the short section of line from kaliningrad to kybartai in lithuania is the only part of the former eastern railway that still has an important function, as it is the transit route from kaliningrad to the russian heartland. it belongs to the kaliningrad railway and has been rebuilt to russian gauge. the station with controls at the lithuanian border is now nesterov, since the former border station at chernyshevskoye was completely dismantled after lithuania was annexed by the soviet union and border controls were abolished. russian railways now plans to rebuild the border station at chernyshevskoye because nesterov station does not provide sufficient capacity. the section from mamonovo ("heiligenbeil") until shortly before kaliningrad has a main track in russian broad gauge and formerly had a standard gauge track. while the broad gauge track follows the traditional route from the west to kaliningrad south station (formerly "königsberg hauptbahnhof"), the other track diverted south around the city and reached the station from the east.