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| Question about signal lights on the 7 and trip arms (1509966) | |||
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Question about signal lights on the 7 and trip arms |
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Posted by JRR4 on Sun Apr 14 15:22:52 2019 I have only seen videos of the signal lights (green blinking mostly) since the 7 was upgraded. What do the signal lights mean now? Also, how does a trip arm know when a train has completely passed so it can pop back up? Thanks! |
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