Drop and hook freight is a straightforward shipping process for trucking companies that involves “dropping” one trailer at a warehouse and “hooking” a new one from the same source. One of those trailers can be empty or they can both be loaded trailers. The key is that the trailers are traded. Drop and hook trucking is terminology in the trucking industry, which refers to a delivery option that allows the driver dropping off a full load to hook up to a preloaded or empty container at the same facility.