Road noise pollution is a source of growing frustration for many, but it isn’t just roaring engines – it’s also the sound of the vehicles rolling over the road.
道路噪音污染是许多人越来越沮丧的来源，但它不仅仅是轰鸣的引擎。这也是车辆在道路上滚动的声音。
Low-noise road surfaces are a cost-effective solution; they are better than noise screens or insulation at reducing the level of sleep disturbance and stress impacting people living in heavy traffic areas.
低噪音路面是一种成本效益高的解决方案；它们比隔音屏或绝缘层更好地降低睡眠干扰和压力对交通繁忙地区的人们的影响。
Low-noise roads can be made in several different ways, and road construction workers will select the most suitable method after considering the needs of the local area and budget. Some roads will use a base of small aggregate (chunks or grains of crushed rock) to minimise the vibration of tyres driving along the surface, which can be made even quieter when made of porous material as air pockets also provide some insulation.
低噪音的道路可以用不同的方式修建，道路建筑工人在考虑了当地地区和预算的需要后，会选择最适合的方法。一些道路将使用小集料（块或碎石）的基础，以最大限度地减少轮胎在路面上行驶时的震动，当用多孔材料制成时，可以使其更加安静，因为气穴也提供了一定的隔热作用。
Some noise-reducing roads will use larger, coarser aggregate that is laid with deliberate gaps to absorb sound. Other options include two-layer porous asphalt, which consists of a thin, small-aggregate top layer and a thick, course-aggregate bottom layer. This method is usually reserved for high-speed roads.
一些减少噪音的道路将使用更大、更粗的集料，这些集料是通过故意设置的间隙来吸收声音的。其他选择包括两层多孔沥青，这是一个薄的，小集料顶层层和一层厚厚的，课程集料底部层。这种方法通常用于高速路。
