“The good news is that truck tonnage increased in May,” said ATA Chief Economist Bob Costello in a statement. “But tonnage is certainly not strong at the moment as factory output is soft and there is an inventory reduction occurring throughout the supply chain. I believe the inventory correction should end this summer and truck freight, helped by better personal consumption, will accelerate, which is good because I think it is unlikely factory output will boost truck tonnage much until later this year or next year.”