Thailand’s State Railway Launches KIHA 40-48 Feeder Service Connecting Don Mueang and Ayutthaya

Brickinfo News Agency – The State Railway of Thailand (SRT) has officially launched a trial feeder service using refurbished KIHA 40 and KIHA 48 air-conditioned diesel railcars to bridge the gap between Don Mueang and Ayutthaya. Starting April 20, 2026, the service aims to provide a seamless connection for passengers traveling between the capital and the historic province, specifically linking with the SRT Red Line and Don Mueang International Airport. This six-month trial is designed to offer a cost-effective and convenient alternative for daily commuters and tourists amid fluctuating energy prices.

The KIHA 40 and KIHA 48 fleet, known for its mobility and classic design, has seen six units fully renovated to meet modern service standards. The initial phase operates from Monday to Friday, offering six round trips per day until October 31, 2026. The route includes nine strategic stops: Don Mueang, Rangsit, Chiang Rak, Thammasat University Halt, Chiang Rak Noi, Khlong Phutsa, Bang Pa-in, Ban Pho, and Ayutthaya. The SRT intends to monitor passenger volume closely during this period to determine if the service should be expanded or adjusted based on public demand.

Regarding the project’s strategic goals, the SRT stated:

“The trial operation of KIHA 40 and KIHA 48 as a feeder service between Bangkok and Phra Nakhon Si Ayutthaya marks another significant step in upgrading the rail network. It enhances connectivity, speed, and efficiency for the public’s daily travel in a tangible way, and we remain ready to improve the service to meet passenger needs.”

Beyond the feeder service, the SRT provided updates on the Thai-Chinese High-Speed Railway project, specifically Contract 4-5 for the Ban Pho–Phra Kaeo section. While civil works have faced some delays, the project remains a critical piece of infrastructure for regional connectivity. A key highlight is the redesign of the Ayutthaya Station to protect its UNESCO World Heritage status. Following recommendations from UNESCO and the Fine Arts Department, the station’s height has been reduced from 54 meters to 28 meters, and the track structure lowered from 19 meters to 17 meters to harmonize with the historical landscape.

The construction of the new Ayutthaya Station is part of a 36-month development plan, which includes archaeological surveys to ensure the preservation of historical artifacts. The station will feature a 450-meter long platform and three main entrances, integrated with modern facilities and landscape architecture. Construction in the station area will proceed once final approval is granted by the Fine Arts Department following the completion of archaeological fieldwork.

To showcase the versatility of the Thai rail network, the SRT also organized a survey of a potential One Day Trip tourism route. This circuit spans Bangkok, Ayutthaya, Ban Phachi Junction, the Phra Phutthachai Tunnel, Khlong Sip Kao Junction, and Chachoengsao. The route highlights the ability to visit significant cultural and religious sites in two provinces within a single day, leveraging the existing rail infrastructure to support cultural tourism and provide access to Thailand’s unique heritage sites.