Abstract:
Highway embankments and slopes are critical supporting transportation systems to function effectively. Investigation of rockfall hazards (as well as managing highway embankments and slopes) are crucial reducing risk hazards impose to highway users to red. The research aims to identify highway slopes prone to rockfall, based on the Rockfall Hazard Rating System (RHRS) on the highway sections Pekanbaru (Riau) - Taluk Kuantan (Riau) – Kiliran Jao (Riau) –Dharmasraya (Sumatera Barat), Muaro Bungo (Sumatera Barat) - Sarolangun (Jambi) – Lubuk Linggau (Jambi) – Lahat (Sumatera Selatan) (837 km).
It was identified, 109 slopes prone to rockfal. Of which 15 slopes were classified as potentially rockfall hazard ones. There were three the highest score of RHRS slopes are as follow; RHRS of 475 (Slope at KM 609.2), RHRS 451 (at KM 136), RHRS 413 (KM 215.5) respectively. Various factors determine the hazard scores are as follow; slope heights, ditches, highway wide, average vehicle risks (AVR), block sizes, and rockfall history. The investigation may assist decision makers to develop strategy in managing highways and slopes within Sumatra Island enhancing transportation safety for road users
