The tender calls for widening of a 2.25km section of the Radial Santa Ana highway, which runs from the Virilla bridge to another bridge that crosses the Corrogres river.
The approved credit line will serve to fund infrastructure and energy projects, and forms part of a larger financing strategy for Central America's northern triangle countries.
The Brazilian company reported lower earnings in the third quarter.
The US$12mn project involves widening several sections of the capital's western access road network. Works are expected to start next month.
The Brazilian group looks to renew and expand its concessions portfolio.
BNamericas takes a look at some of the immediate reactions that followed president-elect Andrés Manuel López Obrador's announcement to honor the results of the referendum that sealed the fate of the controversial airport project.
The public works minister admitted work on many projects has not started due to inability to close financing.
The auction will take place on Thursday.