Glitch in 760 navigation= 5 hour detour.

I didn't use my 750 to try this but used MapSource.

When I had the Route Preferences set to "Shortest Time" and my distance from the Park was great (over 750 miles) it routed me through the North Gate. But when I set the Route Preferences to 'Shortest Distance' it routed me into the park through other gates.

I tried routing from Cecilia KY and also from Las Vegas Nv with the above results.

I also tried closer routes, say under a few hundred miles, and it routed through various gates East, West, South and North)using "Shortest Time".

So the problem may be what 'Preferences' you are trying to use on your 760. Such as "Shortet Distance" or "Fastest Time".

Do you have the 760 set for toll roads or avoid toll roads that makes for a big difference in the routes
For Example if I set mine for toll roads to go to NY City from where I'M at it takes 12 hrs
if I set to avoid toll roads to NY City and recalculate the route it takes 23 hrs to get into NY City by going all the way into Canada and back down to Ny City

Hope This Helps

My 750 selects the same route as yours.

Could it be that the nuvi is selecting this route because the road from West Yellowstone into the park is closed from November to April?

Maybe it is smart and knows what time of the year it is. See: http://www.nps.gov/archive/yell/interactivemap/wetomad.htm

Other roads to Yellowstone are also closed November to late April or May.

Speaking of Estes Park, I was amused by the info signs showing pictures of someone going up steps with a wave behind them. Not so amusing was that 2 weeks after we were there, a dam let go and a wall of water washed through the town. I imagine it is tough to drive to the top of Pike's Peak about now, other than on a snowmobile.

I hardly Think so The GPS Does now if its Snowing Or the Sun is Out Or The Time of year it is The Mapping is still the same the same roads are there all year around whether there closed for a reason or not

MapSource has an option to avoid "Seasonal Road Closures" so it might be built into the Nuvi even if there is no option to check that on or off. I just calculated a route from Rexburg to Old Faithful using MapSource and it took me to the west entrance. After I turned on "avoid seasonal road closures" and recalculated, it took me to the south entrance instead.

I created the route in Mapsource using NT 2008, and the option to avoid Seasonal closings unchecked. It routed me direct to the south entrance.

On my 760 it uses the west entrance. It has NT 2009. I don't have the NT 2009 maps installed in Mapsource.

I can find no way on the 760 to change the date while in GPS simulator. Even thought the GPS is turned off, holding down the Sat signal brings the satellite screen up which shows the GPS still receiving signals and plotting the current position, as well as the local time and date.

So it would appear to be a function of the NT 2009 routing algorithms that the NT 2008 version doesn't have.

YMMV

This must be some kind of bug as Mapsource, Streets & Trips and Windows Live Search (on my Cell) all route me the correct way, but my nuvi760 routes it wrong. I guess this is were the human factor comes in to play. I always check the routing especially the last couple of miles as I find that I'll be routed off of an interstate early to drive side streets (no matter on settings fastest vs shortest).

Sometimes it will route me to make a u-turn as the location is on the west-side of a divide roadway and the route brings me on the east-side creating the u-turn instead of routing me so I'm going west bound to start with. (yes, avoidances are set to avoid u-turns.)

I just went back to Mapsource, NT 2008, turned on Avoid Seasonal Closings, and created the route from Phoenix. It properly avoided the seasonally closed south entrance and took me to the west entrance.

So I would say that the 760 is functioning properly and avoiding Seasonal Closings. The 760 is not wrong. The road is closed now.

S&T and WL don't know about Seasonal Closings.

Yep, U R so correct! Just wished that these options were available in the settings on the nuvi760.

No, the OP is on to something. The 760 is NOT routing the same way that MapSource is. Not even close! I set my location to Rexburg ID because it was fairly close and relatively equal distance between south and west entrances. I unchecked ALL avoidances and even changed from Fastest to Shortest and the 760 takes me to the north entrance no matter what. MapSource will alternate between the west and south entrance, depending on the Seasonal Closures setting. MapSource NEVER recommended the north entrance.

I've been using a 760 and MapSource pretty extensively for 6 months now and have never seen any significant routing discrepancies between the two. There's something going on with the map data in that area that is triggering a huge difference in routing between the 760 and MapSource.

Thank you to everyone who has replied.

I tried, when I first detected the issue, removing all avoids, and also toggling shortest distance and fastest time.

The road in Yellowstone IS closed right now. It wasn't when i was there with my 680 and had no problems.

I'm going to call Garmin on either Saturday (if they are open) or monday, and ask.

The odd thing is, the other area I've detected this problem, west of Estes Park Colorado,is also a seasonal road.

On the other hand, the north entrance is indeed the only one open to wheeled vehicles in winter, but you sure can't drive to Old Faithful from there (or anywhere), the only raod open in Yellowstone is 212, which runs east from the north entrance. You can see Mamoth hot springs, but that's it, except for the road through to the east. Perhaps the fact that the north entrance is the only one open is why it sees that route, even though you can't get to the old faithful area from there in winter?

Anyway, I'll call Garmin, and post my findings here.

I just can't understand all the consternation over this "issue".

Why is it so hard to understand that the GPSr that is designed for real-time navigation in a moving vehicle might actually have the necessary information built into it so that it will NOT route you to a road that is closed.......on a published schedule, EVERY YEAR at the same time ???

Seems to me like you should be thankful instead of upset.

It also is no surprise to me that online maps, that are designed to be MAPS and not navigation devices, would not be "smart" enough to duplicate the action of the GPS navigation device.

Sure looks to me like everything is working the way it was designed and intended to work. And yes, other models may not be that smart and might work more like a dumb map.

It WOULD be nice if the manufacturer would tell us about little things like that.......but it appears than none of them do.

P.S. I bet that the person who answers the phone at Garmin won't know that's how it works on that model either.

My strong guess is that this routing to due to the seasonal road closure.

We had a discussion on the groundspeak forums about a similar issue.

On the nuvi, it routed around the closed road. In MapSource it routed this same way if the avoidance for "Seasonal Road Closures" was checked. And it routed ON the closed road if that avoidance was UNCHECKED.

Since the nuvi doesn't have this option in the Avoidances, the logical conclusion is that the unit routes as if this option is ALWAYS checked.

The reason for the "consternation" (hardly the word I'd use) is rather simple; the unit is acting in an erratic manner due to either some sort of undocumented "feature" that there is no way to turn off, or some kind of glitch.
Whenever something I depend on acts in an unexpected manner, I like to find out why.

Even a search of the Garmin support database turns up nothing about seasonal closures of any kind. Therefor, if this is some sort of "feature", they have been remiss, at least, in neglecting to document it.

One of the things I use my GPS for is route planning (Shocking, I know). That's how I discovered the problem; I'm planning on returning to Yellowstone in spring, and wanted to know how many hours it would take. If the Nuvi is automatically, and without any way of disabling it, discounting seasonal roads, I'd like to know about it. I'd especially lie a way to turn the darn thing off, but knowing about it (or even better, a way to extract the closure dates) would be a major plus.

BTW, if indeed it is avoiding seasonally closed roads, it is doing so inconsistently. I've just tried a few in Alaska that are seasonal and it uses them just fine.

Your GPS unit is a poor trip planning device. It's an excellent guidance unit.

Do your trip planning with Mapsource, Streets and Trips, Mapquest, Google, or Delorme. Then you can load these routes to your GPS.

For what you want to do, the unit you have bought will not suffice. You need a unit that will cost you at least twice if not three times the retail cost.

Your unit is performing exactly like it's designed to, and within in the limitations of the database provided and the routing software engine firmware.

As I stated in an earlier post, your unit is behaving exactly like it was programmed to.