A drop trailer is a trailer that is detached from the tractor unit of a truck and left at a specified location for loading or unloading. The trailer is “dropped” at the location and the tractor unit is returned to the shipper or carrier to pick up another load. Drop trailers are often used in intermodal transportation to move shipping containers between modes of transportation, such as from a truck to a train or vice versa. They can also be used to transport goods within a particular geographic area, such as within a city or region. Drop trailers allow for the efficient movement of goods and can help to reduce the cost of transportation by reducing the number of empty miles that a truck travels.