Left arrow SRT Southern Line
Bang Sue Junction
0.0
 Bang Sue Central
Left arrow  MRT  Blue Line Right arrow
Pradiphat
2.7
 Sam Sen
3.7
 Ratchawithi
Ramathibodi Hospital Halt
ARLbangkok.svg  ARL  To Suvarnabhumi Right arrow
 SRT  to Hua Mak Right arrow
Yommarat Halt
SRT Eastern Line Right arrow
5.4
 Yommarat
Urupong Halt
6.5
 Yotse
7.5
 Hua Lamphong
Bangkok railway station
Left arrow  MRT  Blue Line Right arrow
Future South Extension
Khlong San  BTS 
Up arrow  BTS  Silom Line
Left arrow  MRT  Purple Line Right arrow
Wongwian Yai
Down arrow SRT Maeklong Railway
Talat Phlu
Left arrow  BTS  Silom Line
Wutthakat
Taksin
Khlong Ton Sai
Chom Thong
Wat Sai
Wat Singh
Bang Bon
Khan Keha
Rang Sakae
Rang Pho
Sam Yaek
Phrom Daen
Thung Si Thong
Bang Nam Chuet
Khok Khwai
Ban Khom
Khlong Chak
Maha Chai
This diagram:
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The SRT Dark Red Line is part of the SRT Red Line suburban railway system to serve the greater Bangkok Metropolitan Region which includes Bangkok Province and 4 adjoining provinces. The completed line will run on a north–south axis through Bangkok, from Thammasat University's Rangsit campus in Pathum Thani Province to Maha Chai in Samut Sakhon Province for a full length of nearly 87 km. As of 2 August 2021, a free trial service runs for 10 stations between Bang Sue Grand Station and Rangsit.

Construction started in 2013 and was originally due to be completed within 3 years by the end of 2016. However, the project has experienced numerous delays. In May 2018, the SRT announced that the line was expected to open by October 2020 with fares to be set at between 14-45 baht.[2] At the end of September 2019, civil construction fully completed[3] with only signaling and electrical systems to be installed. By July 2020, S&E installation was at 85.12% completion.[4]

As of September 2020, 21 of the 25 sets of rolling stock has been delivered and limited test runs from Wat Samian Nari to Rangsit began in August 2020 operating at a maximum speed of 120km/h. The test runs were extended to Bang Sue Grand Station from late November 2020.[5] In mid November 2020, the Minister of Transport announced that free trial operations will operate from March to May 2021 with full service operations expected from November 2021.[6] In late February 2021, the SRT confirmed that free trial operations will commence on 26 March 2021 with full commercial operations starting on 28 July 2021.[7] In July , the SRT postpone service and confirmed that free trial operations will commence on 2 August 2021 with full commercial operations starting on 1 November 2021.[8]

On 10 February 2021, the Department of Railways announced that in April 2021 the SRT would issue the tenders for the northern extension to Thammasat University and the southern extension to Hua Lamphong station.[9]

Route Alignment[]

Initially, the SRT Dark Red Line will run from the new Bang Sue Grand Station north for 21.6 km via Don Mueang and terminate at Rangsit in Pathum Thani Province. The line will then be extended a further 10 km north from Rangsit to Thammasat University's Rangsit campus. From Bang Sue Grand Station the line will be extended 11 km south via Phaya Thai to terminate at Hua Lamphong station. The final section of the line will run south east from Hua Lamphong for 39 km to Maha Chai in Samut Sakhon Province via Wong Wian Yai along the current Maha Chai railway alignment.

When completed, the SRT Dark Red Line will run from Thammasat University's Rangsit campus in Pathum Thani Province to Maha Chai in Samut Sakhon Province for a total of 87 km.

History[]

In February 2009, then Prime Minister Abhisit Vejjajiva secured a 24 billion baht (US$685 million) loan from the Japanese Government for the 67 km (42 mi) segment.[10][11] The first Phase from Bang Sue to Rangsit was approved in 2010 but delayed due to a complicated 2.5 year contractual dispute.

The 21.6 km, 10 station Rangsit to Bang Sue section finally started construction in May 2013 after new contracts were signed in January 2013.[12] A construction period of 3 years was stated. By the end of 2013, the project was only 3% done & already months behind schedule due to delays in removing the Hopewell Pillars.[13] 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 Grand Station to cater for future HSR lines.[14] 8.140 billion baht request is; 4.32 billion baht for Contract 1 (modifications to Bang Sue Grand Station 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.

The budget for the 1st Phase of the Dark Red Line project has 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.

Construction Progress: Bang Sue to Rangsit (Phase 1)[]

The 21.6 km, 9 station Bang Sue to Rangsit section finally started construction in May 2013 with a scheduled construction period of 3 years. 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.[15] 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.[16]

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.[17] 8.140 billion baht request is; 4.32 billion baht for Contract 1 (modifications to Bang Sue Grand Station 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.

