The purpose of this research is to examine the performance of unpaved roads that have been reinforced with natural reinforcement materials. In this experimental study, a natural geocomposite material was used and prepared from bitumen-coated bamboo grids and jute geotextile. The single-layer natural composite was placed at the interface between the base and subgrade by varying the subgrade thickness. The California bearing ratio tests were conducted to assess the performance of reinforced base-subgrade soil system. Using the results of California bearing ratio tests, an attempt was made to determine the optimum depth of the reinforcement layer. Recycled concrete aggregate was selected as the granular subbase layer and kaolin clay as the subgrade layer. The Modified CBR mold was used to conduct the tests. From the test results, it is found that the bitumen-coated natural geocomposite reinforcement positioned at base course H = 130 mm provides the maximum benefit. When reinforcements are positioned at a subgrade thickness of 100 mm, their maximal impact is achieved. The results demonstrate a remarkable rise in the soil's California bearing ratio value. It has been noted that the bitumen-coated natural geo-composite performs better for reinforcement than the bitumen-coated jute geo-textile and bitumen-coated bamboo grid utilised in this study.