I think you could do it but you might need a transition piece at each end of your 3 ft section.We did this with our travel layout using 31 and 42 radius.You could always use a return loop on the centermost track which would save a little space.
Ed
Jake, What brand of track are you using?
Our community is FREE to join. To participate you must either login or register for an account.
Get the Classic Toy Trains newsletter delivered to your inbox twice a month