🚆 Railways & Public Transport · Network
Railway Signalling and Train Control Network
How a modern railway signalling network is connected: interlocking at stations, track circuits, train control radio and the central traffic control centre.
Drawing diagram…
What this diagram shows
- Interlocking at each station prevents conflicting routes
- Trains get movement authority over train control radio
- The control centre sees every train on one display
Prompt used
Network for railway signalling: the central traffic control centre connects over an optical fibre network to electronic interlocking systems at stations. Each interlocking controls signals, points and track circuits or axle counters in its area. Trains carry onboard train control units (Kavach-style) that talk to stationary units by radio to get movement authority and enforce speed limits.
Mermaid code
flowchart LR CTC[Central Traffic Control] --- OFC[Optical Fibre Backbone] OFC --- EI1[Station A Interlocking] OFC --- EI2[Station B Interlocking] EI1 --- SIG1[Signals and Points A] EI1 --- AC1[Axle Counters A] EI2 --- SIG2[Signals and Points B] EI2 --- AC2[Axle Counters B] EI1 --- SU1[Stationary Train Control Unit A] EI2 --- SU2[Stationary Train Control Unit B] SU1 -.radio.- LOCO1[Onboard Unit - Train 1] SU2 -.radio.- LOCO2[Onboard Unit - Train 2]
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