阿里
所有级别的政府都面临前所未有的预算赤字，这已不是什么秘密。尽管州和市政收入正在下降，但基础设施的需求正在增长，可持续性的问题正处于中心阶段。我们可以负担得起这些基础设施资产和美国全部四百万英里的铺装道路吗？我每天都与沥青一起工作，从长期的经验中，我可以告诉您有一些好的答案。
2006年，州际公路系统成立50周年，强调了近年来道路状况与该系统开幕时的状况之间的对比。该系统建于1960年代，是一项成功建造了美国公路骨干线的事业，以及其他因素，它推动了该国作为世界领导者的地位。
With 42,795 miles of primary highway network, the system was “capable of taking us to every corner of the United States” on highways that “are the safest in the country by a factor of two,” according to Dan McNichol’s “The Roads That Built America” (2003).
1990年代和2000年代初期的强劲经济没有激励效率和节省我们的道路网络的成本。没有任何经济压力，高速公路机构对自己的习惯方式感到满意，并且缺乏动力，可以在框框开箱即用，并以更少的速度要求。简而言之，在我们的道路上，美好的时光带来了比学科和效率低下的资产管理方法。
这种思维方式正在改变。金融障碍强调了将道路视为有效管理的资产的重要性。
Fifty-plus years after the system’s creation, we are confronted with a road maintenance problem as big as the system itself. The status quo is not sustainable, and state departments of transportation need cost-effective solutions or face going back to the transportation Stone Age and possible extinction.
There are answers. In Michigan, at least 38 counties have converted some asphalt roads to gravel. Counties in Alabama and Pennsylvania have begun downgrading asphalt roads to cheaper chip-seal roads. Some counties in Ohio are simply letting roads erode to gravel.
New Pavement Rehab Paradigm
对于某些道路，回收沥青可能是更好的选择。
Nevada’s Dept. of Transportation has saved $700 million so far in pavement recycling projects. Studies have shown for many years that pavement recycling is cost-effective, saving up to 50% of rehab cost.
Florida’s Dept. of Transportation compared hot-in-place pavement recycling to conventional milling and resurfacing on its state Road 471. The comparison looked at the cost of resurfacing versus recycling and assumed 18 years of service life for milling and resurfacing and 14 years of life for recycling. The annualized cost of resurfacing was 61¢ per sq yd per year in 2002 dollars, while the annualized cost of recycling was 40¢ per sq yd per year in 2002 dollars, or a 35% savings. If FDOT spends $300 million on pavement resurfacing annually, the savings can reach $100 million a year. And that’s not counting economies of scale.
If pavement recycling becomes mainstream, more contractors will enter the field and the price will fall, perhaps saving, for instance, Floridians another $150 million a year. Once barriers are lifted and technical challenges met, the rewards will be great.
An example of what this can mean is provided by the recent $10-million, hot-in-place asphalt recycling project involving 14 miles of State Road 700 near Canal Point, Fla. My company had a key subcontract on that project and the benefits of asphalt recycling included $700,000 in savings, eliminating 24,000 tons of asphalt millings and the need to mine 24,000 tons of new materials. Florida also saved the cost of 300,000 gallons of asphalt cement, which would have had to be trucked to and from the work zone. And all this was accomplished while meeting mix-gradation and surface requirements.
高速公路机构，开发人员和房主协会将明智地为其路面浏览器工具套件增加回收利用。
