The contract was awarded last December and the works will be on a stretch covering 84.6km of highways and 4.8km of access roads.
The tenders are for the construction of the eight stations included in Monterrey's line No.3 metro project, which will serve the metropolitan area of Nuevo León's capital city.
The project is expected to last two years and includes both the tunnel itself and accesses.
Rotterdam Port and officials in the Brazilian state of Ceará are exploring ways of improving productivity and operations at Pecém port and attracting investment.
Planned investments to the tune of approximately US$720mn will be a combination of public and private funds.
The budget for the Mendoza province project is around US$80mn and bids will be opened next month.
The leaders of the two nations signed agreements that include cooperation in the areas of infrastructure, commerce, security and labor practices.
Public works ministry will ask the comptroller general's office to reconsider its decision to issue a recommendation that a tendering process for the Silvio Pettirossi airport be scrapped.