The State Railway of Thailand (SRT) has announced the tender for the extension of the Red Line suburban railway system, covering the Rangsit to Thammasat University Rangsit Center segment and the Siriraj to Taling Chan to Salaya segment. Tender documents are available for download from today until 28 December 2025 GMT+7.
According to a report from the State Railway of Thailand (SRT), the SRT has opened an electronic bidding (e-bidding) process for the construction of the Dark Red Line suburban railway extension from Rangsit to Thammasat University Rangsit Center, and the Light Red Line suburban railway project from Siriraj to Taling Chan to Salaya. This includes three additional stations: Rama VI Bridge Station, Bang Kruai-EGAT Station, and Ban Chimphli Station. Interested parties may download the tender documents from today until 28 December 2025 GMT+7.
Mr. Anan Phonnimdaeng, Deputy Governor of the State Railway of Thailand and Acting Governor, revealed that the SRT has published the tender documents for e-bidding for the construction of the Dark Red Line suburban railway extension from Rangsit to Thammasat University Rangsit Center, with a construction budget estimated at 6,064.96 million baht. The Light Red Line suburban railway project from Siriraj to Taling Chan to Salaya, including three additional stations (Rama VI Bridge Station, Bang Kruai-EGAT Station, and Ban Chimphli Station), has a construction budget estimated at 14,729.70 million baht.
The Dark Red Line suburban railway project from Rangsit to Thammasat University Rangsit Center was approved by the Cabinet on 7 January 2025, allowing the SRT to adjust the project budget to 6,473.98 million baht (a reduction of 96.42 million baht). The construction period is 36 months, covering 8.84 km, with the entire structure at ground level. Two new tracks will be built with a track gauge of 1.00 meter, including 4 stations: Khlong Nueng, Bangkok University, Chiang Rak, and Thammasat University Rangsit Center. Most construction land is owned by the SRT, with about 14 rai of additional land to be expropriated for station construction and access roads. The land expropriation decree is currently being processed and is expected to be published in the Royal Gazette by February 2026.
Regarding the Light Red Line suburban railway project from Siriraj to Taling Chan to Salaya and the three additional stations (Rama VI Bridge Station, Bang Kruai-EGAT Station, and Ban Chimphli Station), the Cabinet approved on 17 June 2025 the consolidation of the Taling Chan to Salaya segment and the three additional stations together with the Taling Chan to Siriraj Light Red Line segment into a single project for procurement under one contract. The project budget was adjusted to 15,176.21 million baht (a reduction of 1,671 million baht). Construction will last 36 months, covering 20.50 km, including 6.67 km elevated track and 13.83 km at ground level. The 9 stations are Siriraj, Bang Khun Non, Taling Chan Floating Market, Rama VI Bridge, Bang Kruai-EGAT, Ban Chimphli, Kanchanaphisek, Salathammasop, and Salaya. All construction land belongs to the SRT with no land expropriation required.
Interested parties may download the tender documents from today until 28 December 2025 GMT+7. Electronic bidding will take place on the government procurement system (e-GP) on 29 December 2025 from 09:00 to 12:00. The winners for both projects will then be announced, with contracts expected to be signed by February 2026. After contract signing, the SRT will issue a Notice to Proceed in March 2026. Construction is planned to take 36 months, with completion expected by February 2029 and service commencement starting March 2029.
/" Government Policy /" Additional