美国已通过立法来推动废旧轮胎的再利用。早在 1991年 ,美国就出台了关于回收和用废旧轮胎法律 ,自 1994年起 ,美国有关条例规定 ,靠国家资助铺设的沥青公路 ,其中必须使用含有 5 %用旧轮胎磨碎的橡胶颗粒。据调查 ,到 2 0 0 0年 ,美国铺成的橡胶改性沥青公路已达 1.2 8万km。 The United States has passed legislation to promote the reuse of discarded tires. As early as 1991, the United States issued an asphalt road recycling and scrap tires laws. Since 1994, U.S. regulations have laid down state-funded asphalt roads, of which 5% of the rubber particles ground with used tires must be used. According to the survey, by the year 2000, the number of paved rubber-modified asphalt roads in the United States has reached 120,800 km.