SRT Light Red Line

SRT Light Red Line
SRT Light Red Line train at Bang Bamru railway station
Overview
Other name(s)	Nakhon Withi Line
Native name	สายนครวิถี
Status	Operational (Phase I)
Owner	State Railway of Thailand
Locale	Bangkok Metropolitan Region
Termini	Krung Thep Aphiwat Taling Chan
Stations	4
Website	State Railway of Thailand
Service
Type	Commuter rail
System	SRT Red Lines
Operator(s)	SRTET - SRT Electrified Train Company Limited
Depot(s)	Chatuchak, Bangkok
Rolling stock	Hitachi AT100
History
Opened	2 August 2021 (2021-08-02) (free trial service)[1] 29 November 2021 (2021-11-29) (commercial service)[2]
Technical
Line length	15.26 km (9.48 mi)
Number of tracks	2
Character	Elevated
Track gauge	1,000 mm (3 ft 3+3⁄8 in) metre gauge
Electrification	25 kV 50 Hz AC overhead catenary
Operating speed	90 km/h (56 mph)
Signalling	Thales AlTrac for ERTMS (ECTS Level 1)[3]
Route map Legend SRT Eastern line  ARL : Suvarnabhumi Hua Mak  MRT  Sukhumvit 71 Halt Ramkamhaeng  ARL  Khlong Tan Asok Makkasan Phetchaburi  MRT  Makkasan Ratchaprarop  ARL  Phaya Thai  BTS  SRT Eastern line  SRT  to Hua Lumphong SRT Northern & Northeastern lines Ratchawithi Sam Sen Pradiphat Bang Sue  MRT  Krung Thep Aphiwat Central Terminal Bang Sue Junction Red Line EMU Depot  ARL : Don Mueang  SRT  to Don Mueang SRT Northern & Northeastern lines Bang Son  MRT  Phra Ram 6 Bang Kruai (EGAT) Bang Bamru Thonburi-Siriraj Charansanitwongse Taling Chan Market Branch to Thonburi Taling Chan km West Extension km Ban Chimphli  Phuttamonthon Sai 2 Halt Sala Thammasop Sala Ya SRT Southern line This diagram: view talk edit

The SRT Light Red Line, or Nakhon Withi Line (Thai: รถไฟชานเมือง สายนครวิถี) is a 15 km (9.3 mi) between Krung Thep Aphiwat Central Terminal and Taling Chan and is part of the SRT Red Lines suburban railway system serving the greater Bangkok Metropolitan Region.

An initial segment from Taling Chan to Bang Son previously opened for limited, free trial service between 5 December 2012 and 13 January 2014 with only 12 services a day until all services were fully suspended due to the lack of rolling stock. After a much-delayed completion of the electrification of the line and the construction of Krung Thep Aphiwat Central Terminal, the line finally opened for trial operations on 2 August 2021. Full commercial services commenced on 29 November 2021.^[4]

A much delayed 15 km (9.3 mi) western extension of the line from Taling Chan to Salaya was due to be tendered in June 2022.^[5] However, this was later delayed to December 2022 and then until February 2023. With the 14 May 2023 national elections and the ongoing delays in the formation of a new government, it is unlikely that the tenders will be issued until late 2023. In late June, a MOT source expressed that the extension is likely be taken to Cabinet for approval in October 2023 and if approved, a tender could be issued in the first quarter of 2024.^[6]

When fully completed, the line will run east–west from Salaya, Thailand in Phutthamonthon District of Nakhon Pathom Province to Hua Mak railway station in Bangkok.