of music established in 1807, currently Italy's largest with more than 1,700 students and 240 music teachers. Transport Milan is one of the key transport nodes of Italy and southern Europe. Its central railway station is Italy's second and Europe's eighth busiest. The Malpensa, Linate and Orio al Serio airports serve the Greater Milan, the largest metropolitan area in Italy. Azienda Trasporti Milanesi (ATM) is the Milanese municipal transport company; it operates 5 metro lines, 18 tram lines, 131 bus lines, 4 trolleybus lines, and 1 people mover line, carrying about 776 million passengers in 2018. Overall the network covers nearly reaching 46 municipalities. Besides public transport, ATM manages the interchange parking lots and other transport services including bike sharing and carsharing systems. Rail Underground The Milan Metro is the rapid transit system serving the city and surrounding municipalities. The network consists of 4 lines (plus one under construction), with a total network length of , and a total of 113 stations, mostly underground. It has a daily ridership of 1.15 million, the largest in Italy as well as one of the largest in Europe. Suburban The Milan suburban railway service, operated by Trenord, comprises 12 S lines connecting the metropolitan area with the city centre, with possible transfers to all the metro lines. Most S lines run through the Milan Passerby railway, commonly referred to as "il Passante" and served by double-decker trains every 4/8 minutes in the central underground section. National and international trains Milan Central station, with 120 million passengers per year, is the largest and eighth busiest railway station in Europe and the second busiest in Italy after Rome. Milano Cadorna and Milano Porta Garibaldi stations are respectively the seventh and the eleventh busiest stations in Italy. Since the end of 2009, two high-speed train lines link Milan to Rome, Naples and Turin, considerably shortening travel times with other major cities in Italy. Further high-speed lines are under construction towards Genoa and Verona. Milan is served by direct international trains to Nice, Marseille, Lyon, Paris, Lugano, Geneva, Bern, Basel, Zurich and Frankfurt, and by overnight sleeper services to Paris and Dijon (Thello), Munich and Vienna (ÖBB). Milan is also the core of Lombardy's regional train network. Regional trains were operated on two different systems by LeNord (departing from Milano Cadorna) and Trenitalia (departing from Milan Centrale and Milano Porta Garibaldi). Since 2011, a new company, Trenord,