Earlier quoted context omitted.
There are millions of miles of roads just in the US that will never have that sort of infrastructure because the cost of keeping beacons running and marking in place would be astronomical. Sure maybe California will have some of that around big population areas but that's probably about it. What happens to all these markings when it snows a couple centimeters?' Fully self driving cars won't happen in our lifetime, pr…
its not only lines on the road though: Imagine you are following a pickup-truck and out of the back an obviously empty box floats out of the bed and lands directly in front of your car. For a human its trivial to know the box is empty and its ok to hit it....does "AI" know that? Multiply that case x1000 and you have the conditions self-driving cars will need to handle on a daily basis.
This is a great anecdote that definitely needs a source to back it up.
Primarily, there are a significant number of single vehicle accidents caused by drivers jerking the wheel instead of acting in a calm manner.
Secondly, there are many cases where a box is not safe to ignore; that could mean it damaging a fog light, a large staple in it hitting a tire, or it getting stuck somewhere, temporary loss of traction or visibility.
In conclusion; anything on the road should be treated as something to avoid, but definitely something to avoid a high speed collision with.
Other Anecdotes to consider: The first model S firs was caused by a trailer hitch in the road. Hammer hit a model 3. Asphalt coming loose in slabs and hitting a driver. Mattresses and ice from the roof in front of you. Tldr; There are many accidents that do happen with human drivers.