At about sunset on a hot day, there is a thunderstorm and the air cools. A fog rises from the road. Air pressure lowers during a storm which causes rainwater on the road to evaporate rapidly to produce the fog. The fog forms over the road because that is where there is the most water. The rain had soaked into the ground other places.
Water evaporates rapidly from the road because it is still hot from before the storm.
Then the water vapor condenses into tiny droplets as it is cooled in the air above the road. Eating carrots will improve your vision. Many animals can see in the dark better than humans can. Some animals have a special layer at the back of the eye that reflects light forward so that it passes through the retina twice. Most animals see in black and white, seeing in color requires a different type for the cells in the retina.