Nuvi 40 Routing Choices
Discussion
Picked up a Garmin nuvi 40 when I noticed one cheap, mainly for long journeys where using Sygic on my phone isn't ideal and when I venture into France. Gave it a test on a route I drive regularly to test the unit.
The route it gave me was very strange, it tried to send me the long way round, just to join the motorway for 2 junctions, I presumed it was because it doesn't know any other conditions other than speed limits and that route in it's brain is a few seconds quicker, so sends me that way. But after leaving to route it told me to go, after re-calculation the ETA fell by 30 seconds and still tried to send me a different route to the quickest. After the 2nd re-calculation as I deviated from it's route again, the ETA fell by about 10 seconds.
How come it routes me like this? I could understand the routing choice if the first route was the quickest (even by a few seconds), but it's not, and it knows that, by the adjusted ETA. The routing method is set to fastest (not shortest).
The route it gave me was very strange, it tried to send me the long way round, just to join the motorway for 2 junctions, I presumed it was because it doesn't know any other conditions other than speed limits and that route in it's brain is a few seconds quicker, so sends me that way. But after leaving to route it told me to go, after re-calculation the ETA fell by 30 seconds and still tried to send me a different route to the quickest. After the 2nd re-calculation as I deviated from it's route again, the ETA fell by about 10 seconds.
How come it routes me like this? I could understand the routing choice if the first route was the quickest (even by a few seconds), but it's not, and it knows that, by the adjusted ETA. The routing method is set to fastest (not shortest).
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