My score stayed at 100%, but today took a hit today for hard braking.
Stop light turned yellow at the worst time, had to break. I didn’t really break that hard though, so I know the braking is definitely sensitive.
View attachment 778906 it
View attachment 778907
That image shows only 39 km driven on the hard braking day.
I’m still not entirely clear how it works, but I think it would be better if you crank that up to 100 km thereby reducing the daily percentage for that day.
Then over your nine days you would get a tiny percentage for this day instead of a larger one because each day’s final results are averaged over the nine days.
In any case, you are fine the way you did it.
Just to be clearer, I believe each day’s penalty is averaged over the miles of that day, and then that already averaged-by-miles figure (if it can be made smaller with greater same-day-miles) is averaged over all days.
I’m not saying it’s logical, but it does give you the chance to reduce the overall effect of any single penalty.
If I am right about that, the reducing effect of more miles would only happen if they were driven without Autopilot… You would be reducing the hard-braking percentage of total time in that day spent braking while driving manually.
Also, you could avoid the issue by quickly engaging Autopilot on your approach to a stale green light, because it would be Autopilot doing the braking If the light dangerously turned yellow.
Final comment:
It is ridiculously complicated. You got a score of 98 for (daily) March 9 because of that one penalty. By manually driving more miles, you could make that score 99 (by reducing 2.1% to 0.7%), or conceivably even 100 (reducing 2.1% to 0.2%). I know this, because today I got a hard braking 2.7%, and manually drove an extra 48 km and it became 0.3% for the day, for a daily score of 99.