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Structure of Transportation Activities
Federal Regulation and Promotion
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air carrier air pollution air quality airports alternative Amtrak annual costs Auto-Train Corporation automobile average aviation capital costs capital expenditures carbon monoxide carpool cities class I railroads CM CM cm ro Commuter rail constant dollars CP CP Department of Transportation dollars emissions facilities Federal funds Federal Highway Administration Federal-aid Figure financing freight fuel fuel tax Government highway improvements included increase intercity Interstate investment jitney major ment miles million Minor arterials modal mode and population motor nitrogen oxides NVld paratransit parking passenger passenger-miles peak-hour period pipeline population class portation ports principal arterials projected rail rapid transit railroads reported revenues ro CM ro ro rural seat-miles Source taxicab tion traffic trans transportation planning transportation programs U.S. Department urban public transportation urban transportation urbanized areas vehicle-miles vehicles