This video clearly explains the history, mechanism and technical details of railway signaling system.
Thumbnail credit - Mr. Dinesh Rajapaksha(0716991881)
This video was originally uploaded to Hyper_FACT ( / hyperfact ) KZitem channel under the Creative Common License. Furthermore, I have personally contacted them and obtained their permission to republish the video in my channel.
Негізгі бет Sri Lanka Rail Traffic Control
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