A term for roll-on roll-off cargo which is driven on and off the vessel. RORO cargo consists of items such as tractors, buses and trucks, or oversized cargo loaded on special flatbed, mafi or lowboy trailers.

"Car carrier" redirects here. For the railroad car, see Autorack. For the trailer towed by a tractor, see car carrier trailer.
Loading a ro-ro passenger car ferry
Roll-on/roll-off (RORO or ro-ro) ships are vessels designed to carry wheeled cargo, such as automobiles, trucks, semi-trailer trucks, trailers, and railroad cars, that are driven on and off the ship on their own wheels or using a platform vehicle, such as a self-propelled modular transporter. This is in contrast to Lift-on/Lift-off (LoLo) vessels, which use a crane to load and unload cargo.

RORO vessels have built-in ramps that allow the cargo to be efficiently rolled on and off the vessel when in port. While smaller ferries that operate across rivers and other short distances often have built-in ramps, the term RORO is generally reserved for larger oceangoing vessels. The ramps and doors may be stern-only, or bow and stern for quick loading.