Track substructure

The substructure of a rail track consists of ballast, subballast and subgrade, and comprises passageways and supporting structures (bridges, culverts, viaducts, subways, underpasses, overpasses), tunnels, galleries, level crossings, station facilities, and various track safety and security installations.

StructureNumberLength (km)
Tunnel 87 35.64
Gallery 5 0.56
Bridge, viaduct 435 12
Culvert 2900 6
Platform 372 44.6