Andrew, take the image and all the relevant text from the article. This is something my dad explained to me when I first learned to drive. Look at the crushed front end of the car and think about how much energy it took to cause that damage, and then remember that you are wasting that much energy every time you stop from that same speed. People think nothing of gunning the gas to the next red light. They wouldn't be gunning the gas if they were driving down an alley with a brick wall at the end. I explain it this way. "Think about it - unless you're timing the light, you are headed for a certain stop whether it's a red light or a brick wall. So why rush on to suffer such a loss? Less speed means less energy lost, and who knows - you may catch the light as it turns green."