J. Richard (Dick) Kerr holds a Ph.D. in Electrical Engineering from Stanford University, and is a retired infrared, laser, and avionics systems engineer. He has authored over 60 scientific and engineering papers, and has been granted 10 patents. During his career he has been a professor, Graduate School president, engineering manager, and entrepreneur. Starting with an early childhood interest in model railroading, Dick has been fascinated with the idea of providing truly realistic, automatic signal operation that far exceeds the capabilities of commercially available toy train and scale model commercial units. Having (partially) retired, he has spent much of his time fleshing out these ideas in great detail, including testing on his own model train layouts. Many years have passed since the first motivation for these concepts, and he hopes that their final exposition will bring pleasure to- and stimulate the creativity of - others in this challenging and timeless hobby.