Is it not the first fully autonomous truck, if not vehicle, used in a "real life" scenario that is not just a closed-off portion of a street ? That is the real interesting point, regardless of the speed or the actual location.
These trucks are unmanned, with a remote driver who may or may not be paying attention but can take control at any time.
Also, the safety net inside the vehicle is clearly just for testing purposes, while the remote safety net is something that can be done in production.
"We where very surprised to see how many people intentionally jumped in front of the moving buses to see if they would stop"
My gut says that it’s more probable that it was the hacker news crowd trying to test the technology, but I have to admit to have absolutely no data to support this assertion, either.