道路交通设施建设与运行过程中伴随的路域水体污染、车辆尾气、路表油污及近地表高温等问题带来的工程与环境、工程与人的影响日益凸显，成为世界各国亟待解决的重大技术难题。严重影响了路域水体、空气、生态环境以及道路服役寿命，每年带来巨大的经济损失。

经过20余年的科研攻关，钱国平教授带领团队金娇、于华南、龚湘兵、蔡军、李希、徐鹏、马跃潭、周洪宇等老师，联合交通运输部科学研究院等多家单位，针对路域水体、尾气、路表油污等条件共同作用下的路域生态环境及路表高温带来的病害问题，取得了一系列重要突破。

团队经过20多年的攻关，取得了丰硕的成果：主编国家军用标准1部、行业技术标准7部、地方技术标准2部。研究成果在20余条高速公路及多地市政道路应用，直接经济效益达16亿元，并贯彻落实“交通强国”、“一带一路”等国家战略以及新发展理念。显著推进了行业科技进步，提高了我国路域环境保护科技水平。

Advanced Technologies and Application for Improving Road Operation Environment

With the increasing mileage and density of highways, the impact of highway construction and operation on the environment, resources, and organisms is increasing. The main manifestations are: pavement runoff brings heavy metals, organic pollutants and other water pollution into the surrounding water system, automobile exhaust caused air pollution, the road absorbs the sunlight increased the urban heat island effect. Thus, how to decrease the above pollution, reduce the carbon emission increased by subsequent disposal, and enhance resource utilization efficiency is an urgent problem in global sustainable development.

In order to integrating the common needs of transportation development and environmental protection, the project team has conducted research on the low-carbon design and application technology of functional pavement materials since 2008 with funding of major scientific research projects and key engineering projects.

(1) This project developed a series of technologies for road/bridge runoff collection, purification/pollution treatment, and comprehensive utilization, integrated treatment of different pollution sources, solved the problem of dispersed treatment of near-surface multi-source pollution by traditional technology, and achieved efficient treatment and recycling of road area water under complex application scenarios. (2) Developed functional layers for degrading near-surface exhaust gases and oil pollution in the road area, as well as techniques for determining their effectiveness, solved the problem that traditional technology cannot simulate the actual environmental conditions, and achieved simultaneous high-precision real-time measurement. (3) Developed a heat-insulating and cooling functional layer for asphalt road surfaces and its combined design methods developed, which revealed the composite system/interface properties and energy transfer and conversion mechanisms of asphalt mixtures; and invented a temperature-adjusting functional road surface design method and effect detection technology, which effectively alleviated the thermal effects of the road surface temperature field, and achieved comprehensive temperature control of the road surface. (4) Developed a comprehensive environmental regulation and evaluation technology system for near-surface water bodies and the atmosphere in the road area, which realized the classification and evaluation of near-surface water bodies and the atmospheric environment in the road area quantitatively and scientifically, and guaranteed the controllable stability of the road ecosystem health level.

The results of the project have been successfully applied in more than 20 highways and urban road projects in ecological environment restoration areas and environmental protection areas in many countries, which reduce construction costs by more than 15% compared with traditional technologies, and generated direct economic benefits of more than CNY 1.61 billion. It providing a typical paradigm for the development of green and low-carbon highways around the world, and authorizing 60 patents for invention, 13 software copyrights, and the chief editorship of 10 various standards.

The research result of this project significant improved the road environment along the route, extended the service life of the highway, significantly reduced carbon emissions, realized efficient use of resources, it provided theoretical and technological support for international green and sustainable development.

Figure 1 Water Projection

Figure 2 Cooling Pavement

Figure 3 Green Degradation