Three large rocks and soil fell from a roadside slope onto National Highway 20 in Xuan Huong-Dalat Ward at around 4.30 pm on September 19.
Drivers approaching the site stopped in time to avoid the debris, and no injuries or property damage were reported.
Local authorities and other agencies were deployed to regulate traffic and clear the debris. Vehicles were later able to pass through the area safely.
The nearly 10-kilometre Prenn Pass is a major southern gateway to Dalat and carries heavy traffic. Several landslides were reported along the route in late 2025, prompting work to stabilise slopes and reduce the risk of further rockfalls.