Home / WorldWorldBangkok PostWorldBangkok Post·Sep 19, 2026·1 min readDRT tightens watch on longest rail tunnelThe Department of Rail Transport (DRT) has stepped up inspections of the Den Chai–Chiang Rai–Chiang Khong line, now 70.6% complete, as work continues on Thailand's longest rail tunnel.View original source — Bangkok Post ↗ShareCopy linkShare on XShare on FacebookRelated storiesWorldTimes of IndiaWorldSep 14, 2026 · 1 minChar Dham rail boost: Rishikesh-Karnprayag line hits 41 tunnel breakthroughsTimes of IndiaPoliticsBangkok PostPoliticsSep 1, 2026 · 1 minCabinet approves double-track rail expansionBangkok PostWorldCNAWorldSep 12, 2026 · 1 minTunnelling under major roads and MRT lines: North-South Corridor construction enters 'most challenging phase'CNAWorldIndian ExpressWorldJun 9, 2026 · 1 minZojila tunnel breakthrough: India’s longest road tunnel inches closer to completionIndian Express
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