In other words, what you're saying is "drive slow". What needs to be
realised here, without getting into an argument about who's right and
who's wrong, is that people will go over the speed limit - be it a
little or a lot.

So, for those who want such a device, help them out for the sake of what
this PIClist is about, rather than preaching about what is deemed
appropriate motorist behaviour. Fair enough?

Adios,
LarZ

---------------  TAMA - The Strongest Name in Drums  ---------------

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Russell McMahon
Sent: Sunday, 4 November 2001 7:38
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: =%5BPIC%5D%3A Speedtrap warning device using any GPS
receiver.

> What is it that you plan on doing with the GPS?  How is the GPS
supposed
> to warn you of a speedtrap?

One method is to use GPS to derive speed across ground (taking account
also
for elevation) and ensure that your velocity vector never exceeds the
local
speed limit. You could also map speed limit boundaries to determine the
appropriate change points.

Generally intelligent application of a speedometer, brain and eyes works
well enough already. It's a cheap solution (as most systems are already
equipped with all the components) and it can provide an almost 100%
success
rate against speeding, let alone speeding tickets. From what I've heard
it's
FAR more successful at achieving a lack of speeding tickets than the
results
reported by people using RADAR / LIDAR detectors.

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