What does a green MAL bar indicate?

A green MAL (Movement Authority Limit) bar signals that the track ahead is clear for a distance of up to 3,500 feet. This indicator provides engineers with vital information regarding the status of the track, enabling them to proceed confidently and safely within the calculated limits. A green indication represents a favorable condition, allowing for optimal operation of the train without the need to slow down or stop immediately.

In the context of rail operations, having a clear understanding of these signals is crucial for maintaining safety and efficiency. Therefore, the green MAL bar assists train engineers in planning their speed and route effectively, ensuring they remain within the designated limits of the movement authority.