ARLINGTON, Va., June 26 /PRNewswire-USNewswire/ -- The American Trucking Associations' advance seasonally adjusted (SA) For-Hire Truck Tonnage Index rose for the first time since February 2009, gaining 3.2 percent in May. May's increase, which raised the SA index to 102.3, wasn't large enough to offset the March through April cumulative reduction of 6.7 percent. The not seasonally adjusted (NSA) index, which represents the change in tonnage actually hauled by the fleets before any seasonal adjustment, equaled 102 in May, up 0.4 percent from April.

Compared with May 2008, tonnage contracted 11 percent, which was the best year-over-year result in three months. Despite the improvement from April's 13.2 percent plunge, May's decrease is still historically large.

ATA Chief Economist Bob Costello said the month-to-month improvement was encouraging, but cautioned that tonnage is unlikely to surge anytime soon. "I am hopeful that the worst is behind us, but I just don't see anything on the economic horizon that suggests freight transportation is ready to explode," Costello said. "The consumer is still facing too many headwinds, including employment losses, tight credit, rising fuel prices, and falling home values, to name a few, that will make it very difficult for household spending to jump in the near term." He also noted that he doesn't expect tonnage to deteriorate much further and that any growth in tonnage over the next few months is likely to be modest.

Note on the impact of trucking company failures on the index: Each month, ATA asks its membership the amount of tonnage each carrier hauled, including all types of freight. The indexes are calculated based on those responses. The sample includes an array of trucking companies, ranging from small fleets to multi-billion dollar carriers. When a company in the sample fails, we include its final month of operation and zero it out for the following month, with the assumption that the remaining carriers pick up that freight. As a result, it is close to a net wash and does not end up in a false increase. Nevertheless, some carriers are picking up freight from failures, and it may have boosted the index. Due to our correction mentioned above, however, it should be limited.

Trucking serves as a barometer of the U.S. economy, representing nearly 69 percent of tonnage carried by all modes of domestic freight transportation, including manufactured and retail goods. Trucks hauled 10.2 billion tons of freight in 2008. Motor carriers collected $660.3 billion, or 83.1 percent of total revenue earned by all transport modes.

ATA calculates the tonnage index based on surveys from its membership and has been doing so since the 1970s. This is a preliminary figure and subject to change in the final report issued around the 10th day of the month. The report includes month-to-month and year-over-year results, relevant economic comparisons, and key financial indicators.

The American Trucking Associations is the largest national trade association for the trucking industry. Through a federation of other trucking groups, industry-related conferences, and its 50 affiliated state trucking associations, ATA represents more than 37,000 members covering every type of motor carrier in the United States.

SOURCE American Trucking Associations