[1] It's primarily a single lane highway, historically and economically important for connecting the plateau and western Santa Catarina with the coast.

Currently, 73 km are being duplicated in the most important and busiest section, between the urban centers of Navegantes, Gaspar, Blumenau and Indaial, where the state's textile, glass, porcelain and metalworking industries are concentrated.

The completion of the duplication will have to do with a large increase in the logistics and economic capacity of the cities, the Port of Itajaí, the Navegantes Airport and in the flow of production from the west of the state and part of the Serra Catarinense.

[2] It has winding and poorly marked sections in the state of Santa Catarina, as well as unpaved or non-existent areas in Rio Grande do Sul.

Dilma Rousseff promised in 2011 the doubling of 73 km of the highway, between Indaial and Navegantes, in addition to the concession to the private sector of the Santa Catarina section.