Earnings reports from transportation companies continue to paint a mixed picture throughout the industry. The spotlight yesterday was on truck supplier Dana, freight rail carrier Norfolk Southern and parcel giant UPS, and all three beat analysts’ expectations for quarterly earnings per share. Only UPS, however, reported a surge in revenue — to $21.23 billion from $18.31 billion in the 2019 period. Despite the promising quarterly reports, shares of each company traded down yesterday during a broader market sell-off, with UPS falling nearly 9 percent — the stock’s steepest drop since 2015. Amazon, Hub Group and Schneider National are among those hosting earnings calls today.