Quote:
Originally Posted by TexasSP
So many factors affect how your eyes gauge speed, you can never use them realistically as to determine it. This was something I had a conversation about with my brother (who is a cop) and some of his cop friends several years back. They were discussing how impossible it was to accurately tell a vehicles speed just watching and how most of the time there guesses were way off when compared to the radar readings. Things they said affect it greatly is other traffic on the road, trees and height of them, road width, weather (clouds, sun , etc), time of day, and noise level around and from the vehicle.
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It is true. Ever wonder why in a go kart you seem to be going really fast even if you are doing 50mph? Anyone can try this out. Go to your local go kart track (If you have one near by and if they allow such speeds) and get to 50mph. After that when you go home compare that to the 50mph in you real vehicle.