Communications and Signals:Then and Now
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10:46
How To Read Trackside Signs & Markers
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38:10
Railroad 101: Signaling Systems
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10:40
Freight Train (1954)
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16:50
How Railroad Crossing Signals Work
![](https://i.ytimg.com/vi/cIQ0yIZgQeE/mqdefault.jpg)
25:13
How a Diesel-Electric Locomotive Works
![](https://i.ytimg.com/vi/MbSmoUH1Cqk/mqdefault.jpg)
5:47
How A Railway Frog Point Works
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15:18
Railroad Signals, reading and meanings, part 1: The basic three light system
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1:02:29