"The Natural Philosopher" wrote in message
...

On 06/06/16 15:21, Roger Mills wrote:
That would only be useful if it had an accurate way of measuring speed.
If it uses the car's speedometer it will always control to a lower speed
than you want.

Alol ways taht uise car tuyres will be inaccuratye die to trye qwear if
nothing else.

Please remove finger from arse before typing. TIA.


Short of Doppler radar or similar I cant see anyway to measure a cars speed
accurately apart from GPS.