An unofficial proposal imagining a potential Line 13 of MetroSur, connecting municipalities such as Fuenlabrada, Parla, Pinto, and Valdemoro via a new circular route, has sparked an intense discussion among regular users and residents of the area. While not an institutional project, the idea reflects public interest in enhancing mobility in the southern metropolitan region.

In Alcorcón, the discussion is followed with particular attention due to the current saturation of some public transport connections in the southern part of the region. Although the municipality is not directly featured on the route shared on social media, many citizens are hopeful that any network expansion could ultimately benefit nearby cities through future links or improved service frequency.

The map notably proposes creating direct routes between southern towns without the need to travel through the capital's center. Users see this idea as a potential solution to reduce travel times and facilitate commutes between industrial and residential zones, as the supposed route would include new strategic stations in areas experiencing urban and business growth.

For years, residents and mobility experts in Alcorcón have called for significant investments to modernize and expand the public transport network in the southern Madrid region. The viral spread of this map online, while not an official project, underscores the public demand for new and efficient transport connections.