American Trucking Associations’ advanced seasonally adjusted For-Hire Truck Tonnage Index increased 0.5% in September after rising 2.1% in August. In September, the index equaled 118.8 versus 118.2 in August.

“The latest gain put tonnage at the highest level since August 2019 and the third highest level on record,” said ATA Chief Economist Bob Costello in a press release. “This is another example of how the contract freight market remains strong despite weakness in the spot market this year. During the third quarter, tonnage increased 0.5% over the second quarter while increasing 5.6% over the same period in 2021. That was the largest quarterly year-over-year increase since the second quarter of 2018.”

Compared with September 2021, the SA index increased 5.5%, which was the thirteenth straight year-over-year gain. In August, the index was up 6.7% from a year earlier. Year-to-date through September, compared with the same period in 2021, tonnage was up 4%.

The not seasonally adjusted index, which represents the change in tonnage actually hauled by fleets before any seasonal adjustment, equaled 119 in September, 3.8% below the August level (123.7). 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.

ATA calculates the tonnage index based on surveys from its membership and has been doing so since the 1970s.