If Looking at the ground beside a moving vehicle helps you judge its?

Answer 1

I can also say that if you look out of the car window and see what you are passing by for example, different trees, buildings or other objects if they are near you then you will indeed be able to tell the vehicle in a moving state and at the speed.

Example: the car is running at 100 km/h which is quite fast. If you look up in the sky at the clouds then you will think it is moving slowly because the sky is so far away. But if you pay attention to the objects that on the ground proximal to the road like the buildings, street lamps then you can tell it is moving fast since all of those objects are near to you.

Answer 2

Speed