Tunnel Mode - Please add your model if it offers Tunnel Mode

Certainly!

You know, traffic was heavy at the time and I didn't notice, but from memory, I think it did before. I will be going thru again, sooner or later.

If the 660 has these features then this thread is "much ado about nothing". In other words, the units are working as designed, whether anyone paid attention to this "feature" or not in the past.

The auto setting for the 660 "Allows the device to automatically change the color mode based on sunrise and sunset times. This is the default color mode setting". Per https://support.garmin.com/en-US/?faq=8yQSp64c0yASmhFbzzg6W5...

Not sure knowing screen colors,and speed maintained when entering a tunnel accomplishes. We all know the signal is lost once we enter . So what ever mode the screen display goes in is irrelevant. The GPS device is of no use until we near or exit the tunnel. How could this benefit us as a FAQ?

I agree but it may be that the 660 is a notable exception if it truly offers TM.

From this thread, the following models do not offer tunnel mode:

nuvi 750
nuvi 855
nuvi 1390

Since starting the thread, it's become obvious to me that there's a lot of uncertainty about the whole issue.

I don't want to step on anyone's quest for knowledge, but I've been watching this thread since it started and wondering "why is this important and how is anyone going to meaningfully use the all the information?". Seems like a dead end. A GPS does not work in a tunnel so don't look at it until you are out of the tunnel.

Not sure it's important, just fun "to see and discover" if your unit had something you never heard of before? Mine works in the tunnel, even if it's a little "out of touch" so to speak. It tracts pretty accurately and unless you speed up from 40 to 90, the car on the screen exit the tunnel at about the same time as your real life car does, switches the screen and goes about it's business. Community fun topic is what I would call it

I suppose, but I would be more impressed if the little car icon spun around in circles when it lost signal instead of the false sense of continuity that is displayed by the icon moving at a constant speed. Some idiot is going to complain that his GPS said he was traveling 50mph and he jammed on his brakes to slow down and that that caused an accident.

I think the faq should be used as a Warning about the possibly of incorrect readings when in a tunnel, making users aware of a sense of false readings.

As mentioned early in the thread I took a video of this tunnel mode I thought it was an anomaly and started a thread about it. The video shows the GPS going into and out of night mode. Now if you watch the video you'll see an on ramp to the right that also goes through the tunnel but is separated by a wall until after the tunnels where traffic then yields onto the main highway. What I noticed last week was that the on ramp, just a few yards to the right, does not go into tunnel mode, only the main drag.

Here's the original video: https://www.youtube.com/watch?v=PpqcArXTkVk

This info is helpful.

Don’t think that would be useful to me.

I admit that this is just "Trivia", but it is also a way to keep your Windmill alive.

Also, "Little" facts help. I had a friend that owned a Cadillac. On a trip to Atlantic City and going through the Bay Bridge Tunnels, the radio's digital display would dim (this was back when they first used the bright green fluorescent displays). So they thought that something was wrong and turned around and went to a dealer to resolve the problem. Well, the dealer informed them that there was nothing wrong since the Headlights came on automatically, then the radio display would dim as well. Of course - if they had read the owners manual they would have known that.

My 2016 GMC Sierra has the dash lights on all the time (unless you turn the "Automatic" lights feature off). When the headlights come on at dark, or in a tunnel, the dash and Radio/Nav lights dim.

The point is, that knowing that your Garmin has "Tunnel mode" will help you understand why you hear the message "Lost Satellite Reception" because you had to slow down in the tunnel and your Garmin didn't get the GPS signal when expected. I'm sure that some users thought that something was wrong with their unit and may have even contacted Garmin about it.

I made a Memorial Day trip to the Duluth MN area and explored the north shore of Lake Superior. The route included passing through several tunnels which gave me a rare opportunity for this Iowan to see the NuLink 1695's reaction. Indeed, it did show continuous path/speed even as satellite radio went quiet. I did see a slight flicker in the display as it switched between normal and a dimmed view.

You can add the Drive Smart 61 LMT-S to the list.

The first link below is a video of my 61 going into and out of "tunnel mode".

Note it's not exact, there are two tunnels in a row on this road, the second is slightly shorter and does not go into tunnel mode. Where it does change I'm nearly half way through before it does and I was 5 - 10 mph under the posted speed limit.

Also in the photo (2nd link) there is an on ramp that goes through the tunnels before dropping onto the highway and the GPS does not go into tunnel mode for either of them.

https://www.youtube.com/watch?v=IgL0UODBboc

https://s15.postimg.cc/ip56v3scr/tunnelmode_no.jpg

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earlier this week, passing thru a series of long tunnels, and I got a warning from my 3597: Lost Satellite reception !