The Rome–Cassino–Naples railway is a railway in Italy, the first of the three existing railway lines between the capitals of Latium and Campania to be opened when it was completed by the Società per le strade ferrate romane in 1863. The line is now fully electrified at 3 kV DC. It is now mainly used by regional trains, some trains to and from the Adriatic coast and a few night trains. The Rome–Naples high-speed railway line (which was largely opened on 19 December 2005) generally follows the same route.