What does a blue signal signify?

A blue signal indicates that workmen are on, under, or between rolling equipment, ensuring safety for maintenance or repair activities. This signal serves as a clear warning to train operators and other personnel that it is unsafe to move the equipment within the designated area. The use of this signal is part of safety protocols designed to prevent accidents and ensure the protection of workers when they are performing their tasks in proximity to moving trains.

In practice, the presence of a blue signal requires that train movements be halted until the signal is removed. This ensures that no train can inadvertently enter an area where work is being conducted, reflecting the importance of workplace safety regulations in the rail industry. Knowing this contributes to a dispatcher’s ability to manage train movements effectively while prioritizing the safety of personnel on the tracks.