What do green and yellow sections on the MAL bar mean?

The green and yellow sections on the MAL (Movement Authority Limit) bar indicate that the train is being routed out of the CBTC (Communications-Based Train Control) Mainline territory. In train operations, the MAL is a critical aspect of maintaining safety and efficiency, as it helps train crew members understand the extent and limits of their authority to operate the train.

When the bar displays green and yellow sections, it signifies a transition from an automated control system (like CBTC) to a different operational mode, which may require manual control or a change in how the train is monitored and operated. It serves as a vital alert to the train operator, indicating that they should prepare for the operational changes that accompany exiting the CBTC Mainline territory. Understanding these signals is crucial for safe train handling and adherence to operational protocols.