Argentina and Chile share one of the longest borders in the world, along the impresive Andes. Up to recently there were only one proper pass for commercial exchanges along the more than 4000 km length of this natural border. It seems impossible to project the development of the south american region and a satisfactory regiona l integration without more numerous and adecuate transit options.
The Agua Negra pass is one of the 13 border-crossing roads selected by Argentina and Chile in a bi-national plan to improve connectivity between the 2 countries. Agua Negra is idealy located in the central region of both countries, and represents a complementary solution to the current connection of Cristo Redentor between Mendoza and Valparaiso.
Information extracted from the EBITAN webpage. More information can be found in the spanish page of ANDES, here, or at EBITAN (also in spanish).