a good way to save gas energy is to anticipate a stop and slow down accordingly so you don't turn your expensive gasoline energy into heat on your brake-pads and wear on your tires. BUT... if you try the morons will race around you in a huff, cut back in front of you, slam on their brakes at the light and ruin your roll through the light.
And a few of those morons will do that. And that's okay; I'd rather have those clowns in front of me where I don't have to worry about them. I anticipate stops constantly. I keep an eye on how much space in front of my car AND behind AND how long light has been green ( or red ).
Hi Featherfoot: Another add on to coasting into a slow down is to "Smart Brake" which means use your brakes to slow early but not entirely so that your are still gliding to and through the impediment. Not a stop sign but a light or slowdown in traffic ahead. Wayne