But the government is unlikely to attract much interest, due to the challenging nature of potential prison PPPs.
The government seeks to offer a 33-year concession for the Fiol railway, which also requires the contract winner to complete the remaining 25% of project.
The decision to award the contract to upgrade the Escuintla-Quetzal highway to Consorcio Autopistas de Guatemala was announced last month, but was pending the approval of the council for the development of infrastructure partnerships (Conadie).
The approval comes right when the city is facing severe water scarcity problems.
Following a decade of planning, the Colombian capital's government started the first phase of the bidding process for the the US$4.4bn project, which is also being financed by the World Bank, the IDB and the European Investment Bank.