THOMASVILLE, N.C. - Old Dominion Freight Line, Inc. (NASDAQ:  ODFL) has received the 2015 Mastio Award for the sixth consecutive year. The company led all national less-than-truckload (LTL) carriers in Mastio's annual Customer Value & Loyalty Report.  Mastio & Company conducts the annual LTL shipping survey to gauge customer satisfaction and loyalty among more than 2,000 industry professionals. The winner is selected based on evaluations and customer perceptions of more than 300 LTLcarriers regarding service categories such as pricing, on-time and damage-free deliveries, quality of service and overall satisfaction.  "We are always gratified when customers express their confidence and loyalty in OD in this highly competitive market," said David Congdon, vice chairman and CEO of Old Dominion Freight Line. "This award will allow potential customers and competitors alike to see that we excel in the crucial customer satisfaction areas of carrier responsiveness and our customers' ease of doing business with OD." Mastio said of its LTL study: "The simple truth is customers base their purchase decision on which carriers provide the best-perceived value."