Sandhyavitri, Ari2018-09-042018-09-042018-09-04wahyu sari yenihttps://repository.unri.ac.id/handle/123456789/9402Inevitably, rockfall and slope failures are continuing occur within cutting slope areas adjacen to road way. This study concerned in investigation of rockfall zones along motorway connecting Provinces of Riau and West Sumatra via Kiliran Jao (246 km). This study utilized California Rockfall Hazard Rating System (CHRS) parameters as a tool to identification of slope hazards. It was identified 66 slopes, of which 10 slopes are considered as risky slopes. Based on the risk cost calculation it was also revealed that 10 slopes were in need to stabilize. The CHRS method put the riskiest slopes as priority to stabilize, but risk cost method considered the lowest risk cost slope to stabilize as a priority. The most preference slope stabilization techniques are slope screening, gabion, and drainage for risky slope at KM 136 and 215.5. The preference one for slope at KM 246 was scalling, retaining wall and drainageenrockfallhazardsrisk coststabilize techniquespriorityArticle