ABSTRACT

Landslides are common along highways constructed through mountain terrain. Hazard and Risk maps derived from geotechnical and risk analysis, and they can be used as a tool for planning and maintenance of highway slopes. They are quantifying the risk of landslides and then used for cost effective planning and management programs. To produce hazard and risk maps, first the important factors contributing to slope instability are identified, and each factor is rated, and the summation of these weighted factors will give total hazard values. Finally the hazard values converted to risk values. Risk values can be calculated by multiplying the probability of instability (hazard) by the consequence of failure. This paper discusses the factors required and steps involved to produce Hazard and Risk maps and their application to cost effective, planning and management of remedial works for highway slopes.