Different freight companies and brokers have better discounts on certain lanes than others. These discounts change based on the amount of freight going from area to area at any given time.

To gain this benefit you can use this calculator to filter out your shipment class and put it as right inputs.
This calculations are the help support to make your job easy referring from National Motor Freight Traffic Association, Inc. publishes the National Motor Freight Classification® (NMFC®) which is a standard that allows for determining of freight classes for the comparison of different commodities and products being shipped.