KNX | Knight-Swift Transportation |
ULH | Universal Logistics |
CVLG | Covenant Logistics Group |
ODFL | Old Dominion Freight Line |
PTSI | P.A.M. Transportation Services |
MRTN | Marten Transport |
HTLD | Heartland Express |
SNDR | Schneider National |
WERN | Werner Enterprises |
SAIA | Saia |