Po (river) 70,000 in Italy, of which 41,000 is in montane environments and 29,000 on the plain. The Po is the longest river in Italy; at its widest point its width is . The Po extends along the 45th parallel north. The river flows through many important Italian cities, including Turin (Torino), Piacenza and Ferrara. It is connected to Milan through a net of channels called "navigli", which Leonardo da Vinci helped design. Near the end of its course, it creates a wide delta (with hundreds of small channels and five main ones, called "Po di Maestra", "Po della Pila", "Po delle
Rail transport in Italy Italy. High-speed trains were developed during the 1960s. E444 locomotives were the first standard locomotives capable of top speed of , while an ALe 601 electrical multiple unit (EMU) reached a speed of during a test. Other EMUs, such as the ETR 220, ETR 250 and ETR 300, were also updated for speeds up to . The braking systems of cars were updated to match the increased travelling speeds. On 25 June 1970, work was started on the Rome–Florence "Direttissima", the first high-speed line in Italy. It included the bridge on the Paglia river, then the longest in Europe. Works