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What you're describing is a reliability nightmare.

Human drivers 'depend' on road markings, but if some paint gets scuffed or a stop sign blows down in a storm, things still work okay. For AI cars to be similarly fault-tolerant, they need to be generally capable drivers who don't absolutely need exacting external markers to get around.

You can't pave roads with markers and beacons to do self-driving without simultaneously banning all non-AI traffic participants, including pedestrians.

fair point

unless... we all were antennas under our skin

alright Bill Gates

Absolutely. In the same way that we add street lights for humans, we will add waypoints for cars so they make less mistakes.