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It's work, it's science, it's engineering. But among these, and other qualities, paving is also something that requires the people behind the operation to have an artist's touch with machinery, mixes and measurements.
Our annual (since 1979) inventory of America's bridges. We survey engineers from every state and Washington, D.C., with both quantitative and qualitative questions. The result is rich, up-to-the-minute data and a candid conservation with men and women vital to America's bridges now and tomorrow. And this year there is a little good news.
Now you can choose from several options - and find one that fits best - to evaluate and rate the "green-ness" of a pavement, to certify its sustainability. Unlike the nationally recognized LEED system - the only accepted environmental certification program for buildings and structures - there are a variety of different evaluation/certification programs for roads or civil engineering structures at international, national and state levels. First of two-part article addressing "green roads" today.