I wouldn't assume that because about a dozen posters or so in this thread actually had a true routing issue that wouldn't be common to all pnd's that you will be one of them. The majority of posts are from the same handful of members. That doesn't mean that they don't have a valid problem, but I haven't seen evidence yet that all xx5 nuvis suffer from poor routing choices on a regular basis.
Have any of you updated your 2x5's to the latest 5.7 firmware? And if so, can you check one of the problem routes again?
The wife and I were on vacation earlier this year and going through Alabama my Nuvi found a most interesting route. We usually dont' mind the back roads because we enjoy the scenery, but this one had me a bit worried. we had been on a state hwy and all of the sudden it wanted to turn, ok it was more of a side road but then that side road turned into a one lane road which eventually brought us to this bridge and eventually back to teh state hwy we had been on..
I now set mine to avoid unpaved roads in avoidances. (Couldn't really tell if that road was unpaved in your image.) If I cannot get a route I need I may uncheck unpaved roads in avoidances, but otherwise leave it checked.Does the 765 have these settings?bob
I now set mine to avoid unpaved roads in avoidances. (Couldn't really tell if that road was unpaved in your image.) If I cannot get a route I need I may uncheck unpaved roads in avoidances, but otherwise leave it checked.
I too can attest to the poor route on the nuvi 755t and the problem started AFTER I updated the mapping right after I got the unit. I've only had mine a couple weeks but its obvious something is wrong with the mapping and/or routing software. My old 2610 streetpilot was far superior in its routing and it never would divert you off an interstate onto a state road. I life in north GA and every time I have to travel north on I-75 the nuvi wants to send me up state route 41 to East Ridge, TN -- a distance of 8 or 9 miles -- before it puts me onto I-75; route 41 is a winding, narrow, two lane road with a speed limit of 45-55. By contrast my old streetpilot would put me on I-75 just up the road from my house. There is no way the nuvi route is quicker. This is a glitch of some sort that has to be built into the mapping software because if I map the route on the computer using the mapping software, it too takes me up route 41 to East Ridge before putting me on I-75 N.If I take any kind of trip to a geographic place I am not familiar, you can be sure I will create my own routes and download them to the nuvi prior to going. Of course that will only solve part of the problem as there are numerous times when you need to plug in an address to go somewhere locally.
...However, I found if you changed the routing preferences on the Navtaq maps that came with the nuvi 755t and increased the preference for major highways, then the routing function on the mapping software did not divert you off the interstate, it kept you on I-75 all the way to Knoxville. Of course this still won't solve the problem if you create a route on the nuvi using the "where to" function. Nonetheless, if you create a custom route on the PC and download it to the unit, at least you know it won't take you unnecessarily off the interstate. Just thought I would let you know.
This article explains the Garmin "learning" and simulation speed adjustment: http://www.gpsreview.net/train-your-nuvi-eta/
“We do learn from a driver’s habits and adjust the ETA accordingly. We do this by observing what speed a driver typically drives on each speed category of road and use that to compute ETA.”
The part about the learning and ETA adjustment that I have not been convinced of is that the nuvi actually alters routes because of it. I guess to prove that you would have to show that different roads were calculated on a route before and after a hard reset for the same start point and destination using the same routing preferences.
I agree with you and the conclusions of the article completely gatorguy. I have not personally experienced the routing anomalies on my 755T that are discussed in this thread...Until Garmin includes real stats on specific road segments and day/time ranges in their routing algorithm (like TomTom does with IQ Routes), there will continue to be cases where generated routes are not optimal in the opinion of those who have local knowledge. That said, I am confident my nuvi will "get me there" and that is what matters most when I am in unfamiliar territory.
I have seen some issues like the one you just described ... off the Interstate and right back on at the same or next exit ... near Atlanta. I ended up turning off all avoidance preferences, including traffic and U-turns and it quit doing that. It didn't make sense but in that particular case, it seemed like the traffic avoidance might be causing the problem just in a particular area.
Where do I find the simulator? Would be nice to know the answer, yes.
aslg,That makes me think I better stick with TomTom!I have had no such issues on my 920T!
Too bad they don't read the forums!
Too bad they don't read the forums!Most common folks that buy GPS units these days are happy just to get there and if in a strange area, don't know the difference.I really hated having to ditch Garmin but.........bob
I am thinking about a Tom Tom 930 (I often go to Europe). Is there a way to test online its routing capabilities?
Too bad they don't read the forums!There is a certain irony that a little while back in this thread we were discussing that they do read these forums. :)
If you google around you can find posts similar to the ones in this thread starting from 2007. Based on that I would say that Garmin cannot care less.
I am thinking about a Tom Tom 930 (I often go to Europe). Is there a way to test online its routing capabilities?Not 100%.... but you can get real close by playing with TomTom's Online Route Planner. (http://routes.tomtom.com)