在交通发达的欧美国家 ,近几年来一些城市修建了许多低噪声环保道路 ,机动车在这种道路上行驶时几乎听不到噪声 ,较好地解决了以往道路噪声给市民带来的诸多生活之苦。长期以来 ,道路噪声一直是世界各国的一大城市公害 ,严重危害着市民身体健康。各国政府采取了许多措施 ,如机? In the developed European and American countries, in recent years, many cities have constructed many low-noise and environmentally friendly roads. Motor vehicles can hardly hear noise while driving on such roads and can well solve many problems brought by road noise to citizens in the past Bitter. For a long time, road noise has always been a major city pollution in various countries in the world, seriously endangering the health of citizens. Governments have taken many measures, such as machine?