For the month of December, 49,700 Classes 5-8 vehicle orders were booked, up 40% month over month, according to ACT Research Co.’s preliminary numbers.

“December’s volume represented the strongest aggregate month for net orders since 50,900 orders were booked in February 2015,” said Kenny Vieth, ACT’s president and senior analyst. “Despite being up sequentially, orders fell over 17,000 units, or 26%, from December 2014, marking the ninth consecutive month in which industry orders fell below year-ago levels.”

At 28,100 units in December, North American Class 8 net orders were the best since February. Orders in December were up 68% compared to November’s weak tally, but at the same time fell 36% below last December’s fourth-best-ever volume. Seasonal adjustment drops December’s Class 8 orders to 22,500 units.

Strong orders continued for Classes 5-7 in December, with orders rising above 20,000 units for the third time in the past four months—a feat last accomplished in mid-2006. For the month, NA MD Classes 5-7 vehicle net orders were 21,600 units. While up 15% from November, December’s order volume was down 5% from a year ago.