Purple Line (Bangkok)

The MRT Purple line (Thai: รถไฟฟ้ามหานคร สายสีม่วง) or MRT Chalong Ratchatham line (Thai: รถไฟฟ้ามหานคร สายฉลองรัชธรรม) is Bangkok's fifth rapid transit line, following the Sukhumvit Line, Silom Line, MRT Blue Line, and Airport Rail Link. The line is 23 km (14 mi) long, serving the north-western area of Bangkok running from Tao Poon to Klong Bang Phai in Nonthaburi Province.

MRT Purple Line or
Chalong Ratchatham Line

สายฉลองรัชธรรม
J-TREC sustina trainset
Overview
OwnerMass Rapid Transit Authority
LocaleNonthaburi Province and Bangkok
Termini
Stations16
Color on map    Purple
Service
TypeRapid transit
SystemMRT
Operator(s)Bangkok Expressway and Metro
Depot(s)Khlong Bang Phai
Rolling stockJ-TREC sustina S24
History
Opened6 August 2016
Technical
Line length26.9 km (16.7 mi)
Number of tracks2
Track gauge1,435 mm (4 ft 8+12 in) standard gauge
Electrification750 V DC third rail
Operating speed80 km/h (50 mph)
SignallingBombardier CITYFLO 650 moving block CBTC ATC under ATO GoA 2 (STO), with subsystems of ATP, ATS and CBI
Route map

PP1
Khlong Bang Phai
To Main Depot
PP2
Talad Bang Yai
PP3
Sam Yaek Bang Yai
PP4
Bang Phlu
PP5
Bang Rak Yai
PP6
Bang Rak Noi Tha It
PP7
Sai Ma
Chao Phraya River
PP8
Phra Nang Klao Bridge
PP9
Yaek Nonthaburi 1
PP10
Bang Krasor
 MRT  Pink Line:
Min Buri
PP11
Nonthaburi Civic Center
PP12
Ministry of Public Health
PP13
Yaek Tiwanon
PP14
Wong Sawang
 SRT  Light Red Line:
Taling Chan – Bang Sue
PP15
Bang Son
PP16
Tao Poon
 MRT  Blue Line:
Tha Phra – Bang Sue
Parliament House
Sri Yan
Vajira Hospital
National Library
Bang Khun Phrom
Democracy Monument
 MRT  Orange Line:
Taling Chan – Min Buri
Sam Yot
 MRT  Blue Line:
Bang Khae – Hua Lamphong
Chao Phraya River
Memorial Bridge
 SRT  Dark Red Line:
Maha Chai – Hua Lamphong
Wongwian Yai
 BTS  Silom Line:
Bang Wa – Siam
Somdech Phra Pinklao Hospital
Dao Khanong
Bang Pakaeo
Bang Pakok
Yaek Pracha Uthit
Rat Burana
Phra Pradaeng
Khru Nai

The line opened on 6 August 2016. It is the second line of MRT system and is operated by BEM under a concession contract. Daily ridership is 70,000.

A 23.63 km (14.68 mi), 17 station southern extension of the line consisting of a 14.3 km (8.89 mi) underground section and a 9.3 km (5.78 mi) elevated section commenced construction in August 2022. The cost of the southern extension is $82 billion baht and it is planned to open at the end of 2027. By the end of May 2023, construction had progressed to 11.50%.

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