I don't agree with this novel environment argument about routes. As a human, there are a limited number of roads that I have driven on. A taxi driver drives better than me because none of the routes are considered novel: the taxi driver has likely driven on every road in a city in his/her career. The self-driving machine has most definitely driven on every single road in the city, perhaps first as testing with human backup, then testing with no passengers, and finally passenger revenue miles.