Or when your car decide there is a threat In front (even when there is nothing on the road), and do a hard brake for you, then you will be rewarded a front collision warning.I'm sure that in addition to the score, there must be some minimum mileage or driving frequency. Driving around the block once and then parking it for 3 weeks doesn't seem like it would get you in.
I have no idea how people can drive in the city and maintain 100/99. I drive so carefully, and all it takes is one corner or one person cutting me off to get it bumped to 95.