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Infrastructure
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Administrator's Fact Book (FAA)
Overview of traffic, financial, infrastructure data
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General Aviation and Part 135 Activity Surveys (FAA)
Traffic, conditions and equipment
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Highway Statistics (FHWA)
Vehicles, drivers, miles of roadway, fuel, finance, and vehicle miles (annual)
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Toll facilities data (FHWA)
Statistics on toll bridges, tunnels, highways and ferries in the US
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Freight Facts and Figures 2011 (FHWA)
Volume and value of freight shipments, the extent of the network, employment and productivity, and related safety, energy use, and environmental effects.
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DOT Maritime Data Working Group (USDOT)
Links to sources.
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Navigation Data Center (US Army Corps of Engineers)
Data on ports and locks, domestic waterborne freight
