Dry Van

A dry van is any truck trailer that is enclosed and protected from the elements—think of your typical semi-truck or ‘box’ truck with a door on the back. Although the cargo is protected from rain (hence the “dry” van), it is not temperature-controlled.

In this sense, a dry van definition is often given by learning what a dry van is not. It is not a refrigerated freight truck, or “reefer,” which can carry fresh produce, dairy, meat, and other items that must be temperature-controlled.

A dry van is also not a flatbed truck. A flatbed is not enclosed on top, thus exposing the loads to the elements or requiring the use of tarps. Flatbeds can also be open on the sides to make it easier to load and unload very large or unusually shaped freight, particularly in areas where there is no loading dock. You’ll often see lumber, heavy equipment, large pipes, and even modular homes transported on flatbeds.

Refrigerated Trailers

Refrigerated trucks and trailers (or reefers) are an integral part of transporting freight that requires climate-controlled conditions. Almost all perishable foods and medicines are delivered in trucks or tractor trailers equipped with transport refrigeration units (TRUs), which are most often powered by small diesel engines. While modern diesel engines emit less emissions compared to older engines, there are new TRU designs and systems with electric plug-in capabilities that can significantly reduce emissions, particularly while parked at distribution centers, warehouses, and grocery stores and centers. Additional resources describing these systems and opportunities will be coming soon. In the meantime, please explore the EPA’s new TRU Emissions Calculator and existing guidance from the DERA program.