Where Tesla differ from other manufacturers offering advanced driver assists is that Tesla allows a fair length of time without driver input. After a few seconds, the Nissan Leaf 2 warns a driver if their hands are off the wheel. Tesla gives the driver a lot longer. Mercedes Benz monitors the driver's eyes, and if they are not on the road it gives a warning then slows down.
Seemingly, all the Autopilot does, on highway driving, is steers between clearly defined lane markings and maintains the gap from the vehicle in front. It is not meant for city driving. Another thing, which should be no surprise when you think about it, is it disregards stationary items in front of the vehicle. This is common to all these driver assist systems. They have to, otherwise the car would slow down and stop every time it came to a flyover.
Tesla's Autopilot, Nissan's Propilot and Mercedes Benz Drive Pilot, among others, are in no way Autonomous, just Advanced Driver Assists. Until drivers realise that they will continue to kill themselves and others on the roads