The municipal government of Brazil's Sao Paulo city has yet to begin work on 33 infrastructure projects that have passed the study phase since 2005, according to a report by news service Agencia Estado.
While the city government spent 74mn reais (US$43.4mn) on studies for 70 projects, work has begun on only 37 of them.
The holdup is due to a municipal court ruling that vetoed the approval of contracts tendered in April, the report said.
One of the stalled projects is a 2.7km tunnel connecting Roberto Marinho avenue to the Imigrantes highway in the south of the city. The city government spent 38mn reais on studies for the project, as well as 21mn reais on studies for a new park above the tunnel.
If carried out, this work alone could add up to nearly 3bn reais, the report added.