Late Wednesday night, when the incident occurred, a Phuong Trang passenger bus was driving through when its front wheel sank into the edge of the hole, leaving the vehicle teetering right above the ravine.
At the location of the landslide, warning signs had appeared two days earlier. Authorities had reinforced the area with steel piles, but they failed to hold the ground.
The landslide dragged many pine trees along the upper edge of the road toward the ravine. By Thursday morning, several other nearby trees had been cut down.
Workers are repairing telecommunications cables affected by the incident.
On the morning of Nov. 20, the Lam Dong Provincial People’s Committee declared an emergency situation due to natural disaster at two severe landslide points on National Highway 20: Mimosa Pass and Prenn Pass.
The province ordered emergency response measures, including installing warning signs, blocking off dangerous areas, relocating residents, and monitoring ground movement, while also rerouting traffic, identifying the cause, and proposing solutions.
Mimosa Pass is 11 km long on National Highway 20. It forms the southern gateway to Da Lat along with Prenn Pass and Sacom.
In recent days, several routes around Da Lat have suffered repeated landslides: Prenn Pass near Datanla Waterfall has eroded, National Highway 20 near the D’ran suspension bridge has sunk and cracked, and Ngoan Muc and Khanh Le passes have also slid, making travel between Nha Trang and Da Lat difficult. Vehicles can currently detour through Ta Nung Pass (Provincial Road 725), but the route adds 30–35 km.
