This paper aim to study various properties, parameter of RAP (Reclaimed Asphalt Pavement) and use it in construction of flexible pavement. RAP mainly constituted with scrap material received from flexible pavement due to increment of granular sub base and base course as per latest IRC code. In this the scrap material is recycled as RAP so the construction cost will considerably decrease. This RAP may be used as sub base course or base course with cold in place recycling method or reclaimed with additional binder or aggregates and use in base course as bituminous layer. This will also help to save valuable natural resource in huge quantity. This paper also contains a case study of RAP and analysis of direct saving of construction cost.