The relationship between planners and preservationists is difficult due to Italy's strict preservation laws and the fact that most of central Rome is of historical significance. Without paved roads, early cities used to rise gradually on the build-up of dust, waste, and horse excrements. Rome has risen about 15-20 meters over the past 2000 years, thus preserving many remains. Until now, only two metro lines serve the 2.5 million residents, leaving the city's streets regularly clogged with motorized traffic whose pollution in turn endangers historical monuments. A few years ago, planners and preservationists decided to work together on the new subway line C, to be opened around 2014. Tunnel boring machines will be used more than 30 meters below the surface, which is below the archaeological remains. But the surface has still to be opened up at places for constructing stations and ventilation shafts. As museum space is limited in Rome, many of the objects to be excavated are destined to be displayed in the stations [10, 14, 26].
Exhibits in stations:
Amba Aradam-Ipponio station on Line C: To be opened around 2020: Rome is going to build "the world's first archaeological underground station" around ancient Roman barracks which came to light during the works.
Repubblica: Remnants of a Roman city wall throughout the station, partly behind glass.