By my reckoning, I have driven in at least 9 countries other than the one I actually live in (UK). I would hate to think that by failing to observe some local rule of the road, which I may have momentarily forgotten or not even known about, I might have caused an accident.

In the case of Mrs. Sacoulas it would be interesting to know, for example, whether the car she was driving was left- or right-hand drive.