Where is the Rail shoulder used

Location: The railway shoulder is located on the outside of the railway track and is part of the width of the track structure. It is usually kept at a certain distance from the edge of the track to ensure the safety and stability of the train.
Features:
Supporting role: The railway shoulder can support the track structure to ensure the geometric size and stability of the track.
Drainage function: the shoulder design has a certain slope, which helps to drain water and prevent rain from accumulating on the track, affecting the safety of the train.
Safety buffer: When the train derails or other accidents occur, the railway shoulder can provide a certain buffer effect to reduce the consequences of the accident.