Thailand's Longest Railway Tunnel Completed in Ngao
The 6.2-kilometer Ngao Tunnel has been successfully bored, marking a major milestone for the Den Chai–Chiang Rai–Chiang Khong railway project.
According to Prachachat Business, Minister Phiphat Ratchakitprakarn has officially overseen the breakthrough of the Ngao Tunnel, which now stands as the longest railway tunnel in Thailand at 6.2 kilometers. This engineering achievement is a critical component of the new double-track railway line connecting Den Chai, Chiang Rai, and Chiang Khong. The project is designed to link four northern provinces and establish a vital trade gateway between Thailand, Laos, and the broader region. For residents and travelers, this infrastructure development represents a significant step toward enhancing connectivity across Northern Thailand, potentially streamlining logistics and future passenger travel from the north to the south. While the breakthrough is a major construction milestone, the full operational timeline for the entire railway network remains to be confirmed, with reports indicating a target opening around 2028. This project is expected to serve as a backbone for regional economic integration, though further updates regarding specific station facilities and service schedules are still pending.
