The purpose of most signage and road lines is to decrease ambiguity (Are there three or four lanes here? Which is better for a left turn?) and increase throughp

The purpose of most signage and road lines is to decrease ambiguity (Are there three or four lanes here? Which is better for a left turn?) and increase throughput safely. If signage could be made less ambiguous in such a way that self driving cars benefit, that's a good thing. I think, however, that such a scheme should be based on single point of truth, ie. no QR-codes: The signage that a human can read should be the same that the computer can read.