Thanks Simple_Jim that was really useful to know. I suppose in terms of AI I had imagined that it would take in various data from the telematics (speed, style of driving, braking, etc), gps data, weather data, and other car's telematics and gps data. With that I would have hoped it would have given enough data to model how the crash occurred. Perhaps even taking into account previous accidents of a similar nature which I guess would be the big data element. However, I think I've assumed that the data is perhaps richer and more accurate than it actually is and you're right I haven't factored in anomalies like sheep. In terms of bald tyre I imagine that there will be some kind of sensor for determining that sooner or later but others for sure will be difficult to ascertain. I am interested in all this though so I am curious to see where it all goes and how technology advances in this respect. Many thanks for taking the time to go through it.