Railway Signals
Railway signalling is a highly specialised topic. Some examples are illustrated here for the curious, with the intentional aim of piquing the layman's interest, so that they might fully grasp how complicated and particularly delicate it can be to operate in this sector, where even the smallest error could have catastrophic consequences, as well as appreciate the extreme professionalism that is so often concealed by ordinary, everyday normality.
The complexity of the topic is revealed by reading the manuals preserved in the museum’s Library room.