Hi, How big is the layout ?
Your "feeders" look to be ok, as long as you keep the same polarity (red and black) on the same track (inside or outside) consistently around the layout all should be fine.
I say, around the layout, as, if this is a DCC system, I suggest you add several more droppers around the layout to ensure a good electrical and data flow.
Some people like to "feed" every piece of track individually, but in my experience, every couple of feet (60cm) or so is sufficient. Some get by on less without issues, its your call, but I would definitely say do more than one feed point per circuit.