Budapest–Belgrade–Skopje–Athens railway

The Budapest–Belgrade–Skopje–Athens railway, a China-CEE hallmark project (2014) of Beijing’s Belt and Road initiative, is a planned railway international connection in Central and Southeast Europe – between Budapest (Hungary), Belgrade (Serbia), Skopje (North Macedonia), Athens and its China-run port of Piraeus (Greece). Planned speed is up to 200 km/h (120 mph) depending on the sections: 160 km/h (99 mph) on the Hungarian section between Budapest and Serbia, 200 km/h (120 mph) between the Hungarian border and Belgrade and on most of the Belgrade-Niš section, while the current line between Thessaloniki and Athens is 200 km/h (120 mph) with upgrades to 160 km/h (99 mph) ongoing.

Source: Wikipedia — Budapest–Belgrade–Skopje–Athens railway (CC BY-SA 4.0)