当前世界各国城市发展呈现（空间扩张）规模化、（资源与经济活动）聚集化、以及（人口）高密度化的特征，城市道路作为物质、信息交换的载体在城市运营过程中发挥着越来越重要的保障作用。然而，随着路网密度的不断加大，城市道路运营过程对周边环境、资源与生物的影响日益加剧。主要表现在：机动车运行噪声影响沿线居民生活质量，形成噪声污染；道路本身高吸热效应加剧了城市热岛效应，造成热污染；机动车尾气排放造成路域空气污染等。如何消减上述污染，降低后续处置增加的碳排放，提高资源利用效率，是当今城市化可持续发展进程中迫切解决的难题。

钱国平教授带领团队金娇、于华南、龚湘兵、蔡军、周洪宇、马跃潭、徐鹏、李希、赵为天、吴佳东等老师，联合交通运输部18luck新利在线娱乐网 院等多家单位，基于可持续发展理念，结合交通发展和环境保护共性需求，开展城市道路声-热-气环境改善技术及应用示范研究。

团队深入贯彻落实“交通强国”、“一带一路”等国家战略以及新发展理念，经过20多年的攻关，取得了丰硕的成果，显著推进了行业科技进步，并为路域环境保护提供中国范式。

Advanced Technologies and Demenstration for Improving Urban Road Noise-Heat-Air Environment

The spatial expansion, resources agglomeration and economy activities, as well as high population density are the main characteristics for urban development. As carriers of material and information exchange, urban roads play an increasingly important role in urban operations. However, with the increasing mileage and road network density, the environmental, resource, and ecological impacts of road construction and operation are escalating. The main manifestations are: the vehicle noise affects the life qualities of residents along roadways, resulting in noise pollution, the road absorbs the sunlight and exaggerates the urban heat island effect, leading to heat radiation, while vehicle emission causes air pollution in road area. Hence, solving the above pollution, reducing increased carbon emissions from subsequent disposal, and increasing resource utilization efficiency are urgent challenges in global sustainable development.

In order to integrate 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) Investigated the sound propagation and energy dissipation mechanisms of tire-road interactions under the coupling effects of multiple environmental media and developed a broadband sound absorption and targeted energy dissipation technology for comprehensive roadside noise reduction, resulting in integrated mitigation strategies for different noise control requirements. (2) Developed a heat-insulating and cooling functional layer for asphalt road surfaces and its combined design methods, revealing the composite system/interface properties, 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 thermal effects of the road surface temperature field and achieved comprehensive temperature control of road surfaces. (3) Established a comprehensive treatment technology for vehicle emission by using adsorption-degradation coordination and solved multi-source pollution problems for road near-surface, achieving the efficient and comprehensive treatment for emissions under complex urban road application scenarios.

The results of the project have been successfully applied in more than 30 highways and urban road projects in ecological environment restoration areas and environmental protection areas in many countries, providing a typical paradigm for the development of green and low-carbon highways around the world. The project has authorized 56 invention patents, 20utility model patents, 13 software copyrights and edited 10 various standards .

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

Figure 1 Low Noise Pavement

Figure 2   Cooling Pavement

Figure 3   Green Functional Pavement