| GPS-Data-Team.com
|
| Author |
Message |
jcdeb106
GPS: Garmin Nuvi 765T
|
 Posted: 02/02/2010 11:14am Post subject: Dual Routes |
 |
|
| On a recent trip to Moncks Corner, SC my 765T took me a shortcut via SC 178 but on the return trip it took me back through Columbia, SC. It was a confusing mess.
|
|
| Back to top | Link |
|
 |
Guest
GPS: Garmin Nuvi 765T
|
| Posted: 03/03/2010 12:51pm Post subject: Traffic perhaps the cause? |
|
|
Perhaps it rerouted due to traffic being enabled to make the choice for you?
MikieP
|
|
| Back to top | Link |
|
|
Red
GPS: Garmin Nuvi 765T
Guest
|
| Posted: 06/09/2010 10:57pm Post subject: Garmin has their little secrets |
|
|
And they don't like to discuss them because they might disclose some proprietary advantage to a corporate spy.
One of them SEEMS to be that the Nuvis have a prejudice for right turns over left turns. I have seen it create a route any number of times (to different places) where the Nuvi sends me "too far" and makes right turns to reach the destination, when the short and direct route would be just a little shorter--but require left turns, crossing traffic.
If you contact Garmin support and upload the specific route to them, they MAY be willing and able to tell you which "feature" is creating those puzzling routes.
I'm not sure how many other unpublished "rules" exist in the logic of the Nuvi, but they definitely are doing things based on factors that they are not disclosing to the users.
Sometimes I'll compare routing from AAA, Google Maps, DeLorme, and the Nuvi, and all four rarely agree on the same route. Sometimes, some of them even show the real best route.<G>
|
|
| Back to top | Link |
|
|
johmazz2006
GPS: Garmin Nuvi 765
|
| Posted: 06/10/2010 03:16pm Post subject: Re: Dual Routes |
|
|
| jcdeb106 wrote: | | On a recent trip to Moncks Corner, SC my 765T took me a shortcut via SC 178 but on the return trip it took me back through Columbia, SC. It was a confusing mess. |
Why not save the original route you travelled, then re- trace that on the return trip.
The best way is to use Mapsource and plan the route yourself and download it to the GPS and go the way you wish.
|
|
| Back to top | Link |
|
|
hfa8592
GPS: Garmin Nuvi 765
Guest
|
| Posted: Today Post subject: Re: Dual Routes |
|
|
There's more to the dual route issue than just what other posters have noted. Think about what these units do -- they constantly communicate with dozens of earth-orbiting satelites, talk to you (some let you talk to them), know what time it is, know what the speed limit is on most roads, and with FM traffic can even incorporate that constantly changing data into route planning. They are pretty advanced gadgets now-a-days and have a lot of programming jammed into them.
That said, there's no doubt that time of day and assumptions made about the correlating traffic patterns on a given type of road have an impact on route calculation, regardless of whether an FM traffic receiver is inolved, although that certainly adds more complexity.
Good luck,
hfa8592
Garmin Nuvi 855
Garmin Nuvi 260W
Garmin StreetPilot C330
|
|
| Back to top | Link |
|
|
|
|
