> I still haven't come across the placebo buttons though so I'm willing to doubt their existence. IIRC the "placebo" buttons, where they exist, were not instal

> I still haven't come across the placebo buttons though so I'm willing to doubt their existence. IIRC the "placebo" buttons, where they exist, were not installed as such, but simply deactivated after the traffic light control system changed, since uninstalling them would be more expensive.