How is self-driving a 2D problem when you navigate a 3D world? (please do visit hilly San Francisco sometime) not to mention additional dimensions like depth, velocity vectors among others.
The visual input and sensory input to the self driving function are of the 3D world but the car is still constrained to move along a 2D topological surface, it’s not moving up and down other than by following the curvature of that
So based on your argument they actually operate in 1D since roads go in one direction and lanes and intersections are constrained to a predetermined curly line.
The point is clearly that they don’t have a vertical axis of control, they can’t make the car fly up in the air unless they’re driving crazy taxi style
