How can speed and bends be combined?
In a bend, the train is subjected to centrifugal force and has to slow down to preserve passenger comfort. Mechanisms exist to enable the train to maintain high speeds in curves.
In order to maintain high speed in the bends while ensuring passenger comfort and safety, it is essential to tilt the train in the curves to compensate for centrifugal force. Several mechanisms come into play here: the elevation of the external rail and the tilting of the car body. Nevertheless, it is essential to find the right ratio between inclination and speed so as not to create an imbalance between felt movement and visualised movement, which could make the passengers sick.