On Sun, 05 Jun 2016 15:43:16 +0100, Roger Mills wrote:

Based on what? Does it use GPS technology and a speed limit database in
order set the correct speed for your location?

It certainly takes input from the satnav, but primarily (I think, based
on observation) it uses the front camera to recognise speed limit signs.
It puts the current limit (and other signs such as 'no overtaking') up on
the dashboard.

--
My posts are my copyright and if @diy_forums or Home Owners' Hub
wish to copy them they can pay me £1 a message.
Use the BIG mirror service in the UK: http://www.mirrorservice.org
*lightning surge protection* - a w_tom conductor