In order to meet the diverse needs of pavement engineering for green, durability and functional improvement, in recent years, the application of polyurethane mixture in pavement engineering has received extensive attention. Through investigating the current research status of polyurethane mixture, this paper focuses on summarizing the research result in the field of water stability, while presenting the problems of current research and proposing feasible research directions. The results show that: polyurethane has greatly improved the road performance of asphalt mixtures. The water stability of polyurethane mixture is generally poor, but there is still lack of research on water damage mechanism of polyurethane mixture. The lack of water stability is the key problem restricting the application of polyurethane mixture.

Low-noise pavement can efficiently reduce the tire-road noise and improve the driving experience of passengers and life quality of residents along the line. Porous elastic road surface (PERS) is a type of low-noise pavement with excellent performance. This study summarizes the research status and analyzes the development trend of PERS. The research results show that PERS has a large elastic deformation capacity and a large porosity, thereby achieving elastic vibration damping and porous sound absorption. The effect is an effective way to fundamentally solve the current traffic noise problem. However, the lack of relevant research in the design theory of composite material composition, noise reduction function evaluation test method, and index system is a major factor that restricts the breakthrough of PERS in technical difficulties and the achievement of large scale engineering applications.

The related research and application status of potential energy technologies for road at home and abroad were comprehensively investigated and systematically analyzed in this study to provide theoretical guidance and technical support for the development and utilization of road potential energy sources. The applicability of different types of power generation technologies, such as photovoltaic power generation, piezoelectric power generation pavement, and road speed reducer power generation equipment, was analyzed, and the development direction for future research of road energy was proposed in this paper.