As of September 2017, civil works progress was stated to be 88.63%.[18] By the end of September 2019 civil works were almost fully complete at 99.56% and Electrical and Signalling installation was at 45.60%.[19] By July 2020, S&E installation was at 80%.[20] By October 2020, 90% of the power supply for the line had been installed by the Metropolitan Electricity Authority (MEA) with all installation due to be completed by November.[21]

Bang Sue Grand Station (Contract 1)[]

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 (Bangkok) extension. The delayed contract process was finally signed in January 2013.[22] In August 2013, the SRT sought extra funds for the project to be redesigned in order to extend upper level platforms to a 400-600 m length in order to accommodate future planned High Speed Lines.[23] (Funding was finally requested in June 2014 - see above section)

In March 2013, the new Bang Sue Grand 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.[24][25][26] As of July 2014, construction was 10% behind schedule.

The new Bang Sue Grand Station was originally scheduled to open by end of 2016 but the above-mentioned redesign work and other delays have resulted in an expected 2020 opening date. As of September 2017, construction progress of the station civil works was at 57.50%.[27] By the end of September 2019 civil works were at 86.01%.[28] As at July 2020, civil works were almost complete at 99.8%.[29]

Rolling stock (Contract 3)[]

The 3rd contract for the Dark Red Line is for electrical and systems (E&S) and procuring EMU rolling stock. An overhead catenary 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.[30]

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 set in 2010. The MHSC Consortium argued that their bid reflects 2013 prices after the minimum wage increase of January 2012. Finally, after a 2-year delay in the bidding process, in July 2014 JICA approved the loan for Contract 3.[31] However, the coup of May 2014 delayed finalization leading to further review and negotiations. By mid 2016, negotiations had concluded and Hitachi promised that all rolling stock for the Dark Red line would be delivered by 2020.[32] The contract specifies 25 EMUs consisting of ten 4 car sets and fifteen 6 car sets for 130 cars in total.

In late September 2019, the first 2 sets of rolling stock were shipped from Japan[33] and both arrived in Thailand at Laem Chabang port on 12 October 2019 for shipment to Bangkok.[34] By March 2020, 5 sets had been delivered.[35]

As of July 2020, 13 sets - 7 of the 6 car sets and 6 of the 4 car sets - of the total 25 sets of rolling stock had been delivered with a further 2 sets due to be delivered by August 2020.[36] By the end of September 2020, 21 sets had been delivered - 13 of the 6 car sets and 8 of the 4 car sets - with the final 4 sets to be delivered in October.[37]

Future extensions[]

In July 2016, the Thai Cabinet approved the first section of the southern extension from Bang Sue to Hua Lamphong. However, the 10 km 4 station northern extension from Rangsit to Thammasat University will be built first and was originally expected to be tendered by September 2018.[38] This was delayed and then due to be tendered in the 2nd half of 2019.[39] However, the tender has yet again been further delayed until 2021 as the Transport Minister has requested that the new Department of Railways investigate conducting PPP tenders for this extension.[40] On 10 February 2021, the Department of Railways announced that in April 2021 the SRT would issue the tenders for the north extension to Thammasat University and the south extension to Hua Lamphong station.[41]

Construction segments based on M-Map:[42]

Phase Segment Length Progress
I Rangsit-Bang Sue 26 km (16.16 mi) Free trial service from 2 August 2021
II Thammasat University-Rangsit 10 km (6.21 mi) Tender April 2021
III Bang Sue-Hua Lamphong 11 km (6.84 mi) Tender April 2021
IV Hua Lamphong-Bang Bon 18 km (11.18 mi) Planned
V Bang Bon-Maha Chai 20 km (12.43 mi) Planned
VI Maha Chai-Maeklong 24 km (14.91 mi) Suggested
VII Maeklong-Pak Tho 22 km (13.67 mi)

There is a future extension that is not included in M-Map, but is included in information brochures.[43]

Phase Segment Length Progress
TBA Thammasat University-Phachi Junction Railway Station Unknown Unknown

Phase II Rangsit-Thammasat University: 10.0 km (6.21 mi) (planned for tender in 2021)[]

The 10 km, 4 station was approved by Cabinet in 2016 and was expected to be tendered by September 2018.[44] The extension to Thammasat University was then to be tendered in the 2nd half of 2019.[45] However, the tender has further been delayed until 2021 as the Transport Minister has requested the new Department of Railways to investigate conducting PPP tenders for this extension.[46]

Phase III Bang Sue-Hua Lamphong: 11.0 km (6.84 mi) (cabinet approved)[]

The 11 km, 7 station southern extension to Hua Lumphong station was approved by Cabinet in 2016. However, the northern extension to Thammasat University will be built before this section.[47]

Phase IV & V Hua Lamphong-Bang Bon-Maha Chai: 39.0 km (24.23 mi) (planned)[]

The last section of the line will run south east from Hua Lumphong to Maha Chai in Samut Sakhon Province via Wong Wian Yai along the current Maha Chai railway alignment.

