What does the green MAL bar indicate?

The green MAL bar indicates that the track is clear for up to 3,500 feet. This is a critical aspect of railway signaling that ensures safe operations by informing engineers and train crew about the track ahead. When the green MAL bar is displayed, it provides a clear signal that the path is safe for an extended distance, allowing for appropriate speed and train management within that distance.

The specific distance of 3,500 feet is particularly significant because it mandates a level of attention to both speed and safety, ensuring that engineers can proceed with confidence knowing that there are no upcoming obstructions within that range. This understanding is vital for maintaining operational efficiency and safety on the railway network.