Nice straight forward design that offers some interaction.
My initial concern is the amount of room you have to obtain the grade needed for you cross over. "General rule of thumb" is you need 100" of horizontal track to attain an X percent grade. In other words, for N Scale, to achieve a 1.75" clearance at the cross over (or just prior to it) you will need 100" of horizontal track with a vertical height (at the cross over) of 1.75" as well as a little more horizontal track to accommodate the transition for the grades up and down.
The "good news though" is this - A lot of people say that N Scale trains can negotiate up to a 4% grade. IF that is true, taking into account the engine type and number of rolling stock being pulled, you could achieve a 2% (1.75%) grade over only 50" (4') of horizontal track.
I think I'd move my turnouts back a little from the start of your curve, top and bottom. Most N Scale modern engines are around 5" - 5.5" in length so if you were to move the turnouts back into the straights about 6" from the start of the curve, I think you'd be better of and reduce the possibility of any potential problems.
Sorry to be a little bit picky, but better to have "possible issues" pointed out before things get started.