此外,它们在多风的时候效果并不好,更何况在城市街道边安装也不大现实。幸运的是,我们还有其他选择。
By adding rubber crumbs, reclaimed from shredded tyres, to the bitumen and crushedstone used to make asphalt, engineers are designing quieter streets.
在沥青和碎石里添加从轮胎碎片中回收的废胶末,再铺成柏油路,这样工程师可以设计出更加安静的街道。
First used experimentally in the 1960s, this rubberised, softer asphalt cuts traffic noise byaround 25%.
第一条试验性道路出现在20世纪60年代,这种加入橡胶而变得更柔软的柏油路可以减少约25%的噪音,
Even better, it also lasts longer than the normal sort.
更棒的是它的寿命比普通路面更加持久。
Not surprisingly, rubberised asphalt is catching on.
参入橡胶的柏油路渐渐变得流行起来,
Enough tyres are recycled in America each year to produce 20,000 lane-miles of the stuff,enough to re-pave about 0.5% of America s roads, according to Liberty Tyre Recycling, aPittsburgh firm that handles around a third of America s recycled tyres.
这并不奇怪,根据自由轮胎回收公司的说法,美国每年回收的轮胎足够修建2万英里的橡胶柏油路,足够重新铺设美国0.5%的公路。
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