radanvaihdon

Radanvaihto refers to the process of changing the track a train is on. This is a crucial maneuver in railway operations, allowing trains to move between different lines, enter or exit sidings, or pass through junctions. The mechanism that facilitates radanvaihto is known as a points or switch.

Points consist of two movable rails, called switch rails or points, that are hinged at one end. These switch rails can be moved to guide a train's wheels onto a specific path. When a train approaches a points, the switch rails are set to direct the train onto its desired track. If the points are not set correctly for the approaching train, it will derail.

The operation of points can be manual, where a railway worker physically manipulates a lever, or powered, typically by an electric motor. Powered points are common in areas with high traffic density or where remote control is necessary for efficiency and safety. The setting of points is usually coordinated with signaling systems to ensure that a train only proceeds when its intended path is clear and the points are set correctly.

Radanvaihto is essential for the flexibility and efficiency of railway networks. It enables trains to reach their destinations, allows for overtaking maneuvers on single-track lines, and facilitates the sorting of wagons in marshalling yards. The proper functioning and maintenance of points are therefore critical for the safe and reliable operation of any railway system.