Underground metro stations play a vital role in metro systems as part of daily urban transportation, providing the connection between the underground and the ground level and interchanging metro lines. The chosen subsystem railway infrastructure of the metro station is one of the final phases of a construction process which generally takes place when concrete works of subway stations are done.

The different subsystems are presented below:

The intervention time of the options are:

RR: Rail replacement = 28 years,
CS: Conventional phase 1 replacement = 50 years,
PR: Prefabricated slab track replacement = 60 years,
FPR: Fiber reinforced Prefabricaed slab track replacement = 40 years,
FER: Fastening elements replacement = 15 years,
M: Maintenance = 5 years

The maintenance timeline of the best performing option 2 is shown below.