* placing the chain signal at the a switch where train '''cannot'that doesn'' choose any track t offer a true choice (aka each track after the switch leads to a different destination). The chain signal here will be useless and will work as less efficient block signal, since each train will choose the track leading to its destination, ignoring the other track. <br>

* placing chain signal at the ''exit'' track of the crossing. There is absolutely no harm in doing so, but the train will needlessly wait for whole another block to be clear while it could have been moving already - it is harmless but very inefficient use of the chain signals.