Does GPS Learn Driving Speeds

Cool! Thanks for sharing

only if one driver used the unit.

So from reading this, I take it that it uses the averaging data that is stored on the average speed, time traveled etc. to determine your speed. Hmmm.....I guess we need to take a scientific poll to determine this from all our users.
JM or Miss POI, do we have the ability to do polls here?? This would be a fun addition to the site.

My daily commute to work starts with exactly the same minutes of drive time calculated on the display. It then continuously updates the ETA to be later and later as I hit traffic slowdowns. If it were to "learn" this pattern, it would know to start me off with a later ETA right from the start. It's initial estimate only works if I leave for work at 2AM when the roads are empty. After reading the patent info, Garmin obviously has the capability to learn the highway speeds, and it would be cool if they did. It would then learn my preference of making time when the roads are clear vs driving at the speed limit. In addition to the speed, I'd like it to learn some of my preferences in routing, too. Sort of a Tivo for the highway....

But don't forget it only uses the class of road, not the actual road. So if during the day, you are out on the same class of road, or in the evening on the same class of road, and your average speed is higher, that would be the result.
It is really most useful and accurate on highways with fewer disruptions I think.
One cool thing to try would be use the GPS ONLY on your morning commute and not at all on other times of the day for a few days and see if it gets more accurate on your morning commute.

I use both a Garmin 660 and an older Garmin III plus. Although both give me a distance and an estimated time of arrival, the 660 is very accurate at both because it appears that it uses actual road miles in it's calculations whereas, the distance proviced by the Garmin III plus is calculated using a "straight line" to destination point, and the ETA is constantly being adjusted based upon the speed at which I am traveling.

I prefer what I think is the current system. The GPS estimates what time I will get to work and I know that if I speed (a bit) I can beat the time by a minute or two. I don't want the unit to presume that I'm going to speed every day.

I drove in heavy traffic and light traffic on the same toll roads depending on time of day i travel.

the Nuvi 660 appears to determine eta based on road type and speed preset for that road type. It them adjusts eta based on average speed on current road type and adjusts eta accordingly. I use this every day watch for traffic problems. it is not remembering a road type but evaluating currnet speed averages in the calculations.

That's how my Nuvi 200 seems to work.