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He also writes that the U.S. is slowly catching up with the rest of the world.
"The United States, which has lagged far behind Europe in developing diversified urban transport systems, is being swept by a "complete streets" movement, an effort to ensure that streets are friendly to pedestrians and bicycles as well as to cars. Many American communities lack sidewalks and bike lanes, making it difficult for pedestrians and cyclists to get around safely, particularly where streets are heavily traveled.
This cars-only model is being challenged by the National Complete Streets Coalition, a powerful assemblage of citizen groups, including the Natural Resources Defense Council, AARP, and numerous local and national cycling organizations."