Abstract
This paper proposes a methodology related to risk management of slopes closed to highway. The basic concept of this method is that by adopting an event tree, the occurrence of hazard is clearly associated with the corresponding damage scenarios. And, risk due to natural hazard is evaluated as monetary value from socio-economical viewpoints considering repair cost, compensation, the financial losses due to the interruption of highway service and so on. The result shows that the proposed methodology is very effective to establish rational risk mitigation strategv considering cost-benefit effect.
