Madrid continues with one of its largest ongoing projects: the undergrounding of the A-5 (the Extremadura highway), which will transform the western access to the capital. The southbound tunnel, for incoming traffic, is already 80% excavated. Meanwhile, the outbound tunnel is also making progress, having already reached the halfway point.
Several phases remain, such as laying the asphalt, but judging by the structure’s appearance, it is already possible to imagine what the final result will look like, as the technical team explained to Telemadrid.
Thanks to the good pace of the underground construction work, the project is expected to move to the surface in September and, on schedule, be ready for traffic in November 2026.
Innovation and energy underground
In the progress of the project, the new construction systems applied to the tunnel floor play a fundamental role, as they allow for the acceleration of the excavation process and the creation of the new structure.
According to the City Council’s project, in addition to the tunnel, there will be 14 emergency exits distributed along the entire route, every 200 meters. These exits will accommodate technical rooms and various utility systems to ensure the smooth operation of the underpass.
The earth’s own energy will also be harnessed through the installation of geothermal systems. Thus, Madrid will be able to use the heat from the tunnel and convert it into sustainable energy, reducing consumption and minimizing environmental impact.
The Future Green Promenade
A pedestrian boulevard will be created at ground level , connecting Avenida de Portugal with Madrid Río all the way to Avenida del Padre Piquer. This will reduce traffic and include 80,000 square meters of green spaces. Sidewalks will be wider, and pedestrian crossings will increase from 16 to 33, as reported by the city council.
But walking won’t be the only option for getting around this promenade, as there will also be a 3.5-kilometer bike lane. It will be two-way, equipped with traffic lights, and will connect the different neighborhoods with the city center.