John,
To be honest, I didn’t put a lot of thought into where to place the double-crossover, I just wanted to get the yard tracks aligned. It probably makes more sense to put it in the middle so a switcher could move more than just itself.
The switches that replace it are more prototypical. I found an example in Philadelphia just to the right of the Girard Street Train Bridge, but it’s in a park, so you have use the satellite view to see it. Each crossover is by a light tower.
The bigger thing though is that I believe double-crossover switches are best used where speeds are slower. I’ve read posts saying they can be troublesome too, but I have no experience with them. Also, note that I used 11° switches to make the crossovers because the #8 switches Tom suggested are just too darned big and raised the grades to over 3%.
And before you ask, since the top yard track is for engines to access the TT and not for car storage, I didn’t add a crossover to it. I did move it further away and reoriented the TT/RH. There’s also no way to add a crossover to the middle 2 tracks coming off the 4-way because they’re too close. I even added the 4th straight lead to the RH area so you can park a large engine outside on the track next to the RH.
