The ROCK 2.0 - Signals

So, I have been thinking about signals for the layout.  Initially, I would be interested in them only for the area around Ottawa and the BN Junction.  Later down the road, I might consider installing the Atlas  tri-light block signals.

Here's a quick diagram of Ottawa.  The RI mainline is double track with the BN crossing from the north.  To the right is the bridge over the entrance to the room.

Signal A & B - Burlington Northern Northbound/Southbound Signals

Signal C - Rock Island Eastbound Signal 
Note: I would have two signal heads for each track.

Signal D - Rock Island Westbound Signal

Between the BN Junction and Signal D is the duck under bridge for the mainline.