[datguacdoh]

The answer is probably that this isn't real. A self driving car with better vision, perfect attention, and instant reactions won't get itself into that kind of situation. And in any other case where an accident is unavoidable, the answer is to just hit the brakes because it won't matter anyway.

[allendoerfer]

Another benefit will be that the self-driving car behind you will also instantly hit the brakes and won‘t cause you neck trauma, making this option a little bit more appealing than it is right now.

[rimliu]

There is no need for self-driving cars to have emergency braking assist.

[rimliu]

Also, it has about zero understanding of what's going on. And it also has the same laws of physics acting on it. Zero reaction time does not translate to zero braking distance. People understand the world around and can make predictions which gives them time to react.