> I cannot imagine a database of signs that would be constantly up to date and somehow distributed to all cars on the road. Really depends on where you are. I

> I cannot imagine a database of signs that would be constantly up to date and somehow distributed to all cars on the road. Really depends on where you are. I agree I can't imagine it in the USA, but in the Netherlands, where every square metre is documented, attributed and zoned (yes including the leftover grassy triangle bits between highway ramps, everything). We could totally do that if necessary. I don't know if documenting all the traffic signs would be the right solution. If anything I would imagine this database to include way more virtual traffic signs than are actually there. Not for the legal traffic rules, but virtual ones that would be nice if they existed and everybody in the flock held to them. Point is that worldwide there is a huge variety in the quality of roads, the quality of signage, driving culture and attitude, and the general predictability of the environment. Some places will lend themselves more naturally to the first forms self-driving cars will take than other places that are more "free form".