What does the blue signal on train tracks primarily indicate?

The blue signal is an important safety indication within railway operations. It primarily signals that workmen are present on or near the track. This type of signal alerts train crews to the potential danger and ensures that they proceed with caution, knowing that personnel may be working nearby. The presence of workmen could entail various activities such as maintenance, repairs, or inspections, which require trains to slow down or stop to avoid accidents or injuries.

Understanding the significance of blue signals is crucial for maintaining safety standards and protecting both workers and passengers in the rail system. In this context, it emphasizes the shared responsibility of train operators and maintenance personnel to prioritize safety while working in proximity to active train tracks.