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| T O P I C R E V I E W |
| gpspassion |
Posted - 07 avr. 2008 : 20:42:40
TESTING - TOMTOM'S IQR (Intelligent Routing)
Available on the GO 930 (see topic) - Navcore v8 - Maps v800/v805
Click >> HERE << for the full article on the portal
Ever since TomTom Navigator 2 was released five years ago in the US, TomTom's routes and ETA calculations have been regularly criticized, the consensus being that the road attributes in the TeleAtlas maps in the US did not provide enough information. TomTom's answer is IQ Routes that complements the standard road attributes with actual travel times collected over the years and they say it provides a better route 50% of the time, see TomTom's site for the full details. Sounds good on paper, but does it work ? After buying a GO 930T (see GO 930T Topc) this week-end, I was eager to find out.
To put IQ Routes to the test in the US (see note about Europe below), I used a problem route * from Des Moines, IA to Madison, WI where the default route is "not right" by default, a long detour via Rockford and excessive ETA as seen below. When IQ Routes kicks in, it's a completely different picture, with the route using the "best" route with a sensible ETA. This is the route a local user would choose and also the route suggested by the Navteq based Garmin 760 or Google Maps.
WITHOUT IQ ROUTES
WITH IQ ROUTES
Click >> HERE << for the full article on the portal.
Questions, comments ? And if you have "problem routes" you want checked with IQR, feel free to post them below.
*This route was highligted as a problem route on the Dash Express, also based on TeleAtlas maps, in this topic |
| 15 L A T E S T R E P L I E S (Newest First) |
| gpspassion |
Posted - 16 mai 2009 : 01:18:13
Yes, and the initial testing was done with IQ Routes v1, v2 would normally have improved performance with its finer (5 minute) data increments. I don't have an x40 with US maps, so if you get a chance to try the test routes I used in the first message it would be interesting to see how v2 does. |
| cperk |
Posted - 16 mai 2009 : 01:09:43
I tried several different route planning from my home to work and found the IQ routes to be pretty accurate. The normal trip is about 28 minutes with no traffic. However during rush hour the route normally takes about 45 minutes. The trips planned on my Go 740 during these times was within minutes of the actual time. Pretty neat I say, my Garmin gives the same time no matter when you plan the route. |
| gpspassion |
Posted - 07 oct. 2008 : 22:33:12
Welcome to the forums.
Hard to tell since TomTom does not provide any details on the IQR data they use, there have been cases of roadworks that lasted a long time over the past two years and since TomTom use statistical data for IQR there is a bit penalty on that road that is no longer justified now that the roadworks are finished. |
| lonnyda |
Posted - 07 oct. 2008 : 22:18:16
quote:
Originally posted by 21rouge
I was checking a route from my home to another address with which I am very familiar with.
Letting my GO730 with its IQ do its thing it gave the route as 35 minutes for 34.8 km.
I did a "Find alternative" then chose "Travel Via" and selected a certain Hwy (this Hwy did not appear at all on the previous IQ route).
Well to my surprise this route shows as 33 minutes for 35.1 km .
Isnt this a contradiction? i.e. an IQ route should always show as the fastest?
I have the same thing happen to me on the way to work each morning. TT suggests I take a main road with lots of traffic lights to downtown at 16 minutes. When I come to the Y in the road to go TT's suggested route and the normal route I go with less lights and still same size roadway, it changes within a few seconds to 14 minutes eta as I progress down my route.
Why does it not go via my route as the fastest. This has been happening each day to me for the past 3 weeks. Strange. |
| 21rouge |
Posted - 18 août 2008 : 21:03:53
I was checking a route from my home to another address with which I am very familiar with.
Letting my GO730 with its IQ do its thing it gave the route as 35 minutes for 34.8 km.
I did a "Find alternative" then chose "Travel Via" and selected a certain Hwy (this Hwy did not appear at all on the previous IQ route).
Well to my surprise this route shows as 33 minutes for 35.1 km .
Isnt this a contradiction? i.e. an IQ route should always show as the fastest?
|
| offthegrid |
Posted - 28 juin 2008 : 16:21:23
Sorry I said that wrong, it will be an even better feature once they are able to break it down by time and day.
