Imagine you are driving your car on a foggy evening. There is another car in front of you driving at an acceptable speed. The driver of the car in front of you applies the breaks and you apply yours. You believe you have remained behind at what seems to be a safe distance and have slowed down at what seems to be an appropriate speed. However, you suddenly rear-end the car in front of you.

Think about what might have happened to your distance and speed perception and whether the fog had something to do with hampering your judgment.

Read the following two articles regarding the effect of fog on distance and speed perception: