Denoting the immense increase in waste plastic production and the global vision for environmental protection and less use of natural resources, it is necessary to manage plastic waste in order to achieve the purposes. Over the past few decades, the unique properties of recycled plastics have led to an increase in the rate of using these materials in the industry, which vast numbers allocated to PETs among other waste plastics. Therefore, the use of these plastic materials in the road construction industry can be described as an appropriate and cost-effective option for achieving previously mentioned goals. Also, due to extensive research on the use of PET in concrete pavements and asphalt concrete pavements, and in order to provide a comprehensive view, this paper tries to investigate the effects of using PET on fresh and hardened concrete as well as the characteristics of asphalt. In the present paper, the reported statistics for waste plastic, recycling process and effects on concrete and asphalt concrete pavements has been discussed. Generally, the results of using recycled PET with different shapes and sizes have shown reduction in specific gravity and deterioration of mechanical properties of concrete and improving rutting resistance, as well as improving the fatigue life of asphalt concrete pavement