Arrival Times - Never Correct - The Calculation Is ALWAYS Out.
I did an experiment on a long journey with my Start 50, staying at 70mph on the Motorway 250miles and the Arrival Time went up by 20mins. I would therefore have to break the speed limit to arrive at the time on the Sat Nav.
A setting to adjust the vehicle speed for 60mph on a 70mph road, 50mph on a 60mph road.
Comments
On my 400 I find that the destination time is varying all the time depending on the speed and traffic conditions.
To help for a 60/70 adjustment + 1/7th 50/60 + 1/6th etc to the time shown on the your unit.
This may answer your query.