However good your driving, you can’t account for other people’s behaviour. But you can improve your chances of staying safe. First of all, ask yourself “is this journey absolutely essential?” If you’re aware that fog is a risk, the safest thing to do is to avoid it altogether. Postpone your journey. The chances are that you’d get delayed in fog anyway, so is it really worth setting out? Obviously that only applies if you have an inkling that fog is a threat. Quite often it can appear as if from nowhere – so you need to make sure you know how to drive in fog. That starts before you leave.