Abstract
The urbanization and development in the Kingdom of Saudi Arabia is basically grounded on the construction of modern highways network through higher mountains, such as Werka descent road, which is currently suffering from frequent rockfalls and landslides during rainy seasons. The rock masses along the road were classified using the RMR and GSI classification systems. The integrated techniques, such as graphical method, modeling, and simulation are proposed to assess rock slopes condition and rockfalls using DIPS and RocFall programs respectively, to recommend the remedial measures for the natural and man-made slope cuts against failures and rockfalls. The main outcome is to increases the safety levels and to reduce geohazards along Werka descent mountainous road. Intensity of rainfall, joints sets attitudes with the slope face attitude, Jv, block size, specific gravity, coefficients of restitution and the slope geometry are the main factors in rock slope failure and rockfalls.