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Insulate both rails at the frog end of the diverging route of both turnouts. Use an Atlas Contoller or similar electrical switch to change the polarity of the diagonal track to that of the turnout. This will work in both DC and DCC. I use this setup and it works fine. I have a small printed notice next to the controller to remind me of how the slide switches need to be set, depending on which turnout the train enters from. <br /> <br />You can also buy an automatic device to change the polarity of reverse loops, etc. but it only works with DCC. <br /> <br />John Timm
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