The Ogulin–Knin line, also known as the "Lička pruga" (en. ""the Lika line"") is part of the railway connection between Zagreb and Split. , this line is being heavily upgraded with many sharp bends and grades removed in order to allow tilting trains to travel at nearly full speed on most parts of the track. Reducing travel time from Split to Zagreb by around a third, to 5–6 hours. This track was not intended as the shortest distance between Zagreb and Split. The line via Martin Brod which forms the border with Bosnia, has been closed to passenger traffic since the wars of the early 1990s.