 Fluvial transport is not often used for people, with the exception of those who cross the Río de la Plata from Buenos Aires to Colonia del Sacramento and Montevideo, both in Uruguay.Other services are exclusively used as river crossing, such as those in Tigre.River traffic is mostly made up of cargo, especially on the Paraná River, which is navigable by very large ships (Panamax kind) downstream from the Greater Rosario area.