The Federal Highway Administration's National Highway Construction Cost Index (NHCCI) is a quarterly price index intended to measure the average changes in the prices of highway construction costs over time and to convert current-dollar highway construction expenditures to real dollar expenditures.

Personal spending on transportation services includes spending on motor vehicle services, such as maintenance and repair, and public transportation, including rail transportation, intercity buses, taxicabs and ride sharing services, intracity mass transit, air transportation, and water transportation. The Bureau of Economic Analysis estimates personal consumption expenditures, the primary measure of consumer spending on goods and services in the U.S. economy, for each quarter and releases new statistics every month. Quarterly PCE data are seasonally adjusted at annual rates to remove the effects of normal seasonal variation.

Rail intermodal traffic is comprised of shipping containers and truck trailers moved on rail cars, which transport a large range of goods. The Association of American Railroads releases data on carloads and intermodal units originated by U.S. railroads on a weekly and monthly basis.

General aviation fatalities include private aviation operations and excludes Federal Aviation Regulation (FAR) Part 121 (Air Carriers), 129 (Foreign), 135 (On-Demand), and Non-U.S./Commercial operations. The National Transportation Safety Board releases aviation fatality data in the Aviation Accident Database.

Customer on-time performance is the percentage of customers who arrive at their detraining stations on time. An Acela train is late when it arrives at a station more than 10 minutes after its scheduled time; a Northeast Regional or State-Supported train is late when it arrives more than 15 minutes after its scheduled time. For years before FY 2018, on-time performance is the percentage of total train arrivals on-time at each station, with every arrival weighted equally. Amtrak reports system performance in monthly Host Railroad Reports.

The Bureau of Transportation Statistics releases non-seasonally adjusted air traffic data based on monthly reports from commercial U.S. air carriers.

Rail carload traffic is comprised of mostly bulk commodities, such as coal and agricultural products. The Association of American Railroads releases data on carloads and intermodal units originated by U.S. railroads on a weekly and monthly basis.

A monthly measure of the volume of services performed by the for-hire transportation sector. The index covers the activities of local mass transit, intercity passenger rail, and passenger air transportation.

The Bureau of Transportation Statistics releases seasonally adjusted air traffic data based on monthly reports from commercial U.S. air carriers.

Percentage of flights arriving on-time. A flight is on-time if it arrives within 15 minutes of the schedule arrival time. Data are available for those carriers that had at least 1% of domestic enplanements in the previous year. The last 25 months of data include only carriers that reported in each of the last 25 months to retain comparability. Earlier data includes all reporting carriers. A scheduled operation consists of any nonstop segment of a flight. The Bureau of Transportation Statistics air collects performance data from U.S. air carriers and international carriers operating within the U.S.