to avoid a possible collapse of the border crossing in the event of a prolonged disabling of the main tunnel, the construction of two new tunnels has been proposed. the first is the juan pablo ii tunnel, which would be built 20 km from the current one at a height of 2,250 meters above sea level and would have a length of 27.2 km. this tunnel would join the towns of horcones in argentina, and juncal in chile.