sequential (82) motor

https://wodewangzhishime.blogspot.com/2021/10/disavowal.html

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Ref: https://wodewangzhishime.blogspot.com/2021/10/httpswodewangzhishime_39.html. 

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Me: Let me explain the above picture. . When the train approach the junction, the train send a signal to the control house. . What signal ?? For example, a signal of turning to the right-hand-side rail. . And then, the control house will send a signal to the switcher which switch the rail to the right-hand-side rail.

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Me: If hacker hack the control house, the train can't successfully swich to the right-hand-side rail. . However, hackers seldom hack a train in this way, because,

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Because,

1) When the train rail-switch, the train move slowly.

2) A slowly moving train can't create accident of "tragedy".

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Me: Accident of tragedy is based on the reality that the train is moving speedily.