The study area is lithologically weak comprising weathered and jointed sandstone. Pore water pressure developed due to seepage of water along the weak planes within the rock mass during incessant rainfall leading of slope failure
Chasie M. &  Theophilus P.K., 2017: Updation of existing landslide inventory of North Eastern region based on the new incidences as and when occurs during the period, Unpubl. GSI progress report for FS 2016-71
Mitigation should be implemented at the earliest as the area is an arterial route from lower Haflong to Gunjung. Besides in the affected area it is observed that along the road creep like nature is observed within a stretch of 150 m.
Haflong-Gunjung road section slide-10
Lower Haflong
1. Construction of drainage ditches (lined hillside drain) along the road (which is at crown portion of the slide) so that water does not flow towards the affected slope. 
2. The slope lower to the road in the valley side should be investigated.
Due to incessant rainfall, water penetrated along the weak planes of weathered sandstone beds thus causing failure