On 04/02/2016 14:33, T i m wrote:
On Thu, 4 Feb 2016 12:55:46 +0000, dennis@home
wrote:


Its constantly checking for quicker routes and will
indicate if there is one.
Is that in the event of a tectonic plate shift, the snow melting or
the tide going out?;-)

New/cleared traffic jams. I guess snow melt might do it!

Andy