The project includes the construction of two new stations at Quadra 111 and Quadra 117 as well as three viaducts, a tunnel, and an electrical substation.

According to Brasilia metro operator DF Metro, studies indicate that the two new stations generate 9800 additional daily trips on the network.

The estimated value of the contract is Reais 123m, with 88% of the funds coming from the Brazilian government’s general budget and the remainder from the Federal District.

A winning bidder is due to be selected in January 2019 and construction is expected to take up to 30 months.

The project is part of a broader programme to modernise and extend Line 1, which has been divided into four phases to facilitate the gradual release of funds from the Ministry of Cities.

According to the governor of the Federal District, Mr Rodrigo Rollemberg, 106 South, Cine Brasilia, and 110 South stations will open to passengers by November, with Águas Claras expected to open by the end of the year.