The development of transportation is crucial factor for the development of the nation. In India, tremendous growth marked in urbanization and population in last few decades which plays a major role in road construction. As a result, to provide wide connectivity via road network with the growing population, road construction is being done on almost all types of soils. At present, it has become a necessity to construct pavements even on loose soil or expansive soil, for making roads on a large scale. However, these loose and expansive soils can be modified by using natural resources which makes the soil more durable, increases the strength of the soil, makes the process more environment friendly, and also reduces the overall cost of construction. Among all the natural resources, presently coir fibre is becoming more popular as a reinforced material because of its easy availability, good wearing resistance, and longer durability. India is the largest producer of coir which is a versatile natural fibre extracted from the husk of coconut fruit in an abundant quantity. As flexible pavements are mostly preferred in India so, in this paper, an attempt has been made to study the improvement in the performance of soil subgrade and bituminous mix by the addition of coir fibre along with other natural fibres. This literature determines how unconfined compressive strength, California bearing ratio value, and other engineering properties at maximum dry density and the optimum moisture content gets improved by the coir fibre addition in subgrade soil on varying fibre content, fibre length, and height of application of fibre in subgrade layer. The paper also summarizes the change in stability, flow and volumetric properties of coir fibre reinforced bituminous mix by varying the binder content, fibre content, and fibre length. The enhanced effect in the properties of coir admixed subgrade and bituminous mix can be observed when various agents like bitumen, sodium hydroxide, carbon tetrachloride, etc. were used. It was concluded that 0.5–1% of CF required for stabilizing subgrade soil whereas, 0.2–0.5% CF is suitable for reinforcing the bituminous mix. The study confers the cumulative summary of the research outcomes in the area of road construction by using coir fibre.