The State of U.S. Public Transportation Sustainability for the 21st Century
时间：2007-08-10 来源：千龙网 作者：Pamela L. Boswell
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基本信息
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题目：The State of U.S. Public Transportation Sustainability for the 21st Century
作者：Pamela L. Boswell
单位：美国公共交通协会副主席
摘要：U.S. ships 19 billion tons of freight annually 15,000 ton miles of freight is shipped per person per year，Americans take 550 billion trips per year covering 5.5 trillion miles
