Roads are generally marked, and often have elements embedded in the surface (e.g.
[1]). As self-driving cars become more prevalent, I don't see why you wouldn't adjust new/replaced markings to be something more readable by those vehicles. It obviously can't be the only signal used (because it's infeasible to change everything immediately, not all roads are marked, and wear/damage may make them unusable) but it may help improve reliability/accuracy.
> This is about as feasible as putting smart chips in all roads so that cars know where the lanes are.
Lanes are marked, usually. So why not embed something like an UV/IR-only color pigment in the lanes? Invisible so it doesn't affect human drivers but can easily be picked up by cameras.
