From what we can tell it probably will not fix your unit. It does seem that the 7x5 and newer 1xxx units have more of a preponderance for taking you off the highway and onto secondary roads than the older units. However, it still is not clear to us, and probably never will be whether this is a function of just the unit routing algorithm, or a combination the routing algorithm change with newer map information. If you go back into this discussion, someone claims that working with Garmin tech support, maps from early 2009 and earlier solve this problem even on the newer units.
My opinion is that this is due to differences in the GPS unit programing. I have here a 760 with 2010.3 maps, a 760 with 2009, and a 750 with 2009. I can not find any difference in the routes these units pick unless there is a change to the roads on the newer map. All three do everything the same, the good with the bad. I don't think the different map versions have played a factor with the 7x0's preference of roads.
Just to correct my previous message,it was a software problem with the 1xxxx serious that will be correct with a new firmware update
I hope they correct it soon on all units. I returned my 765T to Best Buy & will wait to see if & when they correct it before I buy another Garmin unit. It had great potential, but the routing was very poor at best, especially when trying to rely on it in a large and unfamiliar city.
The MA route comparison between my Nuvi 780 and the new 1690. 780 has 2010.2 maps and 1690 has 2010.3 maps. How do these compare?760. Distance: 93mi, time 1:41.5.5mi: Right to US-1 S3.3mi: Keep left on Broadway13mi: Keep left onto I-93S1690T. Distance: 93mi, time 1:43.5.5mi: Right to US-1 S3.3mi: Keep left on Broadway12mi: Take New Rutherford Ave on right towards I-93 N/Somerville.04mi: keep right onto New Rutherford Ave towards N. Station/Gov't Center.5mi: Turn right onto N Washington St.2mi: Keep left onto I-93S/RT-1A NI'm not sure if the firmware update on the 1690 changed the routes. On the IL-IN route I put in to check the routing accuracy, sometimes it does come up with the right route, and sometimes it doesn't. I don't know if traffic has to do anything with it (I'm about 50 miles away from the problem spot) or it just is random changes.
Can you flash fw backwards?bob
Which older unit would you experts recommend and maybe I can find one on eBay.
GPS-led travel goes amiss; 3 Ore. parties rescuedJan 1, 6:00 AM (ET)By TIM FOUGHTPORTLAND, Ore. (AP) - In a holiday hurry, Jeramie Griffin piled his family into the car and asked his new GPS for the quickest way from his home in the Willamette Valley across the Cascade Range.It said he could shave 40 minutes off the time of the roundabout route he usually takes to the in-laws' place.Following the directions, he and his wife headed east on Christmas Eve and into the mountains, turning off a state highway onto local roads and finally getting stuck in the snow.They had no cell phone service and ran short on formula for their 11-month-old daughter. After taking exploratory hikes, trying to dig out and spending the night in their car, the distraught couple filmed a goodbye video.Like two other parties of holiday travelers who followed GPS directions smack into Oregon snowbanks, Griffin and family were eventually rescued. But their peril left law enforcement officers and travel advisers perplexed about drivers who occasionally set aside common sense when their GPS systems suggest a shortcut."Did everybody just get these for Christmas?" asked Klamath County Sheriff Tim Evinger, leader of one rescue effort.In Griffin's case, in fact, the GPS device was a Christmas gift, from his parents. He used it for the first time to plan the trip to Central Oregon.It's one he'd made many times before, following a route travelers have found reliable since at least the days of the Oregon Trail. But, he said, a shortcut the GPS device suggested was attractive."We were in such a hurry to get over there, we programmed it in the driveway and went ahead," he said.
Ok, here is one to try. Route from 302 N. Main St, Middleton, MA (Dunkin Donuts) to the City of Hyannis, MA. The route will take you down route 1 into Boston onto 93 South. It is possible to get from 1S directly to 93 S, but my Nuvi 755T in simulation mode takes me off route 1 onto New Rutheford Ave in Charlestown across a bridge into Boston and onto Washington St. and then onto 93 S. This is with map 2010.30 and avoidances set to no u turn and no dirt roads. I don't see this route selection anywhere else, such as google or mapquest.
This is another of those route examples where's there's no clear "best" route. Even a local driver made mention that 41 is faster at some times of the day. Perceived fastest is not always the actual fastest, particularly when only one minute or perhaps two separates two options. FWIW, the occasional routing off, then back on highways isn't just a Navteq or Garmin issue either.http://www.tomtomforums.com/general-tomtom-discussion/20678-tomtom-one-oddness-routes.html
Even more odd. . .Paying a visit to other gps forums reveals little to no unusual mention of routing issues on the nuvi series, yet several pages of concerns here. :?