ETA extremely over-estimated

I have read a lot of comments on the forums about eta on their units and most was on the negative.Most of the time I never even paid that much attention to the eta on my c340 but after reading on the forums about it I had to check it out.I drove to FL from VA and have taken a lot or short trips while in FL and can truly say that my unit was pretty much on the mark.My wife and I both wondered how Jill done such a good job on ETA.

Here are a couple of the threads on ETA:
http://www.poi-factory.com/node/6557
http://www.poi-factory.com/node/3570

RT

Make sure the time zone correct and you have corrected for daylight saving etc.

Yeah, I have never had any real huge gaps between eta and real time. Let me restate that, I have, but that is cause I am going WAY faster then it expected me too.

Just returned from a trip from Seattle to Whistler, BC and mine was very accurate! It is also always right on during my 6 minute daily commute.

I noticed on an 8 hour trip home one time that I pulled up to my garage within one minute of the time it told me then I started (that was on my 2610). I was pretty impressed. I think on longer trips it may run it a little high to adjust for gas stops etc.

I suppose that could have been part of my problem....I normally use the GPS for shorter trips (3 hours or less), this was the first time I had used it for anything above 150 miles.

I just checked mine on the way home, just out of curosity, i was over 150 miles out from the house, following her directions, she missed the house by 3 minutes, Hadnt tried it after she set course and then i go my own way, will have to try it next time.

Whoa boy ya'll shud try a big truck across country. it really does not do too bad, but these units are made for automobiles. there are someplaces where i "techanically" only drive 55 when ya'll can do as much as 70.

I have noticed that the type of roads I drive on make a difference. On the interstates, the estimated time is very accurate. But when I do a lot of driving on the state highways here in Texas, the ETA is way off. It seems to estimate the driving speed on these roads as 50-55 mph, when in reality, many of them are 70 mph

My 350 usually underestimates travel time.
However I am in a city where traffic is unpredictable, so I don't expect mush better accuracy.

Our nuvi 350 is pretty accurate. My wife left on a 7 hour trip, after two 30 minute stops she arrived in 8 hours.

you shouldn't confuse Speed driven and Speed Limit.
I typically drive 4-5 mph over the speed limit(I'm not a certified NASCAR driver) and most times I feel like I'm driving 20 mph below the speed limit with the way most vehicles go by me.
I wonder what would happen if they got a front tire blowout !
Anyway, back to the subject - I find the ETA calculator on my GPSr's to be amazing in estimating my time of arrival. It continually updates as I go along and is a VERY USEFUL tool.

I also find the ETA useful.

I also do 4-5 over and feel like I'm doing 20 mph below when a big rig flies by...and I also wonder...which of the 18 will blow.

I give you kudos for only 4-5 over in your rig.

I drive around 100m a day going to and from work and I will beat the eta by a few minutes each way and I always do the speed limit........(my nose is growing) well some times I think of doing the speed limit.....but I will keep it around 10mph of the limit.

My eta during my 30-mile morning commute is not too bad unless I use the interstate. The traffic is so bad and unpredictable here in Phoenix that the eta is off if I try and get on the interstate.

On a recent trip to LA, the eta was right on the money. It even adjusted the eta during a brief stint driving 90-95 mph.