The Ranong provincial administration has continued its closure of the main road linking its provincial seat and Chumphon following two landslides.
The road remained unsafe on Saturday morning, as the mountain soil above the location of a recent repeated landslide is saturated with rainwater and could slide down, said Ranong Governor Jatupoj Piyumputra.
The viewpoint area near the Pulyabal Waterfall about four kilometres from the Ranong downtown saw the first landslide on Tuesday.
A second landslide at the same spot occurred on Friday.
On Saturday, officials used a drone to survey the mountain soil at the same spot and could see that it was saturated and vulnerable to yet more sliding.
Motorists were told to use a bypass from Ban Hin Chang to Tha Rua and then on to Ban Khao Nang Hong until further notice.