Commercial trailer factory shipments were up 52 percent for all of 2010 and net orders increased 105 percent. ???Comparatively speaking, 2010 was a good year for the commercial trailer industry as factory shipments rebounded by 52 percent,??? said Kenny Vieth, ACT president and senior analyst, in a statement. ???However, the fact that even with that increase, 2010 was the second worse year for fac