[2] The Freeway, a 96.6 km stretch that connects Porto Alegre to Osório, was inaugurated on the morning of September 26, 1973, as an alternative to RS-030 for the coast, now known as Estrada Velha.

It was the first Brazilian highway, with a limit of 120 km/h at the time of the opening of its double lanes, separated by a wide central construction site.

Subsequently, the Federal Government lowered the Freeway's speed limit to 80 km/h, due to the oil crisis in the 1970s, to save fuel.

[3][4] The duplication works of 115.7 kilometers of the highway, between Eldorado do Sul and Pantano Grande, started in 2015.

Due to the economic crisis by which the Brazil goes through, DNIT is prioritizing other works, such as the duplication of BR 116 and Ponte do Guaíba.