There have been multiple times where, despite my best efforts to pay attention, I couldn't even see a traffic altering incident in front of me. The car in front

There have been multiple times where, despite my best efforts to pay attention, I couldn't even see a traffic altering incident in front of me. The car in front of me, which was the only one I could see, did not prepare me quickly enough. Now, I didn't crash, but an advanced warning system can LIDAR/whatever under cars to see many cars ahead, warning me if three cars ahead are traveling at 0mph and I'm traveling at 70mph. Of course, safe driving distance is important there - I'm not claiming otherwise. It was my safe distance that made it possible for me to stop. This is entirely besides the point though, as my human senses were entirely letting me down in that situation. There's actually a good video of almost that exact situation by.. I think it was a Tesla. It started beeping with little visible reason why. Turns out, the traffic two cars ahead was at a stand still. I can see what you're saying about automation, but I still think it would be a net gain in most scenarios. Though, I imagine it would be best to let people turn that off, but keep warnings intact.