It's still in the testing phase sir... and i am not sure what you expect when you question no has rear ended the cars??? you want a mile by mile report from google isn't it too much to ask for from a company which is just testing its new product focusing on making it a more safe car to use. you want them to maintain a driving book for this i don't wanna go on with this... let hope they manage to make a really nice and safe car in the end.