M-30 underground, Spain
M-30 underground, Madrid
The underground M-30 was part of the proceedings necessary for the remodeling of the urban highway in Madrid, with a length of 3,347 meters.
The work consisted of burying 1,666 meters: two-way three lanes, one in each direction, that link to the south bypass; and two, two-lane going to the southern junction.
It is a work of great technical complexity, which required careful planning and coordination of the various jobs. The project was completed four months before provided.