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Open Access Publications from the University of California

Linkages Between Transportation Planning and the Environment


Transportation investments have in the past among society’s most important contributors to environmental improvement, but today transportation programs and projects are more often of concern as sources of major environmental problems. Over the past 30 years, since the enactment of the National Environmental Protection Act (NEPA) and the first Clean Air Act amendments, the relationship between transportation planning and environmental policy making has continuously become more complex and problematic.

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