The '20s & '30s Modular Model Railroad club owns five corners, a filler module, a walk-through gate and a yard. In addition, transition modules connect the yard to the layout to allow trains on either main line to enter and exit.
The purpose of the filler module is that if an odd number of members' modules are available for a show, the filler can even the number to make a complete loop of track for continuous operation. The club's 90 degree corners have 38" radius track on the outer mainline.
To see photos, click on the links at the right. Keep in mind that many of the photos have backgrounds that have been added. The reason for this is that the modules have mainline tracks only inches from the front edge and very few have backdrops. At shows, backdrops would prevent the train engineers from seeing their trains in operation. Since seeing full-size people, convention centers and so on in the background would detract from the models, Bill has replaced them with sky and actual landscape images.