The project involves road rehabilitation works and is mainly financed by the Inter-American Development Bank.
Last year's investments rose to four times the public works ministry's historical average, to be superseded yet again in 2018.
The operator claims that current capacity doesn't warrant investments in expansion.
Most resources will flow to maintenance works.
The initiative involves the widening of a stretch between the Bridge of the Americas and Arraiján.
The funds have been greenlighted by Brazil's transport ministry.
Ecorodovias will buy the remaining 42% stake of the highway concessionaire.
Three contracts to build ISSSTE-operated hospitals under public-private partnerships were awarded in 2017.
Proceeds will be used for, amongst others, repaving, lighting, and maintenance works.