“A diesel locomotive has my ideal user interface[1].”
Shows locomotive cab controls as an ideal physical UI
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A diesel locomotive has my ideal user interface[1]. (a) For non critical operations, it has smart displays similar to an airplane cockpits. Physical function keys perform different things depending on the screen the smart display is presenting. (b) For critical operations, physical switches and levers are clearly labelled to show what they do,. I would say the best UI is one where you can talk someone through an emergency over the phone. e.g., "Mayday. Help. The locomotive engineer just passed out and I don't know how to stop this thing." "Are you sitting on the right seat? The operator's seat? Look to your left, you will see two blue levers marked throttle and dynamic braking etc." [1] this video (skip to the 20 minute mark)