What does the term "crossing signal" refer to?

The term "crossing signal" specifically refers to a warning device that alerts drivers and pedestrians about an approaching train at intersections. The primary function of crossing signals is to enhance safety at railway crossings. These signals can take various forms, including flashing lights, bells, and gates that lower to prevent vehicles and pedestrians from crossing the tracks when a train is imminent. This system is crucial in preventing accidents and ensuring that individuals are aware of potential hazards at intersections where roads and railways meet.

Other terms, such as speed limits or safety protocols for engineers, do not align with the specific role of a crossing signal, which focuses on warning about approaching trains. Similarly, while devices that monitor train arrivals are important in rail operations, they serve a different purpose than that of crossing signals.