In December, truck freight volumes in the spot market rose 5 percent, year over year, according to the DAT North American Freight Index. Even though the result made for the busiest December since the index's inception in 1996, it still came on a month-to-month decline of 18.4 percent. This follows a typical seasonal pattern, according to a press release, and the decrease is especially severe because of a robust November. Volume has dropped from November to December by an average of...