MRTA Yellow Line

The line starts at the intersection of Ratachadapisek and Lat Phrao roads where it interchanges with the MRT Blue Line at Lat Phrao station. The line then heads east along Lat Phrao road to Bangkapi junction where it will interchange with the Orange Line Lam Sali station, before heading south along Srinagarindra Road to Hua Mark where it will interchange with the Airport Rail Link Hua Mak station.

From Hua Mark the route continues south along Srinagarindra Road past Bangna-Trat Road all the way to Thepha Rak Road in Samut Prakan Province, then heading west along Thepha Rak Road before terminating at Samrong of the BTS Sukhumvit Line.[2]

The line will be built from Ratchada (Y1) to Samrong (Y23), with construction planned to take four years to complete. The Yellow Line depot will be located at Debaratana Road adjacent to Si Iam station. [3]

The line was first proposed by the Office of Transport and Traffic Policy and Planning (OTP) in 2004 as a heavy rail underground and elevated metro line as part of the 10 line metro plan which was taken to the February 2005 election. In 2009, it was suggested to change the line to an elevated monorail line as a cost saving measure. In December 2011, the MRTA was instructed by the MOT to divide the Yellow Line into two phases for tender and construction purposes and to control land appropriation costs.[4] In June 2012, the MRTA contracted consultants to undertake detailed designs of the Yellow Line. In February 2013, OTP stated that the tender for the Yellow Line should be ready by late 2013 for tender in early 2014.[5] By August 2013, this timeline had changed to a mid-2014 tender date.[6]

However, similar to the MRT Pink Line, delays in finalising the technical requirements of the tender in relation to the selection of monorail rolling stock which determines the type of track to be constructed resulted in further delays. The subsequent political turmoil of late 2013 and early 2014 caused even more delay. Thereafter, the coup of May 2014 resulted in a new military administration and the tender being deferred for 2014. The MRTA tender was subsequently not released until mid-2016. In early December 2016, BSR Joint Venture (comprising BTS Group Holdings which owns 75%, Sino-Thai Engineering and Construction - STEC, and Ratchaburi Electricity Generation Holding - RATCH), won the bid for the line. The BSR also won the bid for the Pink Line. [7]

On June 16 2017, a contract was signed for the line with the Mass Rapid Transit Authority of Thailand and a consortium including BTS Group Holdings, Sino-Thai Engineering and Construction, and Ratchaburi Electricity Generation Holding. BSR has also established Eastern Bangkok Monorail Company Limited to operate the monorail. A proposed 2 station extension of the route north from the current Ratchada terminus to link to Sukhumvit Line Extension at Ratchayothin station is awaiting approval from the government.[8]

Construction of the MRT Yellow Line began in March 2018 with the BSR consortium establishing a number of preparation work sites along the Lat Phrao rd with the closure of lanes along this traffic dense east-west corridor. By August 2018, construction had expanded to along the Srinakarin rd section which is also where the depot will be built [9] By 30 September 2018, overall construction had progressed to 9.61% [10] At the end of March 2019, construction has progressed to 30.40%[11] By the end of July 2019, civil construction had further advanced to 39.92% [12] At the end of October 2019, construction had progressed to 45.88%[13] By the end of January 2020, construction had progressed to 51.81%[14]

By the end of May 2020, construction had progressed to 59.42%[15]

BSR has selected Bombardier INNOVIA 300 monorail rolling stock for the Yellow line.[16] The BSR has announced that they will purchase 28, 4 car sets to operate the Yellow line.[17]

The 30.4 km Yellow Line will have 23 stations (with a proposed extension of two stations):[18]

Code	Station Name	Transfers	Opening	Province
YLEX-02	Phaholyothin 24 (proposed extension)	BTS  Phahon Yothin 24	2022	Bangkok
YLEX-01	Chankasem (proposed extension)
Y1	Lat Phrao	MRT  Lat Phrao
Y2	Phawana
Y3	Chok Chai 4
Y4	Lat Phrao 71
Y5	Lat Phrao 83	MRL  Chalong Rat  MRT  Chalong Rat
Y6	Mahatthai
Y7	Lat Phrao 101
Y8	Bang Kapi
Y9	Yaek Lam Sali	MRT  Yaek Lam Sali  MRT  Yaek Lam Sali
Y10	Si Kritha
Y11	Patthanakan	SRT  Hua Mak  ARL  Hua Mak
Y12	Khlong Kalantan
Y13	Si Nut
Y14	Srinagarindra 38
Y15	Suan Luang Ro 9 (King Rama IX Park)
Y16	Si Udom
Y17	Si Iam	BTS  Wat Si Iam (proposed)
Y18	Si La Salle
Y19	Si Bearing			Samut Prakan
Y20	Si Dan
Y21	Si Thepha
Y22	Thipphawan
Y23	Samrong	BTS  Samrong

When completed the Yellow Line will terminate at Samrong. A future extension from Samrong across the Chao Phraya River to link with the MRT Purple Line at Rat Burana has been canvassed by OTP.

• Mass Rapid Transit Master Plan in Bangkok Metropolitan Region
• Bangkok Metro
• MRT Brown Line
• MRT Blue Line
• MRT Grey Line
• MRT Light Blue Line
• MRT Orange Line
• MRT Pink Line
• MRT Purple Line
• BTS Skytrain
• Sukhumvit Line
• Silom Line
• Airport Rail Link (Bangkok)
• SRT Light Red Line
• SRT Dark Red Line
• Bangkok BRT
• BMA Gold Line.

Wikimedia Commons has media related to MRT Yellow Line.

• Official website

• Airport Rail Link, BTS, MRT & BRT network map