I have parallel tracks(A and B). On Track A I have a Trigger that I use to trigger multiple signals. When a train is on Track B and passes through the Trigger radius does the Trigger trigger or do I need another Trigger on Track B?
As with all trackside assets it can only see the track the asset is on. So your track B is not effected by triggers on track A. Radius only applies to distance along that piece of track or to a point that the track section ends.