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Surely there is an automatically activated manual overide - just like cruise control - but I guess if the "driver" is busy making lunch, doing a makeover or using social media - they'd be incapable of a decision or in fact any awareness !
Not to mention user selectability (turn it off on country roads) and yet further some user defineable options and parameters.
I regularly work with some fairly sophisticated machines that in theory only have known conditions to deal with - when an unforeseen error occurs - eg broken wires, faulty sensor, stuck relay, broken input/output etc - it can be pretty funny to see what happens when the PLC encounters an error the programmer never considered.
The usual issue is an immediate stop or shutdown and a meaningless error message - That wouldn't be so funny in a motor vehicle travelling at 110kmh on a windy outback road with fog, roos, fallen branches at night !
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