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Reference.org
Transmission-based train control
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<p>Transmission-based train control (TBTC) is a communication technology protocol used in <a href="/facts/Railway_signalling/yK37bHt7">railway signaling</a>. It encapsulates all railway signaling methodologies or frameworks that rely on the communication between the control room, trackside systems and onboard systems to ensure safe train movements. </p>