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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

General

Legacy ID
201

Infrastructure

Infrastructure

Pipelines showed the largest increase in system mileage from 2005 to 2006 of any components of the transportation system. Hazardous liquid pipeline mileage increased 6.2 percent, and gas pipeline mileage increased 6.7 percent.

The number of U.S. airports...