Net U.S. trailer orders slipped below 7,600 in March as cancellations sliced the gross tally nearly in half and production slowed, Act Research reported. Orders were 7,595 and gross orders were 13,279, or 43 percent higher before cancellations, according to Act. Net orders were 15,783 a year earlier. Frank Maly, Act’s director of commercial vehicle transportation analysis, says he expects significant double-digit declines in gross domestic product in the second quarter, which would have a negative effect on trailer demand. Don Ake, vice president of commercial vehicles for FTR, sees similarities in equipment demand with the Great Recession, which lasted from December 2007 to June 2009.