U.S. Department of Transportation

Airline Fuel Cost and Consumption (U.S. Carriers - Scheduled)

Data are seasonally adjusted and indexed.

Travel on all roads and streets changed by +0.1% (+0.2 billion vehicle miles) for April 2023 as compared with April 2022. Travel for the month is estimated to be 256.1 billion vehicle miles. The seasonally adjusted vehicle miles traveled for April 2023 is 267.0 billion miles, a +1.2% (+3.2 billion vehicle miles) change over April 2022. It also represents a +0.1% change (+0.2 billion vehicle miles) compared with March 2023.

Seasonally-Adjusted Data : Statisticians use the process of seasonal-adjustment to uncover trends in data. Monthly data, for instance, are influenced by the number of days and the number of weekends in a month as well as by the timing of holidays and seasonal activity. These influences make it difficult to see underlying changes in the data. Statisticians use seasonal adjustment to control for these influences. Controlling of seasonal influences allows measurement of real monthly changes; short and long term patterns of growth or decline; and turning points. Data for one month can be compared to data for any other month in the series and the data series can be ranked to find high and low points.

The Transportation Services Index (TSI), created by the U.S. Department of Transportation (DOT), Bureau of Transportation Statistics (BTS), measures the movement of freight and passengers. The index, which is seasonally adjusted, combines available data on freight traffic, as well as passenger travel, that have been weighted to yield a monthly measure of transportation services output. Source: TSI numbers are BTS estimates. Note: Monthly data changes with each release due to the use of concurrent seasonal analysis, which results in seasonal analysis factors changing as each month's data are added.

Note: Values have been converted to millions from thousand to maintain uniformity. Methodology: Thousand values multiplied with "0.001" to convert into million.