You don't need much. Just put some gates up that slide open when the train comes to a stop.
You don't need much. Just put some gates up that slide open when the train comes to a stop.
When the gates slide open, openings are created. The doors of the subway would need to line up with those openings.
When the gates slide open, openings are created. The doors of the subway would need to line up with those openings.
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