Driving within the speed limit and avoiding jack rabbit starts after red lights also help improve gasoline consumption.

FORBES: Three Tips For Beating Rising Gasoline Prices

For instance, if one molecule approaches another, it will drift along at the same speed with no thought of avoiding a collision.

ECONOMIST: Traffic management: Desynchronised | The

It revealed only one of the Tornado GR4 pilots saw the glider and while taking avoiding action its effectiveness would have been marginal because of the speed the jet was going.

BBC: Tornado