Humans would also improve with removed signage.  There&#x27;s quite a bit of research now that accident rates go down the more you remove street furniture and lines.  Same with traffic lights - see the caution people use when the lights are out of order.<p>I&#x27;d hope that a self-driving car has the meta data on board rather than just relying on seeing the sign.  I&#x27;d also hope that they&#x27;re designed to treat <i>all</i> junctions with caution, not just those with missing signage.