Quickly and safely through mountains and urban areas

Modern railway tunnels have separate tubes for each direction of travel, safety and ventilation systems conforming to the latest standards, slab tracks for higher operating speeds, sometimes smoke extractions systems, etc.



Higher design speeds demand larger cross-sections and therefore more complex construction processes. At the same time, budgets become tighter and construction times shorter. On the other hand, thanks to progress and the latest technological developments in underground construction, railway lines can now also be built in geologically challenging subsoil.


Railway tunnels built more than one hundred years ago as pioneering achievements have significantly influenced our knowledge. However, today these structures often do not comply with current regulations. Therefore, these structures need refurbishment in order to meet these regulations. Also, the use of new or different rolling stock might demand higher clearance profiles or the implementation of higher standards for passenger rescue and evacuation. Last but not least, during the planning phase, considering that construction works have to be carried out under continuous operation, is a must.