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High Capacity Signalling is the high tech system used to run trains in turn-up-and-go rail networks across the world.

It enables trains to automatically adjust their speed to keep a safe distance from the train in front - like adaptive cruise control in cars - which means services can run closer together and more frequently.

High Capacity Signalling will allow for more trains, more often through the Metro Tunnel and on the busy Cranbourne, Pakenham and Sunbury lines from 2025.

Signalling is like your body’s nervous system – it’s not something you can easily see or touch, but it’s essential for trains to function.

Learn more about High Capacity Signalling.