The not seasonally adjusted index, which represents the change in tonnage actually hauled by the fleets before any seasonal adjustment, equaled 113.5 in February, which was 5.5% below the previous month (120.1).
'Fitting with several other key economic indicators, truck tonnage is up earlier than we anticipated this year,' ATA Chief Economist Bob Costello said. 'While I think this is a good sign for the industry and the economy, I'm still concerned that freight tonnage will slow in the months ahead as the federal government sequester continues and households finish spending their tax returns. A little longer term, I think the economy and the industry are poised for a more robust recovery.'
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.