Brazil's railway system has been declining since 1945, when emphasis shifted to highway construction. The total length of railway track was  in 2002, as compared with  in 1970. Most of the railway system belonged to the Federal Railroad Corporation RFFSA, which was privatized in 2007. The São Paulo Metro was the first underground transit system in Brazil. The other metro systems are in Rio de Janeiro, Porto Alegre, Recife, Belo Horizonte, Brasília, Salvador and Fortaleza. The country has an extensive rail network of  in length, the tenth largest network in the world. Currently, the Brazilian government, unlike the past, seeks to encourage this mode of transport; an example of this incentive is the project of the Rio–São Paulo high-speed rail, that will connect the two main cities of the country to carry passengers.