Strange 3790LMT Navigation

It is not just the 3790. Both of my older Garmins do the drive past/U-turn/right turn sequence quite often on streets that have multiple lanes in each direction. It seems to have a real aversion to left turns in these situations. It is almost like it thinks there is a median preventing the left turn.

On a recent trip in the Black Hills, I observed similar behavior on rural roads when a very sharp left turn was required ... when two roads intersected at a sharp angle. It would take me past the intersection, then prompt for a U-turn. The prompt was something like "In 500 feet make a U-turn, then keep right on Nemo Road." How is a U-turn supposed to be safer or easier than a sharp left? Go figure.

That's it. When you said "median" it rang bells. I have a situation where my 765 takes me past the left turn which would cross a divided highway at a red light into a Walmart. Literally - it takes me on down the median highway until it becomes a just a 4 lane highway and has me do a u-turn at the first red light it comes to.

It has to be the median that is driving this.

By the way, this is a Navteq issue, not a Garmin issue. I called navteq and a rep and I looked at their overhead maps to see the two left turn lanes. The rep admitted that one should have been able to left turn.

So there's no "fix" for this issue? This is enough to make me wish I had never bought a Garmin. Drive a had mile past two safe median crossings, past an intersection, and then make a dangerous U-turn across 3 lanes of traffic just past a busy intersection that is always backed up?! Are you nuts!

A gps is an aid to navigation. It doesn't replace your personal observations or actions.

My 2360 does it, my Tomtom One XLS does it, my friends Magellan does it but all in different areas so its not just a issue with Garming. If my Tomtom had its way I would be driving down the main runway at Tampa International Airport. Its no different then a buddy sitting in the passenger seat giving directions, if he tells you to turn and you dont think it is safe then dont turn there, there will be other places to turn.

In any of the situations reported here, has the U-turn avoidance been turned on?

I realize some of these situations will involve medians and other issues but I'm wondering if telling the GPS that you didn't ever want to make a U-turn unless there was no alternative would have helped.

That's a good point T923347. I forgot the U-turn avoidance even existed, as I tend to keep all avoidances turned off. But I will have to try using the U-turn avoidance to see how it affects this issue. I suspect having the U-turn avoidance will cause the nuvi to generate some kind of convoluted route like going around the block to enforce the right turn. But it is worth a try to see what happens.