Presented by rio de janeiro's prefecture, the study Rio de Janeiro: uma cidade conectada por túneis (rio de janeiro: a city connected by tunnels), by Ronaldo Cerqueira Carvalho looks at the many urban tunnels in the city of Rio de Janeiro and shows a wave of influences expanded by the advent of each one of the carioca tunnels, on the prism of socio economics, cultural and humanists connections, mirrored and catalyzed by the flux that these passages make viable - tunnels in the districts of  copacabana, leme, botafogo, laranjeiras, catumbi, rio comprido, gamboa, saúde, santo cristo, tijuca, vila isabel, barra da tijuca, são conrado, and joá are examined, among others.