Hi! We see you’re using an ad-blocker. We’re fine with that and won’t stop you visiting the site.
But as we’re losing ad-revenue from this then why not make a donation towards website running costs?. Or you could disable your ad-blocker for this site. We think you’ll find our adverts are not overbearing!
Issue 1: The 2min delay reported by the HDT was an accident, which actually took me a good 40 minutes to get the 2min marker on the map, which still said 2min when I got there. Not really what I was expecting.
Ahh, so what you're saying is from A-B-C, it took 40 min to get A-B and then there was a 2 min delay from B-C - i.e. you're questioning why the A-B wasn't reported. Sorry, I misunderstood; your earlier comment sounded like it took you 40 min from A - C but only reported 2 min: " The one incident I did get reported as a 2min delay was actually more like 40 minutes. "
ziro wrote:
Issue 2: The TT reported a usually-40-minute-on-a-clear-run journey as 40 minutes in peak time. It took me an hour and 10 minutes. However now, as a result of driving it a few times, the IQR seems to kick in a bit more accurately and has most recently revised the journey to take an hour, which is more like it.
Interesting, since IQR should only change with a map update, as the IQR data is hard coded. Did you do these at different times of the day?
ziro wrote:
Issue 1+2: If it has taken a couple of journeys to build up some info about my commute for IQR - the argument that "the IQR takes 'normal' congestion into account" void - since technically I'd have to drive everywhere to build up any decent IQR knowledge to get any decently predicted IQR times.
I really don't know what happened to you, since IQR data should not change, *unless* you download a new map. The whole point of IQR is that other people collectively have driven everywhere, and that data is built into the map.
ziro wrote:
To be honest, I'd rather just see congestion/queuing traffic as a HDT report, since I am very skeptical that IQR has any existing knowledge at all.
It definitely does. I planned my home-work trip last night - 1h 24. I did the same this morning - 1h 42 Both of those were without any traffic alerts on route.
Driving into London on the M40 yesterday, first outing with my 540, in a gentle left hand bend.
Bong bong went the unit, and the hazard symbol (red triangle with exclamation mark) popped up. This is unusual, I thought, I wonder what it could be?
As the road straightened out there, on the hard shoulder, where TomTom said it would be, was a broken down vehicle being winched onto a recovery vehicle.
I think, TomTom did say they are tracking the existing x40 units as part of their traffic analysis. I'm guessing as more and more begin using HD traffic, the data regarding traffic would increase in accuracy. I'm assuming they will use information from the x40 units to support information from the mobile phone monitoring.
The best way for TomTom to speed this up would not be to wait for people to adopt the x40, but release the hd addon for the x30 units. Maybe the increase in reported incidents has increased because people are buying the x40 and thus traffic being reported more accurately?
The mobile phone data can't be as accurate as a GPS, the information regarding where the phones are more or less educated guess work.
A report congestion feature would be nice, but if many begin using the hd traffic then it would render it less useful as it is now as the units would already be reporting back information...
Joined: Jun 04, 2005 Posts: 19991 Location: West and Southwest London
Posted: Mon Nov 10, 2008 6:49 pm Post subject:
SydEx wrote:
As the road straightened out there, on the hard shoulder, where TomTom said it would be, was a broken down vehicle being winched onto a recovery vehicle.
Trouble is... we're all going to be looking at our TomToms wondering what it's telling us about!
Joined: Feb 27, 2006 Posts: 14893 Location: Keynsham
Posted: Mon Nov 10, 2008 9:19 pm Post subject:
Guinness2702 wrote:
I would expect that TT apply some intelligence to their data analysis.
And you read it in The Guinness2702 World Book of Records!!
Seriously though, you've posted a lot of strong stuff which seems like either insider TomTom knowledge, or access to a manual which nobody else has, or a seriously heavy power of reasoning.
Which one is it please? And does the damned hands free work yet without crashing and doing the repeats malarkey? _________________ Dennis
Joined: Mar 14, 2004 Posts: 297 Location: Dundee, Scotland UK
Posted: Mon Nov 10, 2008 9:56 pm Post subject:
matthewj wrote:
In my experience, the delays don't just disappear by driving through them. The time to destination drops off rapidly though as you drive quickly through a long holdup
that isn't there. The disappearance will have been due to an update I think. (This is with the standard traffic, not HD).
Funny you should say that, I had the exact opposite experience. A section of A road was showing 2/3 miles 20/25min of delay and I watched as i drove down it (it was actually clear), with every update, reduced the length of congestion and the overall congestion time very accurately. Admittedly, I didn't look at the change (if any)
in the ETA.
ziro wrote:
Here is a novel idea - a 'Report Congestion', 'Report Accident' button...
This is exactly what I was thinking. Ok, perhaps no good being able to report an accident once in the Que, but I'm sure we'd all appreciate being told at a point where we can divert and take an alternative route....a Feature of future x50, X60 etc I wonder?
One thing I have to hold my hand up to and say I wasn't aware of was how HD traffic will ONLY report congestion/slow moving traffic if it is significantly slower than the historical data it has for that particular day and that particular time and on that particular section of road.
So am I know correct in assuming that if road XYZ (lets say a M route with 70mph limit) has a historical speed of 40mph at 08:30 on Mondays and I'm scheduled to be routed through that road at 08:30 on Mondays, HD traffic will assume that it is anticipated (and calculate the ETA accordingly) that I will only be doing 40mph and as such not report any delay (despite the fact I would consider 40mph on a motorway congestion/ delay whether it's historical been the case or not) unless it is significantly slower than the historical speed of 40mph, say, 20mph?
