Most slab track constructions take place in tunnels where the ground is stiff and stable. The application of slab track in tunnels is very efficient in terms of construction, durability, strength and economy. The slab track can be built directly on the tunnel base and the thickness of the slab in many cases can be reduced compared to the slab track in earth structures (Lichtberger22). In addition, Esveld5 states that when slab track is applied in tunnels the drainage requirements, as well as vehicle access in case of calamities and safety issues, must be guaranteed. The available free space of the tunnel may influence the decision of the most appropriate slab track system.