While this comment is strictly true. Once self driving cars become common in cities, cities will start modifying roads to be more accessible to self-driving ca

While this comment is strictly true. Once self driving cars become common in cities, cities will start modifying roads to be more accessible to self-driving cars. This will result in "close to perfect" self driving cars in urban areas within a decade or two. On the other hand, driving on remote country roads in ice storm conditions is something that self driving cars are never likely to be ready for, at least until tires come with automatically deployable half inch studs.