I don’t think self driving cars will be common until the roads are built specifically for that purpose. [u/NDZ188](https://www.reddit.com/r/explainlikeimfive/comments/spl4ec/eli5_what_makes_self_driving_so_hard/hwfx6p5/) gives a pretty good rundown of some of the difficulties. I don’t see most of those being solved until we build roads that computers can understand. Things like lane markings and stop signs would have to identify themselves to the car computers.
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