Another way to think is don't get up to a very high speed close to where you may have to slow down.
If you do you may have wasted some of that gas.

When it IS time to decide to slow down (whether using the brakes or coasting) wouldn't it be smarter to be going 35 instead of 45?

Also leaving a lot of space in front of you helps save gas cause you have more time to gradually slow down, and didn't waste gas to get up to speed to follow so closely.

Need fewer troops to support.
Drive a hybrid.
Best tank 71.65 MPG.

Before this car I spent two years learning hypermiling on my 2004 HCH1.