I hadn't paid attention that your bridge is on the grade. I ignored Dave's fine color coding. 
You definitely would have more flexibility if you used separate bridges, but then you would have to fuss with two lift-ups. Both of my tracks are level at the bridge site. As I worked my way around the room with the benchwork, I ended up with the second end 1/2 inch lower than the other. By the time I found it, I had put shelves in underneath and loaded them to make room to work. I had to jack up the left end and worked out the problem. For some reason, I like level bridges, though we see them at all angles in this part of the country all the time.
I was planning on making both of mine lift-ups for the reasons you state. There is plenty of head room. I don't think I am up to trying to gang two bridges to lift up together when they are separated by 6 1/2 vertical inches. Here are photographs of the temporary lift out I made, which shows the problems of having the two tracks at different levels. I just connect alligator clips to the wires from the rails. I just put screws into the sides of the table to align it. It is awkward to put in place as the alignment never quite works out, but the intent was a quick build until I can come up with something more substantial and permanent. Trains do go across both tracks fine.
