GM had a prototype car a long time ago with a 'drive by wire' system (as I'm sure other manufacturers have had). There was a steering wheel but it wasn't conne

GM had a prototype car a long time ago with a 'drive by wire' system (as I'm sure other manufacturers have had). There was a steering wheel but it wasn't connected to any steering column/shaft. It just had sensors that recognized the actions and turned the wheels accordingly. A system like that could work where the steering wheel doesn't respond to the user when self-driving but is enabled when needed. Prevents accidental steering.