ATA calculates its tonnage index based on membership surveys. In April, the index equaled 112.5, up from 110.1 in March. Year-to-date tonnage increased 8 percent compared with the same period in 2017.
“Truck freight tonnage remains robust,” said Bob Costello, the ATA’s chief economist. “Longer-term, strength in consumption, factory output and construction should keep truck freight tonnage solid for the quarters ahead.”
A delay in the produce season because of weather constraints contributed to the slight decline in freight tonnage in March, Costello said.
Trucking hauls nearly 71 percent of tonnage carried by all modes of domestic freight transportation. The industry accounts for about $676.2 billion in freight business, or 79.8 percent of total revenue earned by all transport modes, according to the ATA.