Line 800 is one of CFR's main lines in Romania, having a total length of 268 kilometres (167 miles).

The main line, connecting Bucharest with the Black Sea coast at Mangalia, passes through Fetești, Medgidia, and Constanța.

[1] This railway line was upgraded and since July 2014 trains can run on most distance with a speed of 160 km/h (99 mph) for passenger trains,[2] and 120 km/h (75 mph) for freight trains.

The fastest passenger trains can cover the distance of 225 km (140 mi) between Bucharest and Constanța in less than two hours.

[2]