The National Motor Freight Transportation system catalogs and equitably groups all commodities moving into 18 classes (class 50 through 500) according to their “transportability”. These classes are based on four transportation characteristics prescribed by the ICC and The Department of Transportation’s Surface Transportation Board. These characteristics are as follows: (1) density; (2) stowability; (3) ease or difficulty in handling; and (4) liability.

If you need help in determining what your actual freight class is, please contact GMG Transportation for personalized help at This email address is being protected from spambots. You need JavaScript enabled to view it., or 1-888-826-4321, or contact your Account Manager.

You can learn more about freight classifications by visiting The National Motor Freight Traffic Association, Inc. at