Even after self-driving cars conquer the planet, how do you think they'll figure out that they're in a construction zone, if not road signs? More seriously, St

Even after self-driving cars conquer the planet, how do you think they'll figure out that they're in a construction zone, if not road signs? More seriously, Street View as lint for road signs would be a superb idea! It's probably not something that anyone short of Google would have the processing power to do, but it would help a great deal. (Assuming municipalities want help, that is. There are plenty of small towns that operate as speed traps, looking to shake down drivers by posting few speed-limit signs and many traffic cops. But lint-for-road-signs could reveal when an area has unresolved road-sign issues, and warn drivers to take another route.)