On the morning of November 12, Road Management Area III under the Vietnam Road Administration reported landslides along the expressway, with debris blocking sections of the carriageway.
Between km 1287+750 and km 1287+850, near the Suoi Da overpass in O Loan Commune, soil from a roadside slope covered the road to a depth of 30 centimetres.
A more serious landslide occurred between km 1288+170 and km 1288+240, where soil deposits reached depths of 0.3-1.3 metres. Lane 1 was covered by more than 30 centimetres of soil, making it impassable to vehicles.
Road maintenance crews and local authorities immediately diverted traffic, directing southbound vehicles onto National Highway 1.
Workers and machinery were deployed to clear debris, stabilise the affected areas and restore safe traffic conditions.
Road Management Area III said Lane 1 in the north-south direction had since reopened.
Intense rain has also increased the risk of landslides across eastern Dak Lak Province.
According to the provincial meteorological agency, soil moisture in several areas has exceeded 80 per cent, with some locations reaching saturation, raising the risk of further landslides if downpours continues.
On the evening of November 11, the agency issued an emergency flood warning for the Ky Lo River as water levels rose rapidly.
On the Co River, water levels at Da Loc station approached 27 metres, exceeding the first warning level by 0.8 metres.
On the Ky Lo River, water levels reached 9.74 metres at Ha Bang Station, 0.24 metres above the third warning level, while Xuan Quang station recorded nearly 28 metres, exceeding the first warning level by 0.95 metres.
Floodwaters on the Ky Lo River are forecast to continue rising over the next 24 hours before peaking and gradually receding.
The flood disaster risk has been classified at Level 2.