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In page Rail transport:

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Railways channel growth towards dense city agglomerations and along their arteries.[citation needed] This contrasts with highway expansion, indicative of the U.S. transportation policy post-World War II, which instead encourages development of suburbs at the periphery of metropolitan areas, contributing to increased vehicle miles travelled, carbon emissions, development of greenfield spaces, and depletion of natural reserves.[citation needed] These arrangements revalue city spaces, local taxes,[1] housing values, and promotion of mixed use development.[2][3]