In other news, shares of Graña y Montero tumbled after reports claimed the company was aware of its partner Odebrecht's plans to bribe government officials in exchange for infrastructure contracts.
Transport minister Jorge Rojas claimed that the Ruta del Sol 2 contract was the "only rotten apple" and he defended the transparency of tendering processes.
The funds spent on the country's road network have been a mixture of public spending and private investment, according to the head of infrastructure and the communications and transport ministry, Óscar Callejo.
In what he called the "city's largest privatization package," São Paulo mayor João Dória offered management of public transport cards to the private sector, including users' personal information.
Certainty, transparency and feasibility in public works projects are key to motivating investment in Mexico's infrastructure sector, according to a group of investment experts.
With investment slowing to a trickle in Peru due to the ongoing Odebrecht corruption investigation that involves the past three governments, the government is struggling to boost growth.
The Ruta del Sol consortium, headed by disgraced Brazilian firm Odebrecht, renounced its intentions of suing the state before an arbitration tribunal.