From Signals to Screens: The Evolution to Computer-Based Interlocking (CBI)
Modern systems are moving from relay-based geographic interlockings to Computer-Based Interlocking (CBI). CBI uses software and commercial off-the-shelf hardware to control switches and signals. It is more flexible, requires less physical space, and is easier to maintain and upgrade. It forms the brain of the signaling system, processing data from trackside equipment and issuing movement authorities to trains.
FAQ:
Q: What replaces the physical signal with CBI?
A: While trackside signals are often retained, the primary interface for the train driver can become a screen in the cab displaying movement authority and speed limits, especially in newer systems like ETCS.
Q: Is CBI safer?
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