The Plan, which would come to define the boundaries of the Historical Sector of Curitiba in a decree in 1971 and would lead to the inauguration of the Teatro Paiol (Paiol Theater) in December of that same year, came up against its first battle in May, 1972. It involved blocking the traffic of vehicles along the Rua XV de Novembro, initially along a stretch that went from Rua Ébano Pereira to Rua Rio Branco, a task carried out in 48 hours, during a weekend, so that the merchants owning stores in the area would not be able to file for a court injunction against the measure, alleging that they would suffer losses in business.
In the project designed by Serete, the main roadways of Curitiba had been defined, as well as the large North-South and East-West structural road axes. The Ippuc team refined the concept by adopting a ternary system, which was implemented in the following manner: a two-way road with a slower flow of traffic, and an exclusive lane for vehicles providing public transportation, and two parallel roads, each moving in one direction (one going to and the other coming from the central area), both for the flow of high speed traffic.
Another idea derived from the Master Plan was that of the creation of parks, for Curitiba needed green areas. It was determined that, instead of creating land developments in the large empty urban areas, a priority would be maintained to expropriate areas and set up parks, preventing the city from suffering a great impact due to floods and promoting its water and sanitation system.