I'm really referring to rush hour variables but your are correct. Eventually they will accumulate enough data to do this by time and day of year to account for other variables such as the seasons.
Its just a matter of time and continued collection of data.
TomTom is on a roll. |
| MichaelLegner |
Posted - 28 juin 2008 : 09:20:27
Well, for an old TomTom user it is already a great feature since the unit now calculates the estimated remaining time much more precisely than before.
If they had to break it down into time by day you also have the problem with different seasons and different weather affecting the speed. One smaller road that is fast during summer can be very slow in winter due to snow or ice. |
| offthegrid |
Posted - 28 juin 2008 : 03:17:05
Great feature once it is broken day by day and time of day. I'm assuming they need more data to make those breakdowns. |
| gpspassion |
Posted - 12 juin 2008 : 13:51:37
That part "the company will launch a new generation of products including maps that carry TomTom's data on driving conditions" ?
Yes it makes sense for TomTom to make the data available to existing TeleAtlas customers, in a way it's the answer to Navteq's Traffic Pattern data that's only been used on the Intellinav iNav v3 AIO as far as I know and not very successfully |
| gatorguy |
Posted - 10 juin 2008 : 01:15:39
Just a note that IQRoutes will not be exclusive to TomTom's. Mio, HP, any manufacturer purchasing TA mapsets, will have access to it, and several will likely do so.
http://www.reuters.com/article/summitNews/idUSWEA777020080521 |
| gatorguy |
Posted - 31 mai 2008 : 21:44:04
The IQR on the 930 is certainly a big improvement over the rest of the TT line. Depending on time of day, the 930 is actually more accurate in it's time estimate than my nuvi760. At off-peak drive times, such as mid afternoon, early mornings, or after evening rush, the 760 is usually closer to the actual time. Where IQ really shines is it's routes, which now more closely mirror the nuvi routing, which has always been good. There have even been a couple of instances, especially rush hour, where the 930 has recommended a slightly faster route. Those trading up to the 730 or 930 from an older TomTom will likely notice some very good changes. Those moving from the nuvi platform would probably notice little improvement outside some specific areas and times, IMHO. |
| NanaimoRick |
Posted - 03 mai 2008 : 16:22:28
We are about to hit the road so I'll check on the roads used by the various routes later today and report back.
I have done the same with the Nuvi 760. I built the route in 2 sections, one to by brother's home in Ontario and one from there back to our home. The 760 has a problem however, it runs out of internal memory about 3/4 of the way through the return home route calculation. Although I can see the overview map it simply draws a straight line from the last calculated waypoint through the remaining ones to the finish, thereby screwing up any time and mileage readouts.. Not sure how far the 760 would have gotten before giving up if I'd built the itinerary as on large route like I did with the TomTom's.
 |
| gpspassion |
Posted - 03 mai 2008 : 13:00:20
Interesting, thanks for sharing, hard to tell from the overview map if the 5 miles difference means a lot of different roads or not.
Had you done the same planning on the Garmin 760 ? |
| NanaimoRick |
Posted - 03 mai 2008 : 04:12:33
Just completed building the itinerary for our road trip that starts tomorrow (see http://www.gpspassion.com/forumsen/topic.asp?TOPIC_ID=110142 ) using the 920T as well as the 930 with IQR on and with it turned off. In all cases the route includes using toll roads and on the 930, HOV lanes. If the results are accurate it appears like we can save a few hours on the road using IQR:
920T
930 IQR on
930 IQR off
 |
| cgavula |
Posted - 01 mai 2008 : 17:43:21
I see in your post you spelled Alion with 2 "l"s. It only has 1 "l". It may be listed as Tillman's Corner rather than Mobile. I know some data sets seem to show it that way.
It's interesting. GM seems to use Navteq maps, which are correct (TA maps are wrong). That route isn't the fastest or shortest, but it is on roads that are rated at higher speeds (40MPM-45MPH) which is proably why they were selected. Can't fault it for that.
The route I mention starts on the same roads, but then you turn right (east) onto Helton, north onto Hillview, east onto Wigfield, north onto Travis (Travis Ext.), then lastly east onto Three Notch Road.
TA version of the maps show a bunch of roads, including Alion, that aren't there in reality. Alion DOES exist but it's really a bit further to the east (where you see another instance of it on TA maps). |
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