This would certainly go some way to wards explaining why my 730 with GPRS traffic shows more congestion/slow traffic with the original IQR I, than the new 540 with IQR II does.
Does this mean that whenever anyone upgrades to the forthcoming 8.15 maps (with IQR II), and with a GPRS subscription, they too will only receive the non-anticipated congestion/slow traffic?
Could anyone perhaps shed some light then why HD traffic does not report (for me anyway!) roadworks, contraflows, lane restrictions, speed restrictions due to high winds (as my 730 is currently reporting right now for the Forth Road Bridge and Tay Road bridge). Is it not supposed to anymore? Isn't HD traffic supposed to report all that GPRS did but more accurately?
For example, Right now on my 730 I'm being warned of high winds on the Forth road bridge and in the Tayside area, lane restrictions on the A90, a contraflow on the A90 due to roadworks, and congestion witin that contraflow yet my 540 isn't reporting a single thing. Roadworks in the center of Edinburgh that have been onging for a while are also not reported on hte 540 but are present on the 730. _________________ Graeme Bennett
Go 540 LIVE
App. 9.510.1234792.1 (2039,04/04/2013)
United Kingdom & ROI v945.6174
Last edited by Graeme2812 on Mon Nov 10, 2008 10:01 pm; edited 1 time in total
Joined: Mar 14, 2004 Posts: 297 Location: Dundee, Scotland UK
Posted: Mon Nov 10, 2008 9:59 pm Post subject:
SydEx wrote:
Driving into London on the M40 yesterday, first outing with my 540, in a gentle left hand bend.
Bong bong went the unit, and the hazard symbol (red triangle with exclamation mark) popped up. This is unusual, I thought, I wonder what it could be?
As the road straightened out there, on the hard shoulder, where TomTom said it would be, was a broken down vehicle being winched onto a recovery vehicle.
Very impressed!
Was the bong in the top left corner and did it dissapear after a few seconds (15)?
To me that sounds like it was a safety alert/speed camera hotspot rather than a traffic incident. _________________ Graeme Bennett
Go 540 LIVE
App. 9.510.1234792.1 (2039,04/04/2013)
United Kingdom & ROI v945.6174
Driving into London on the M40 yesterday, first outing with my 540, in a gentle left hand bend.
Bong bong went the unit, and the hazard symbol (red triangle with exclamation mark) popped up. This is unusual, I thought, I wonder what it could be?
As the road straightened out there, on the hard shoulder, where TomTom said it would be, was a broken down vehicle being winched onto a recovery vehicle.
Very impressed!
Was the bong in the top left corner and did it dissapear after a few seconds (15)?
To me that sounds like it was a safety alert/speed camera hotspot rather than a traffic incident.
Yes it was and yes it did.
I guess the recovery truck was purely coincidental!
I would expect that TT apply some intelligence to their data analysis.
And you read it in The Guinness2702 World Book of Records!!
Seriously though, you've posted a lot of strong stuff which seems like either insider TomTom knowledge, or access to a manual which nobody else has, or a seriously heavy power of reasoning.
Which one is it please? And does the damned hands free work yet without crashing and doing the repeats malarkey?
Sorry, it's only educated (or naive) guesswork on my part.
Dunno about the hands free stuff, I very rarely make voice calls, so don't use it - certainly it doesn't justify the drain on my phone battery of having bluetooth on all the time.
Today I took a completely different route - told me 58 minutes, took me 1 hour 25 minutes.
IQR is about as accurate as picking a random time within an hour of the time it should take.
(I'm still not impressed)
Yeah, it still seems short of data. On my route to work, there's a stretch of road, where there are *always* queues in the morning - in the space of 2 or 3 minutes, the estimated time remaining went down only by about 20 seconds, suggesting that it wasn't expecting queues there. :\
I'm guessing that part of the problem is that people don't use their satnav for the daily commute, so there's a lack of recorded data in places for rush hour traffic.
Could anyone perhaps shed some light then why HD traffic does not report (for me anyway!) roadworks, contraflows, lane restrictions, speed restrictions due to high winds (as my 730 is currently reporting right now for the Forth Road Bridge and Tay Road bridge). Is it not supposed to anymore? Isn't HD traffic supposed to report all that GPRS did but more accurately?
I read the manual for the HD traffic last night (yes, I'm the one) and it says that the display bar doesn't show minor events so that the bar is not confusing. I presume that means they'll be in the detailed events, just not on the side bar.
Posted: Today Post subject: Pocket GPS Advertising
We see you’re using an ad-blocker. We’re fine with that and won’t stop you visiting the site.
Have you considered making a donation towards website running costs?. Or you could disable your ad-blocker for this site. We think you’ll find our adverts are not overbearing!
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
Or you could disable your ad-blocker for this site. We think you’ll find our adverts are not overbearing!
Hi! We see you’re using an ad-blocker. We’re fine with that and won’t stop you visiting the site.
But as we’re losing ad-revenue from this then why not make a donation towards website running costs?. Or you could disable your ad-blocker for this site. We think you’ll find our adverts are not overbearing!
Forum FAQ
Search
Usergroups
Profile
Log in for private messages
Log in
