The Rome Metro, known as the Metropolitana di Roma, is an important component of the Italian capital's extensive public transportation system. Inaugurated on February 9, 1955, the Metro has since become a vital lifeline for the bustling metropolis. The metro consists of three lines – A (orange), B (blue) and C (green) – which operate on a 60 km route, serving 73 stations. The original lines in the system, Lines A and B, form an X shape with the lines intersecting at Termini station, Rome's main railway station. Line B splits into two branches at Bologna station. The third line opened in 2014 and connects to the rest of the system via an interchange with Line A in San Giovanni. The Rome Metro is not only a practical means of transportation but also a showcase of the city's rich history and culture. Many metro stations have archaeological exhibitions, giving passengers a glimpse of Rome's past as well as its present.