There is also a metre-gauge railway to Velestino, which is no longer used commercially. At the Thessalian capital Larissa, there is a 61 km branch line to Volos. North of Larissa, the line passes through a tunnel at Tempe. The picturesque line adjacent to the coast near Platamon at the northern end of Tempe to Katerini is now abandoned, though still visible. This section of the line provided passengers with unique views towards the mountains and sea as the train travelled along the eastern slopes of Mount Olympus to Katerini. Platy, north of Athens and 48 km to the west of Thessaloniki, is the point where the nation's two largest cities were first linked by rail in 1916. Trains between the two commenced operations in 1918, with the first through train service from Athens to Paris linking up with the Orient Express, which was inaugurated in 1920. At Platy, the line from Piraeus connects with the line from Thessaloniki to Kozani, Amyntaio and Florina. Larissa and Thessaloniki have substantial marshalling yards for both goods and passenger trains. Journey time between Athens and Thessaloniki can vary depending on the type of train selected. The stopping service regular train service takes 4 hours and 23 minutes, while the Express takes 4 hours and 10 minutes. When the ERTMS updates along the entire railway corridor are completed in 2020, the whole trip will take an estimated 3 hours. The main stations on the Piraeus–Platy railway are:  Some other stations of the line are Oinoi, Thebes, Livadeia, Tithorea, Leianokladi, Domokos and Palaiofarsalos. Although a railway line from Athens to the north had been planned since 1883, the first section from Athens to Demerli (current Palaiofarsalos railway station) was not opened until 1908. The two branch lines from Oinoi to Chalcis and from Lamia to Stylida were also opened in 1908. Subsequently, the line was extended towards the former Greek–Turkish border at Papapouli, between Larissa and Katerini. Finally in May 1916, the remaining section from Papapouli to Platy on the line from Thessaloniki to Monastir (Bitola) was opened. Major upgrades to the line had been planned since the late 1980s. The first upgrade was completed west of Oinoi in the early 1990s.