Interlockingswerk

Interlockingswerk is a term used in railway signaling to describe a mechanical or electrical system that prevents conflicting train movements by ensuring that signals and points (switches) are operated in a safe and logical sequence. The primary purpose of an interlockingswerk is to avoid collisions and derailments on the railway network.

The core principle of an interlockingswerk is that it creates a dependency between different railway control elements. For instance, it ensures that a signal cannot be cleared to allow a train to proceed unless the corresponding points are set to the correct route and are locked in that position. Similarly, it prevents points from being moved while a train is occupying them or is about to pass over them.

Historically, interlockingswerk systems were purely mechanical, utilizing a complex arrangement of levers, rods, and cranks. These mechanical systems were housed in a signal box, where a signalman would manually operate the levers to control signals and points. The interlockingswerk mechanism physically prevented incompatible lever movements.

With technological advancements, electrical and later electronic interlockingswerk systems emerged. These systems use relays, microprocessors, and software to manage the logic and interlocking functions. While the underlying principles remain the same, modern systems offer greater flexibility, efficiency, and safety features, often integrating with other railway control and management systems. Regardless of the technology used, the fundamental goal of interlockingswerk is to maintain the safe passage of trains by guaranteeing that only one safe route is available at any given time.