TL <tlehman@visi.com> wrote:
> I agree. The signal would have been lost. I'm curious, though about
> the sensors you mention. My handheld simply extrapolates when it
> experiences signal loss, ie, continues in the same direction at the

That's why the automotive units cost so much ;-)

> speed from the GPS readings should be much more accurate than the

As long as they are available. The road sensors and turn indicators are
always "on".

Inertial navigation system in aircraft were pretty accurate long before GPS
came out.