Potential extension from Maha Chai to Ratchaburi[]

The Office of Transport and Traffic Policy and Planning (OTP) have studied the improvement and construction of the Mae Klong railway line[48] which will be constructed through Samut Sakhon, Samut Songkhram and Ratchaburi provinces. It will use a bypass route in Samut Sakhon Province by deviating from the original train line for about 31 km. Between and , the line will be elevated across Ekachai road and deviate along the route of Rama II Road around the km 26 + 800 to the 32 + 160 km, then divert to the left to go straight to connect with the original train line.

From Samut Songkhram the suggested route will be constructed across the Mae Klong River. A third option is expected to be in use, which is to bypass Samut Songkhram city By diverging from the original train line about 66 km after passing , which will be an elevated railway along the National Highway No. 325 to cross the Mae Klong Canal And Highway 325 at the intersection to Damnoen Saduak District, approximately 40 + 850 km and crossing the Mae Klong River. It will then revert to ground level and end at Pak Tho Railway Station, Ratchaburi which will build a train parallel with the royal highway number 3093 and will have 3 more new railway stations in this section. Expected total value of this project is approximately 42,243 million baht.[49]

When completed, it will be a new southern railway line, which will help shorten the original train route, which originally runs through Nakhon Pathom and Ratchaburi before going to Pak Tho Station. The new Southern Railway will reduce the distance by about 43 kilometres and the aim of the project also includes the development of the Southwest Transport Center. However, as of 2016 this planned southern extension is very unlikely to be built as when Cabinet approved the northern extension to Thammasat University and the Southern extension to Hua Lumphong, only the original project scope to Maha Chai was referenced.

List of stations[]

Code Station Name Thai Express Train City Train Transfer Location
Phase II - Northern extension
RN14 มหาวิทยาลัยธรรมศาสตร์
ศูนย์รังสิต 		● ● Pathum Thani
RN13 เชียงราก ●
RN12 มหาวิทยาลัยกรุงเทพ ●
RN11 คลองหนึ่ง ●
Phase I
RN10 Rangsit รังสิต ● ● Pathum Thani
RN09 Lak Hok (Rangsit University) หลักหก (มหาวิทยาลัยรังสิต) ●
RN08 Don Mueang ดอนเมือง ● ● BSicon FLUG.svg Don Mueang International Airport ARLbangkok.svg  ARL  (approved) Bangkok
RN07 Kan Kheha การเคหะ ●
RN06 Lak Si หลักสี่ ●  MRL : (under construction)
RN05 Thung Song Hong ทุ่งสองห้อง ●
RN04 Bang Khen บางเขน ●  MRT : (approved, proposed tender in 2021)
RN03 Wat Samian Nari วัดเสมียนนารี ●
RN02 Chatuchak จตุจักร ●
RN01 Bang Sue บางซื่อ ● ●  SRT 
 MRT : Bang Sue

ARLbangkok.svg  ARL (approved)

RS01
Phase III - Southern extension
RS02 Pradiphat ประดิพัทธ์ ●  SRT  Bangkok
RS03 Sam Sen สามเสน ●  SRT 
RS04 Ratchawithi ราชวิถี ●  SRT 
RS05 ยมราช ●  MRT : Yommarat (currently under tender)
RS06 ยศเส ●  BTS : (proposed extension)
RS07 หัวลำโพง ● ●  MRT : Hua Lamphong
Phase IV
RS08 คลองสาน ● Bangkok
RS09 Wongwian Yai วงเวียนใหญ่ ●  BTS : Wongwian Yai  MRT : Wongwian Yai (approved, tender planned for late 2020)
RS10 Talat Phlu ตลาดพลู ●  BTS : Talat Phlu
RS11 ตากสิน ● ●  BTS : Wutthakat
RS12 จอมทอง ●
RS13 วัดไทร ●
RS14 วัดสิงห์ ● ●
RS15 บางบอน ●
Phase V
RS16 รางสะแก ● Bangkok
RS17 รางโพธิ์ ● ●
RS18 สามแยก ●
RS19 พรมแดน ●
RS20 ทุ่งสีทอง ● ● Samut Sakhon
RS21 บางน้ำจืด ●
RS22 คอกควาย ●
RS23 เอกชัย ● ●
RS24 มหาชัย ● ●
Phase VI (Unlikely to be built)
x ท่าฉลอม Samut Sakhon
x นกเล็ก
x สีคต
x บางกระเจ้า
x บ้านบ่อ
x ��างโทรัด
x บ้านกาหลง
x บ้านนาขวาง
x บ้านนาโคก
x บ้านเขตเมือง Samut Songkhram
x ลาดใหญ่
x บางกระบูน
x แม่กลอง
Phase VII (Unlikely to be built)
x บางขันทอง Samut Songkhram
x ปลายโพงพาง
x วัดเพลง Ratchaburi
x Pak Tho ปากท่อ SRT Southern line

See also[]

References[]

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