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→Chain signals explained: removing advanced example that has no place in a section teaching the core function - it's just confusing newcomers
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'''Correct use'''<br>
There are two three main situation situations where chain signal should be usedsignals are needed:<br>
* ''At crossings'' to prevent train from blocking the crossing, if the train cannot continue beyond it. Correctly placed signals are '''Chain before''' the crossing and '''Block after''' the crossing. If the track after the crossing is empty -> the block signal is green -> the chain signal before the crossing is green. If the block after the crossing is occupied -> the block signal is red -> the chain signal before the crossing is red as well so next train won't enter the crossing thus it will not block the traffic on the other track. For instance, imagine the upper left track leading to an off-screen loading station, and the first train is waiting its turn. The second train will not enter the crossing (and block it) while it waits behind the first train, thanks to the chain signal.
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[[File:Chain_at_switch_red.png|345px]]
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'''Common mistakes'''
* placing the chain signal at the switch where train '''cannot''' choose any track (aka each track after the switch leads to different destination). The chain signal here will be useless and will work as less efficient block signal. <br>
