Line 4 of the Rio de Janeiro Metro

Rio de Janeiro Metro

The Rio de Janeiro Metro is a mass-transit underground railway network that serves the city of Rio de Janeiro, Brazil. Founded in 1979 with five stations operating on one line, it now covers 47 km divided into two lines and 35 stations...

will run from General Osório to Jardim Oceânico. Construction of this line started in June 2010. It will reach the Barra da Tijuca

Barra da Tijuca

Barra da Tijuca is a famous neighborhood in Rio de Janeiro, Brazil, located southwest of the city on the Atlantic Ocean. Barra, as it is popularly known, will have most of the venues of the 2016 Summer Olympics, which will be the first edition held in South America. Barra is well-known for its...

 neighbourhood in the West Zone, passing under São Conrado

São Conrado

São Conrado is an affluent neighborhood in the South Zone of the Brazilian city of Rio de Janeiro. It is nestled in between the wealthy neighborhoods of Barra da Tijuca to the southwest and Leblon to the northeast...

 and Rocinha

Rocinha

Rocinha is the largest favela in Rio de Janeiro, Brazil, and is located in Rio's South Zone between the districts of São Conrado and Gávea. Rocinha is built on a steep hillside overlooking Rio de Janeiro, and is located about one kilometre from a nearby beach...

. All stations will be underground, but there will be a bridge leading to a tunnel inside a mountain.

The Government of the State of Rio de Janeiro

Rio de Janeiro (state)

Rio de Janeiro is one of the 27 states of Brazil.Rio de Janeiro has the second largest economy of Brazil behind only São Paulo state.The state of Rio de Janeiro is located within the Brazilian geopolitical region classified as the Southeast...

remains responsible for the expansion of metro network, through Rio Trillhos.