Of course at least in the first few years, trains are going to be few and far between so signals aren't going to be particularly important - a train simply slows when approaching a switch or other danger area long enough to do what's needed/verify it's safe to proceed and then move on.
You might see some very strict timetables initially to minimise the problem of limited signalling too.
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If it moves, shoot it, if not push it, if it still doesn't move, use explosives.
Nothing happens in isolation - it's called "the butterfly effect"
Mors ante pudorem
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