Old Dominion Freight Line Provides Update for Second-Quarter 2021 THOMASVILLE, N.C.--(BUSINESS WIRE)--Old Dominion Freight Line, Inc. (Nasdaq: ODFL) today reported certain less-than-truckload (LTL) operating metrics for May 2021. Revenue per day increased 47.6% as compared to May 2020 due to a 28.3% increase in LTL tons per day and an increase in LTL revenue per hundredweight. The change in LTL tons per day was attributable to a 32.6% increase in LTL shipments per day that was partially offset by a 3.2% decrease in LTL weight per shipment. For the quarter-t