Overcrowding becomes a problem when the safety of passengers and the train crew can no longer be guaranteed in an emergency situation. In an emergency, it is critical that everyone can evacuate quickly. If the aisles of a train are blocked by luggage or passengers, this cannot be guaranteed. Consequently, staff are instructed to limit the occupancy of long-distance trains when passenger volumes are very high.
For the Gotthard Base Tunnel, there are increased safety regulations in force.