I imagine they will be self driving - you have seen how folk drive in 3D, let alone 4D... bodies and burning debris falling out of the sky...
So, self driving, which means passengers do not control the vehicle, in any way.
Not sure I would want to ride under those conditions...
Still, roads can be grassed over, and my horse and I will have a quiet ride, right off our property, no more trailering to places, where cyclists and atvs ruin the trails and folks unleashed, uncontrolled, dogs charging about.... 🙄