April’s decline was revised up from ATA’s previous number.
Compared with May 2021, the SA index increased 3.7%, which was the ninth straight year-over-year gain and the largest since April 2021. In April, the index was up 2.5% from a year earlier. In 2022, year-to-date and compared with same period in 2021, tonnage was up 2.7%.
The not seasonally adjusted index, which represents the change in tonnage actually hauled by fleets before any seasonal adjustment, equaled 119.7 in May, 4.2% above the April level (114.8). 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 72.5% of tonnage carried by all modes of domestic freight transportation, including manufactured and retail goods. Trucks hauled 10.23 billion tons of freight in 2020. Motor carriers collected $732.3 billion, or 80.4% of total revenue earned by all transport modes.