GARMIN- Delayed TURN INFO

If this is recent behaviour your first step is a master reset, a 300 feet warning isn't normal as generally the first warning is around the mile mark.

I don't have any data on this and a quick Google each didn't help either but to me, it seems that upcoming turn alerts are speed or maybe speed limit determined so a 300-foot first alert may be OK for residential 25-mph areas but not for 70-mph highway speeds. Does anyone have more info on this?

I doubt that this is the problem but if upcoming turn alerts are way too late, make sure your device is in automotive mode and not bicycle or pedestrian mode.

I know that as the On The Road Garmin devices learn your driving habits, they better estimate ETA times. Could this also affect first alert distances during navigation?

I have noticed this problem also. Mostly on highways.

I always understood that it gave 36 second warning. Who knows why 36, but the slower you go, the shorter the alert distance. You get about 1 mile at 60 mph.

Doing the math you'd have to be down to about 3.5 mph for 300 ft warning. Very unlikely, so you'll have to check other causes.

I was not aware of the 36 second rule, but it makes sense that the alert would be time based rather than distance based. Not to be nit-picky, but to travel 300 ft. in 36 seconds is 8.33 ft/sec which calculates to ~5.68 MPH. Also at 60 MPH, it takes 1 minute (60 sec) to go a mile, so in 36 seconds you would travel 0.6 miles. In any case, the typical city block is about 300 to 600 ft. so as you said, it is unlikely this the cause of the OP's issue.

The "36 second rule" comes into play for POI alerts based on speed. POI Loader generates the condition which the operating system uses to play the alert approximately 36 seconds before arriving at the point. IIRC, this information is buried in the help section for POI Loader alerts.

Do we know if this 36-second rule applies to upcoming turns on a route as well?

First of all, thank you all for your timely input. When I'm on the HWY it does give me a warning approx at the mile mark and then again as I approach my exit shows a pip when I'm approx .8/10 out.? It mostly happens on the LOCAL roads..,

THanks...

My in-car NAV systems all give turn information based on speed from what I understand; anywhere up to 2 miles before the turn when traveling at 70+ mph highway speed down to a few city blocks when traveling slowly on a city street.

I've generally been pretty pleased with Garmin's timing of turn alerts and instructions on the models I've owned.

But I distinctly remember that, very roughly ten years ago, my brother bought one of the earlier bigger screen ones, and that riding around with him I definitely thought the last turn instruction in residential type navigation was much later than on my model, and too late to be convenient.

To the original poster: are you saying this behavior has changed on your unit? Or are you saying you think the timing is not appropriate for some range of circumstances?