Kaunas is the key Rail Baltica junction, featuring an operational European standard gauge and the intersection of the 1520 mm and 1435 mm rail systems on the eastern coast of the Baltic Sea.
- This is the first European-gauge (1435 mm) rail segment in Lithuania, reaching Kaunas since 2021.
- The line allows freight trains to operate at speeds of up to 120 km/h.
- Trains run on the Kaunas–Warsaw route.