Aside from a lower budget for the Route 66 contract, the tender is now divided into two main units and also includes electronic toll gates.
The auction for a stretch of BR-101 highway is expected to take place in the third quarter of 2019.
Last year, state owned EPV and concessionaire TPS accused each other of anti-competitive practices.
The decision affects mainly the privatization of distributors in Brazil's Amazonas and Alagoas states.
The International Finance Corporation's country manager/Mexico says it is still too early to know if the possible cancellation of the mega airport currently under construction east of Mexico City could send a negative message to international investors.