ABSTRACT
This report aims at evaluation and study the critical behavior of rockfall situated along the roads in the mountainous region. There are approximately ten traffic accidents caused by rockfall in Kochi prefecture every year. Three of them are fatal accidents resulting in death of the drivers and passengers. A field analysis is carried out by studying the geology and tracing the path of rockfall. The motion of rockfall is analyzed based on the data gathered in the field as well as from experiments. The obtained results from the field studies and experiments are compared and the effects of trees on the rockfall motion are evaluated and discussed.
