Hi all. I live in the Mid Hudson Valley, New York State. CSX just completed an update to their signals in my area, however I am not sure how they are being used to control the tracks. For example: At one point there is a left diverge off the main line. There is a new 3 light signal at this junction. Top light 3 aspect, middle light two aspect, and the bottom light 3 aspect. What are these covering ? I would think the top one is for the main line, the bottom for the left diverge, but the middle one ? If anyone can shed some light on this, no pun intended, please post. Thanks.