CL is a Carload rail service requiring shipper to meet minimum weight. It is officially the weight required for a carload rate to be applied. CL service is typically less expensive than LTL and TL service.
If you are shipping a large shipment, CL service may be the best option. Unlike LTL and TL shipments, there is no need to worry about meeting specific weight requirements with CL service. This makes it a more affordable option for larger shipments.
However, keep in mind that because CL service is less expensive than other options, it can also be less reliable. If your shipment is time-sensitive, you may want to consider another transportation option.
Often, the term carload is used to refer to the amount of cargo that fits in a rail car.
A Less-Than-Carload service also exists.