Blue Line (Bangkok)

The MRT Blue Line (Thai: รถไฟฟ้า สายสีน้ำเงิน) or MRT Chaloem Ratchamongkon Line (Thai: รถไฟฟ้ามหานคร สายเฉลิมรัชมงคล) is Bangkok's third rapid transit line, following the Sukhumvit line and Silom line of the BTS Skytrain. It is the first of the MRT system and is operated by Bangkok Expressway and Metro (BEM). The original 20 km (12.43 mi) MRT Blue Line from Hua Lamphong to Bang Sue opened on 3 July 2004. A 1.2 km (0.75 mi) extension to Tao Poon opened on 11 August 2017. The 15.9 km (9.88 mi) western extension to Lak Song opened for full service on 29 September 2019 and the 11 km (6.84 mi) extension from Tao Poon to Tha Phra to form the quasi loop, opened for full service on 30 March 2020.

MRT Blue Line or
Chaloem Ratchamongkon Line

สายเฉลิมรัชมงคล
The train arriving at Si Lom station
Overview
OwnerMass Rapid Transit Authority
LocaleBangkok
Termini
Stations38
Color on map    Blue
Service
TypeRapid transit
SystemMRT
ServicesTha Phra - Lak Song
Special Services:
Tha Phra - Bang Wa
Phetkasem 48 - Bang Pho
Lak Song - Tao Poon via Phra Ram 9
Lak Song - Tao Poon via Tha Phra Platform 3&4
Operator(s)Bangkok Expressway and Metro
Depot(s)Phra Ram 9
Phetkasem
Rolling stockSiemens Modular Metro EMU-IBL
Siemens Modular Metro EMU-BLE
History
Commenced2 December 1996
Opened3 July 2004
Last extension23 December 2019
Technical
Line length48 km (30 mi)
Elevated:20.78 km (12.91 mi)
Underground:27.22 km (16.91 mi)
Track gauge1,435 mm (4 ft 8+12 in) standard gauge
Electrification750 V DC third rail
Operating speed80 km/h (50 mph)
SignallingSiemens Trainguard LZB700M fixed block ATC under ATO GoA 2 (STO)
Route map

Tha Phra
 MRT 
Charan 13
Fai Chai
Bang Khun Non
 MRT 
Bang Yi Khan
Sirindhorn
Bang Phlat
Bang O
Bang Pho
Tao Poon
 MRT 
Bang Sue
Bang Sue Central
 SRT   SRT   ARL 
Kamphaeng Phet
Chatuchak Park
 BTS 
Phahon Yothin
Lat Phrao
 MRT 
Ratchadaphisek
Sutthisan
Huai Khwang
Thailand Cultural Centre
 MRT 
Rama 9 Depot
Phra Ram 9
Phetchaburi
 SRT   ARL 
Sukhumvit
 BTS 
Queen Sirikit
National Convention Centre
Khlong Toei
Lumphini
Si Lom
 BTS 
Sam Yan
Hua Lamphong
 SRT 
Wat Mangkon
Sam Yot
 MRT 
Sanam Chai
Chao Phraya River
Itsaraphap
Tha Phra
 MRT 
Bang Phai
Bang Wa
 BTS 
Phetkasem 48
Phetkasem Depot
Phasi Charoen
Bang Khae
Lak Song
Phutthamonthon Sai 2
Thawi Watthana
Phutthamonthon Sai 3
Phutthamonthon Sai 4

The line has a total length of 48 km (29.83 mi), being a quasi circle route of the Bangkok rapid transit network. The MRT Blue line connects major business, residential and cultural areas of Bangkok. In late 2019, the average daily ridership was 400,000. In mid 2021, during a COVID-19 3rd wave in Bangkok ridership plummeted to between 76,000 - 116,000 per weekday.

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