
In Lam Dong province, the three passes Mimosa, Prenn and D'Ran on National Highway 20 are the most complex landslide spots, with many sections of the road surface cracked and unstable negative and positive slopes. Especially in the D'Ran area, where the volume of rock and soil collapsed by more than 64,000 m3, causing severe damage to the road surface structure.
According to the assessment of the Vietnam Road Administration, the repair work in the D'Ran area will face many difficulties due to the large volume of earth and rock and the complex construction location.
Road Management Area IV proposed to add more construction teams, mobilize more dump trucks to transport soil and rock, and increase machinery and equipment, and affirmed its readiness to support steel cages and spare materials from the Area's warehouse when requested by the locality. Lam Dong Department of Construction committed to mobilizing maximum forces to open one-way traffic before November 30.
Currently, the Road Management Office IV.1 and Road Technical Center 4 are assigned to be on-site, coordinating with the Department of Construction to continuously handle any arising issues and ensure construction progress. This will speed up decision-making, propose solutions to promptly resolve technical problems and ensure resources are mobilized at the right time and place.
At Prenn Pass, the cause of damage is assessed to be due to long-term rainwater seeping in, causing the positive slope soil to expand, creating pressure to push the road surface.
Director of Road Management Area IV Nguyen Van Thanh has requested units to review the entire drainage system, proactively open drainage ditches and have appropriate solutions to handle the slope. The locality is committed to basically repairing the road before November 28 to open one-way traffic. As for the section adjacent to the cracked retaining wall, a specialized technical solution has been proposed with a deadline of completion before the Lunar New Year.
At Mimosa Pass, Project Management Board 85 has mobilized equipment to widen the slope, compact the road, and lay hot concrete to form a temporary road, aiming to open it to traffic before November 28.
Vietnam Road Administration stated that, with the complicated weather conditions and high risk of landslides, repairing the severed national highways continues to be an urgent task. Especially at the Mimosa Pass, Prenn Pass and D'Ran Pass on National Highway 20, which are strategic connecting routes between the South Central Coast and the Central Highlands, the urgent reopening of the route is very important for national defense and security, freight transport, people's travel and rescue work.
Meanwhile, in Khanh Hoa province, a landslide occurred on 2/3 of the National Highway 27C road surface at Km36+700.
The working group of Road Management Area III identified the cause of landslides, analyzed the danger level of each location and proposed appropriate technical solutions. In particular, at locations with large volumes of rocks, the working group and local authorities agreed on controlled blasting measures with the support of Military Region 5, to speed up the clearance process.
At the same time, Road Management Area III requires road management units, maintenance contractors and BOT enterprises to be on duty 24/7, ready to respond to new situations, and promptly reinforce temporarily, handle road surface erosion and protect infrastructure. The goal is to open to traffic before December 1 while still ensuring absolute safety for people and vehicles.
To ensure safe traffic for people and vehicles on key national highways, the Vietnam Road Administration has assigned leaders and officers of the Traffic Management and Organization Department to closely monitor the scene in key areas, coordinate with local authorities to remove difficulties, handle arising situations and overcome damages.
Source: https://baotintuc.vn/kinh-te/kich-hoat-ung-pho-khan-cap-de-thong-xe-quoc-lo-20-quoc-lo-27c-cuoi-thang-11-20251125113626937.htm






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