To come up with a fair charge, you have to look at a number of factors, like gas, tolls and even the insurance to cover the goods in the truck. However, the go-to system is actually standardized in the industry. This system is handled by NMFC codes. The NMFC uses a number of factors to determine what class the shipment falls into, and from there, what fees will be associated with the shipment's transit. Visit the website for more details.