Medium-duty orders increased 5% to 24,200 units in March from the prior month, according to preliminary data from ACT Research.

Orders of Classes 5 to 7 vehicles increased 3% from March of 2016 to record the best month in over nine years since February of 2008, according to the company.

"Since March is a seasonally strong order month, seasonal adjustment docks the month’s order volume to 22,200 units," said Kenny Vieth, ACT’s president and senior analyst. He continued, "Using this methodology, March orders failed to eclipse the January 2017 tally."

When combined with Class 8 orders, Classes 5 to 8 increased to 47,300 units for a 19% improvement year over year. Class 8 orders reached a seasonally adjusted 23,400 units, which was an increase of 2% from February.