The Real Bev wrote:
> wtrplnet wrote:
>
> > "Old Wolf" > wrote:
>
> >> Can I save gas by following behind another car?
> >> Or is it worse because I'm driving through his dirty air?
> >> Or no appreciable difference either way?
> >
> > Following a car won't help much unless you are so close that it would be
> > extremely dangerous. Following a large truck at highway speeds will make a
> > difference if you are about five car lengths or less behind (from
> > unscientific observations), again way too close to be safe.
>
> Remember, though, a car can stop WAYYYY faster than a truck. The
> problems with following a truck closely are (1) you can't see the cement
> block in the road that the truck with its high ground clearance didn't
> even notice; and (b) the fumes make you dizzy.
> >

<snip>

> --
> Cheers,
> Bev
> 1010101010101010101010101010101010101
> What do you think you're doing, Dave?
> -- Hal 9000

The problem is the reaction time. If a TT bombs his brakes while you
are only 5 cars back, you will impact him just about the time you
manage to get your foot on the brake.

Harry K