Infrastructure

Public road lanes are measured in lane-miles. Transit modes are measured in directional route-miles. Light Rail was revised beginning in 2011 and includes light rail, street car rail, and hybrid rail. Navigable waterways are estimated length of domestic waterways.

Sources:

Highway, Pipeline, Rail, Transit, Water - As cited in U.S. Department of Transportation, Bureau of Transportation Statistics, National Transportation Statistics, tables 1-1, 1-6, and 1-10, available at https://www.bts.gov/nts.

Key: LNG = liquified natural gas; Empty Cell = data are not available.

Certificated airports serve air carrier operations with aircrafts seating more than nine passengers. Light rail stations was revised beginning in 2011 and includes light rail, street car rail, and hybrid rail. Water Ports handling over 250,000 short tons included. Cargo handling docks data for 2009 and 2019 are not comparable due to changes in data coverage. 

Air, Highway, Rail - As cited in U.S. Department of Transportation, Bureau of Transportation Statistics, National Transportation Statistics, tables 1-3, 1-7, and 1-28, available at https://www.bts.gov/nts. Pipeline—U.S. Department of Transportation, Pipeline and Hazardous Materials Administration, available at https://www.phmsa.dot.gov/. Transit - U.S. Department of Transportation, National Transit Database, available at https://www.transit.dot.gov/ntd/. Water - U.S. Army Corps of Engineers, Navigation Data Center,  Transportation Facts and Information, available at http://www.navigationdatacenter.us/.

Light-duty vehicle includes passenger cars, light trucks, vans, and sport utility vehicles. Transit rail includes revenue vehicles available for maximum service. Light rail was revised beginning in 2011. 

Sources:

As cited in U.S. Department of Transportation, Bureau of Transportation Statistics, National Transportation Statistics, table 1-11, available at https://www.bts.gov/nts.

Po0r: Large open cracks, surface and edge spalling, vegetation growing through cracks and joints; or widespread, severe cracking with raveling and deterioration.

Fair: No visible deterioration, or all cracks and joints are sealed.

Good: No visible deterioration, or all cracks and joints are sealed.

National Plan of Integrated Airport Systems (NPIAS) airports include commercial service airports, reliever airports, and selected general aviation airports.

As cited in U.S. Department of Transportation, Bureau of Transportation Statistics, National Transportation Statistics, table 1-25, available at https://www.bts.gov/nts.

Poor: IRI > 170

Fair: IRI 95 - 170

Good: IRI < 95

Pavement condition is measured by the International Roughness Index (IRI) which takes a longitudinal profile of pavement roughness based on one-way facility centerline miles. A lower IRI indicates smoother highway conditions and a higher IRI indicates rougher highway conditions.

U.S. Department of Transportation, Federal Highway Administration, Highway Statistics, table HM-47, available at https://www.fhwa.dot.gov/policyinformation/statistics.cfm/ .

The deck area calculation was changed as of 2018 in accordance with 23 CFR 490.409.

As cited in U.S. Department of Transportation, Bureau of Transportation Statistics, National Transportation Statistics, tables 1-28, available at https://www.bts.gov/nts .

U.S. Department of Transportation, Federal Highway Administration, National Bridge Inventory, available at https://www.fhwa.dot.gov/bridge/nbi.cfm .