U.S. industrial production fell 1.1% in August, the Federal Reserve said Monday.
The decline in production at factories, mines and utilities was the biggest in three years.
Manufacturing, which accounts for about four-fifths of industrial production, fell 1% from July.
Economists had forecast a drop of 0.3%, Bloomberg reported.
The share of industrial capacity in use fell to 78.7%, the lowest level since October 2004.
The factory sector is one of trucking’s largest and most important customers.