The high-speed rail project connecting Bangkok to Chiang Mai has been put on hold as the government prioritizes the completion of the Bangkok-Nong Khai line. Deputy Prime Minister and Minister of Transport Suriya Juangroongruangkit stated that the focus is now on expediting the 714-kilometer Thai-Chinese high-speed rail link from Bangkok to Nong Khai. This line is expected to be the first operational high-speed rail service in Thailand, connecting the country with Laos and China.
The Bangkok-Chiang Mai line, particularly the first phase between Bangkok and Phitsanulok, was initially slated to cover 380 kilometers. Despite its inclusion in the country’s rail master plan, there has been no recent progress on this project. A study by Japanese agencies, including the Japan International Cooperation Agency (JICA), has shown an economic return rate of 17.3%, surpassing the 12% threshold. However, the project remains in the planning phase, awaiting further consideration.


The Bangkok-Phitsanulok section is scheduled for development between 2028 and 2032, with environmental approvals dating back to 2017. The second phase, covering 288 kilometers from Phitsanulok to Chiang Mai, is part of a long-term plan for 2033-2042. While the EIA for the second phase has expired, the Ministry of Transport is seeking funding to review and update the environmental assessment.
The Bangkok-Phitsanulok line is projected to serve 10,900 passengers daily upon completion, with fares averaging 764 baht for the full route. Using Japan’s Shinkansen technology, the high-speed train would travel at 300 km/h across 12 stations, covering a total distance of 688 kilometers.
The ministry’s immediate priority remains the Bangkok-Nong Khai line, with other routes like the Bangkok-Chiang Mai line to be considered in the future. Suriya has called for expedited work on the Northeastern line to ensure it opens for service as soon as possible.