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| Bang Na–Suvarnabhumi line | |
|---|---|
| 15 | |
| Overview | |
| Native name | รถไฟฟ้าสายสีเงิน |
| Status | Feasibility study |
| Owner | Mass Rapid Transit Authority of Thailand |
| Locale | Bangkok,Samut Prakan |
| Termini | |
| Stations | 14 |
| Service | |
| Type | Light rail,Rapid transit |
| System | MRT |
| Depot(s) | Thana City depot |
| History | |
| Opened | Undetermined |
| Technical | |
| Line length | 19.7 km (12.2 mi) |
| Number of tracks | 2 |
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in)standard gauge |
| Electrification | Third rail |
| Operating speed | 80 km/h (50 mph) |
TheBang Na–Suvarnabhumi line is a proposedlight rail line inBangkok that would run fromBang Na junction toSuvarnabhumi Airport. The line was first proposed in 1994, but it was not included in the 2005 OTPMass Rapid Transit Master Plan. Initially, it was planned for the line to potentially be aBTS Sukhumvit Line branch line with turnouts constructed near Bang Na junction. In December 2015, theBMA said it would advance construction and would propose it to cabinet in the near future.[1] In April 2016, deputy governor Amorn Kitchawengkul said the project would take 3–6 years and cost THB 20 billion.
The line would be proposed to be constructed in two phases. Firstly, for 14.7 km to Thana City and then a later 5.1 km extension to the airport.[2] The project would relieve congestion along the busy Bang Na - Trat rd corridor and provide an important southern connection toSuvarnabhumi Airport.[3] Initial forecasts of daily passengers are 56,000 upon opening rising to 139,000 daily when the extension to the airport opens.[4]
In early September 2021, the BMA contracted consultants to undertake a 6-month feasibility study into the line.[5] The feasibility study was completed in March 2022. On 8 April 2022, the BMA deputy permanent secretary conducted a market sounding seminar to detail the project to potential investors and advised that the report would be submitted to the Interior Ministry for endorsement.[6] If the Interior Ministry approves the project it will be submitted to Cabinet for approval in 2023.[7]
The BMA proposes to gain Cabinet approval for the line in 2023 and conduct a tender in 2024 with a suggested three year construction period commencing in 2025 for a targeted opening date of 2029.[8] However, BMA transferred the project to theMass Rapid Transit Authority of Thailand (MRTA) on December 27, 2024, as it is believed that consolidating the project under a single owner will enable better control of fare prices, preventing them from becoming excessively high. After the transfer, the MRTA will reassess the project to determine the feasibility of further construction.
This section starts at the Sunphawut road (in front of MEA Bang Na District, Bang Na District Office, and Phra Khanong Provincial Court), runs along the said road, pass Bang Na intersection, above the outbound Debaratana road's median, pass across Si Iam interchange which connects toMRTA Yellow Line, over the Kingkaew interchange which is a transfer point toKingkaew-Suvarnabhumi Monorail, and terminate at Thana City. This section's ending terminus is at the 13th km of Debaratana road and the depot of the line itself. There will be a 46,400 sq.m. depot at Thana City, which the BMA will purchase fromU City Public Co. Ltd., the owner of Thana City project.[9]
The line continues from the Thana City and passes Central Village andKrirk University before crossing Nong Prue and Nong Ngu Hao canal. The terminus is the future south terminal ofSuvarnabhumi Airport which has not yet started construction. However,AoT has modified the terminal to give the line direct access to the passenger building, unlikeSuvarnabhumi ARL Station which was built in an unused Novotel Suvarnabhumi walkway.
The line initially appeared on the 1994Mass Rapid Transit Master Plan (MTMP), before it was further improved in the 1996 CTMP. It was an extension to theTanayong SkyTrain until it was canceled whenUrban Rail Transportation Master Plan in Bangkok and Surrounding Areas (URMAP) was developed in 2000. Then, in a 2004 OTP meeting, it was decided that the route needed to be expanded to meet the need of the expanding Bangkok. The route was finally determined to terminate at the Sri Iam interchange and Suvarnabhumi Airport. However, the line was not included in the 2005 OTPMass Rapid Transit Master Plan.
When theBTS Sukhumvit Line extension from On Nut to Bearing was completed in August 2011. provision was made with turnouts constructed near Bang Na junction for a future BTS spur line from Bang Na junction to the airport. However, the BMA later decided that the line would be a separate light-rail line.
In early September 2021, the BMA Traffic and Transport Department contracted consultants to undertake a six-month feasibility study into the line.[11] The consultants would evaluate a PPP framework for the project and conduct market sounding seminars as part of the study.[12] The line would be proposed to be constructed in two phases. Firstly, for 14.7 km to Thana City and then a later 5.1 km extension to the Airport.[13] Initial forecasts of daily passengers are 56,000 upon opening rising to 139,000 daily when the extension to the airport opens.[14]
The feasibility study was completed in March 2022. On 8 April 2022, the BMA deputy permanent secretary conducted a market sounding seminar to detail the project to potential investors and advised that the report would be submitted to the Interior Ministry for endorsement.[15] The BMA stated that the study concluded that the LRT should have a maximum speed of 80 kilometres/hour with a 30-minute trip time with capacity for 15,000 to 30,000 passengers per hour. If the Interior Ministry approves the project it will be submitted to Cabinet for approval in 2023.[16]
The LRT system will be 1.435 m (standard gauge) withthird railelectrification and max speed of 80 kph with automatic signalling system, allowing the round trip in 1 hour. The LRT rolling stock will be 4 car formation able to transport between 15000 - 30000 passengers per hour. The minimum fare is planned to be 14 baht to a maximum 46 baht.[17]
There are 14 stations planned including 13 elevated stations and 1 underground station at the airport.Station names are subject to change.[18] Station codes are still not determined. Each station is planned to be equipped withplatform screen doors.
| Code | Station Name | Thai | Transfer | Location |
|---|---|---|---|---|
| SV01 | Bang Na | บางนา | BTS : Bang Na, Udom Suk | Bangkok |
| SV02 | Prapha Montri | ประภามนตรี | ||
| SV03 | Bang Na–Trat 17 | บางนา–ตราด 17 | ||
| SV04 | Bang Na–Trat 25 | บางนา–ตราด 25 | ||
| SV05 | Wat Si Iam | วัดศรีเอี่ยม | MRT : Si Iam | |
| SV06 | Prem Ruethai | เปรมฤทัย | Samut Prakan | |
| SV07 | Bang Na–Trat Km.6 | บางนา–ตราด กม. 6 | ||
| SV08 | Bang Kaeo | บางแก้ว | ||
| SV09 | Kanchanaphisek | กาญจนาภิเษก | ||
| SV10 | Wat Salut | วัดสลุด | ||
| SV11 | King Kaeo | กิ่งแก้ว | ||
| SV12 | Thana City | ธนาซิตี้ | ||
| SV13 | Krirk University | มหาวิทยาลัยเกริก | ||
| SV14 | Suvarnabhumi South Terminal | สุวรรณภูมิ อาคารใต้ |  ARL : Suvarnabhumi | |
