The American Trucking Associations' (ATA) seasonally adjusted truck tonnage index fell .7% in June after gains in April and May.
ATA Chief Economist Bob Costello says the decrease reflects a "deceleration in overall economic growth. The economy has slowed some from the first quarter of the year.
"However, there continues to be a favorable supply-demand market. Also, considering solid growth in manufacturing production, especially in durable goods products, we expect to see a strong fall freight season."
The ATA calculates tonnage based on membership surveys.
