preliminary truck orders for March 2019 which showed that Class 8 truck orders collapsed an astounding 66%. The decline is being attributed to a 300,000+ vehicle backlog potentially prompting fleets to halt purchases in the near term, however it is also likely that concerns about the economic slowdown are also playing a major part in the latest collapse
https://www.zerohedge.com/news/2019-04-03/class-8-heavy-truck-orders-crash-66-march