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 were completed in the early 1990s. In 1975, a program for a widespread updating of the rolling stock was launched. However, as it was decided to put more emphasis on local traffic, this caused a shifting of resources from the ongoing high-speed projects, with their subsequent slowing or, in some cases, total abandonment. Therefore, 160 E.656 electric and 35 D.345 locomotives for short-medium range traffic were acquired, together with 80 EMUs of the ALe 801/940 class, 120 ALn 668 diesel railcars. Some 1,000 much-needed passenger and 7,000 freight cars were also ordered. In the 1990s, work started on the Treno Alta Velocità (TAV) project, which involved building a new high-speed network on the routes Milan – (Bologna–Florence–Rome–Naples) – Salerno, Turin – (Milan–Verona–Venice) – Trieste and Milan–Genoa. Most of the planned lines have already been opened, while international links with France, Switzerland, Austria and Slovenia are underway. Most of the Rome–Naples line opened in December 2005, the Turin–Milan line partially opened in February 2006 and the Milan–Bologna line opened in December 2008. The remaining sections of the Rome–Naples and the Turin–Milan lines and the Bologna–Florence line were completed in December 2009. All these lines are designed for speeds up to . Other proposed high-speed lines are Salerno-Reggio Calabria, then connected to Sicily, and Naples-Bari. Rail links to adjacent countries All links have the same gauge. Austria — voltage change 3 kV DC/15 kV AC France — voltage change 3 kV DC/25 kV AC or 1.5 kV DC Slovenia — same voltage Switzerland — voltage change 3 kV DC/15 kV AC (plus two narrow gauge lines, same voltage) Vatican City — no electrification San Marino — closed, narrow gauge Stations on the border are: Roma San Pietro is the border station of the Rome-Vatican City railway Ventimiglia is the border station on the Genoa-Nice main line. Olivetta San Michele and Limone Piemonte on both sides of the Tenda Railway