you can break it down to various expert-system subproblems

- perfect cv image classification (+ low visibility )

- anticipating behavior of bikers, children, elderly, animals, near roads

- responding to human non-verbal communication

- responding appropriately to never before seen obstacles/scenarios without being a nuisance on the road or endangering other drivers

- vehicle dynamics (+ in rain, ice, snow, emergency etc)

...

I would guess to do these tasks with accuracy similar to humans approaches a problem space that's as difficult as general AI

some of these seemingly require the machine to have theory-of-mind which is general AI