Contractor Repairs Samsen Road Sinkhole, Traffic Restored
A section of Samsen Road in Bangkok's Dusit district collapsed into a 1.5-meter-deep sinkhole on November 9, caused by an unsealed abandoned water pipe linked to the Purple Line rail construction. The contractor had already closed the road to traffic, preventing injuries. Repair crews worked overnight to seal the leak, fill the hole, and restore the road surface, reopening the route to traffic by 5:05 AM the following morning.
The cause of the Samsen Road collapse has been identified, and the contractor has completed repairs, bringing in machinery to fill the hole and level the area, restoring normal traffic flow.
On November 10, 2026, the Dusit District Office reported progress on the road subsidence on Samsen Road in Dusit District, which occurred at 3:28 PM on November 9. The road surface collapsed into a 1.5-meter-deep hole with a 4-meter radius. Officials worked through the night until 5:05 AM to restore the road for public use.
The area is part of the Purple Line electric train construction project, Tao Poon–Rat Burana section, where the Department of Public Works and Town and Country Planning handed over the site to the construction contractor.
Before the incident, the contractor had already blocked off the area to traffic, so no injuries were reported.
After the collapse, the Dusit District Office coordinated with the Metropolitan Waterworks Authority and Bang Pho Fire and Rescue Station to inspect and repair the site, while warning the public to avoid the area temporarily for safety and to prevent further accidents.
At 5:48 PM, lighting equipment was installed to support overnight work, and at 6:15 PM, Bangkok Governor Chadchart Sittipunt and Deputy Governor Wisanu Thraphasompon visited the scene to monitor the situation and coordinate a quick fix.
By 10:30 PM, investigations revealed the collapse was caused by an abandoned water pipe related to construction that had not been sealed, allowing water to erode the soil beneath the road.
After identifying the cause, the contractor promptly sealed the leak and then brought in machinery to fill the hole and restore the road surface throughout the night.
