Cass Freight is a great way to get early warnings of what is coming in the economy. Their October report is worth a read (found here). This is to provide a reference for when their December report comes out. These guys are the source.
Their headline sums it up:
11 months in a row negative volume. It only takes 6 months in a row for to officially be a recession. Ummm. Oh don't forget Class 8 truck orders for November collapsed 39% YoY. Don't worry, nothing to see here.