The proposal will replace the mega airport that is still under construction east of Mexico City.
Legislators allege that concessionaire Yilport has only carried out 36% of the works outlined in the Puerto Bolívar concession contract after a year and a half of operations.
The city is planning a series of concessions, including for parks and cemeteries.
Apart from authorizing the works, regulator ANTT also permitted a toll hike above inflation.
Enrique Horcasitas, the official who was in charge of overseeing the construction of the city's 12th metro line, was accused of being responsible for numerous irregularities in the project which resulted in operations being halted.
The plan entails widening an 11km section near the city of Rancagua and maintenance and safety works on another four roads operated by the concessionaire.