In order to make the US$550mn project more attractive, bidders will now be able to change the design of a section of the road that has drawn opposition from local residents.
Mexico's president gave details on signature projects like the Maya train and Mexico City's three-airport system, among others.
The participation of private sector players is considered to be crucial for the success of concessions in the country.
Works on a US$21mn project to build three new bridges, which was planned before the January emergency, are now expected to begin in May 2020.
The plant, which will be built by the Cartes and Jiménez Gaona groups, is expected to have production capacity of 1Mt of cement per year.