Hi mummert,
You may wan to consider using a righthand turnout instead of the left in the front of the first photo. You are setting your trains up for a bad S-curve coming down grade and then onto the branch, or main, whichever it is.
Also, the track to the yard coming from under the 3rd bridge should have a left-hand turnout (the points are away from camera) that can go straight and connect with the area with the bunch of cross-overs just left of the yard. That will give you a nice long siding and drill track for engines working the yard while still keeping the main, or branch, open.
Hope that helps