Overview
- A landslide on Thursday, July 30, dumped mud, trees and large boulders on RN40 at kilometer 2208.7, about three kilometres from San Martín de los Andes, forcing an immediate full closure.
- Vialidad Nacional joined municipal, provincial and park teams to deploy graders, loaders, an excavator and trucks to clear the road and to build a temporary emergency shoulder.
- Engineers found cracks on the slope above the slide and teams from Parque Nacional Lanín and emergency services are keeping the area under constant geotechnical monitoring due to the risk of new falls.
- Traffic has moved from a full shutdown to assisted, time‑limited openings — for example Friday evening between 17:00–22:00 and weekend hours of 08:00–22:00 — with police escorts and strict safety rules.
- The closure affects a key tourist and freight corridor between San Martín de los Andes and Villa La Angostura, so authorities require daytime travel, chains for heavy vehicles and consultation of official channels before driving.