Shippers had an easier time finding trucks last week after a two-week contraction in supply, according to the latest Longbow Research Truckload Barometer.
The weekly index, which rises when truckload capacity tightens, dropped 9.5 percent after rising 15.4 percent in late July and early August.
Capacity remains tighter than a year ago, however, Longbow said. Year-to-date, the average index reading is up 31 percent over the same period in 2010.
Overall, the index shows stability in the truckload market, with truck supply rising and falling this summer in a normal seasonal pattern.
Truck capacity typically fluctuates as the produce season rolls from coast to coast, starting in the Southeast and ending in the Pacific Northwest. A survey by The Journal of Commerce found capacity at a group of large truckload carriers was only 1 percent lower than a year ago at the end of June.