sequential (85) motor

https://kamchihau.blogspot.com/2022/10/httpskamchihau_17.html

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Ref: https://wodewangzhishime.blogspot.com/2021/08/airforce-cant-convoy.html. 

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Regarding the first picture,

1) A train send a left-turn signal to the control house.

2) The control house send a signal of rail-switch to the switcher.

3) The switcher switch to the right-rail.

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Me: If the control house is being hacked, if the rail-switch signal is being manipulated, accident can be made,

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1) https://en.m.wikipedia.org/wiki/Wenzhou_train_collision

2) https://en.m.wikipedia.org/wiki/2023_Odisha_train_collision

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Me: No, . . The above 2 links mention 2  hackers-made train crash. . One was in China. . One was in India. . Both trains encounter a wrong switching. . Consequently, they collide with a static movement train , or, they collide with a  dynamic movement trains. . 

John: If they collide with a dynamic movment trains, the impact is even stronger.