Compared with February 2022, the SA index increased 2.3%, which was the 18th straight year-over-year gain, but the largest since October. In January, the index was up 1.4% from a year earlier. In 2022, compared with the average in 2021, tonnage was up 3.5%.
See also: Freight volumes, spot rates fall in February
The not-seasonally adjusted index, which represents the change in tonnage actually hauled by the fleets before any seasonal adjustment, equaled 107.6 in February, 4.5% below the January level (112.6), according to ATA. In calculating the index, 100 represents 2015. ATA’s For-Hire Truck Tonnage Index is dominated by contract freight as opposed to spot market freight.
Trucking serves as a barometer of the U.S. economy, representing 72.2% of tonnage carried by all modes of domestic freight transportation, including manufactured and retail goods. Trucks hauled 10.93 billion tons of freight in 2021. Motor carriers collected $875.5 billion, or 80.8% of total revenue earned by all transport modes.