LT
Member Since: 31 Dec 2005
Location: South West
Posts: 23385
  
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| Crazy Sat. Nav. directions. |
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My Sat.Nav. ("06 HSE version) seems to be going slowly mental. I've recently noticed that it is giving some very strange routes. Today though I was in Cardiff & entered a location in Portishead (Nr. Bristol). The obvious route was M4, M49 to junction 18 of the M5, then exit M5 at junction 19, which is c. 3 miles from Portishead.
I pressed the "quick" route but the map that came up on the screen showed a big loop on what looked to be the M5. Sure enough when I got to junction 19 of the M5 (Gordano services & Portishead) the sat.nav. told me to continue on the M5 to junction 20. I obviously ignored it & got off at junction 19. On the junction itself it re routed me correctly.
Why the  was it telling me to go on to junction 20 of the M5 & then come back on myself to get off a junction 19 
Have I incorrectly set it up, or is it just a rubbish system
Can't believe it would be so stupid & the M5 is hardly a new or minor road 
Any ideas
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 14th Dec 2006 7:17 pm |
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stapldm
Member Since: 11 Sep 2006
Location: Swine Town
Posts: 2330
 
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LT, I'm still waiting to get my hands on a real Disco to find this out the hard way, but do you have TMC turned on?
Other posts from those more knowledgeable than I have suggested that the TMC in this country is, er, less than optimal - Is it possible it was detecting earlier junction closures / roadworks / traffic jams and therefore navigated you around the 'obstruction'?
I seem to remember from my test drives that such sections of 'to be avoided' road are usually highlighted red.
Just my best guess, hopefully other ideas will be forthcoming. Dr. Ian Malcolm:
"Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should."
Transgenic tomato anyone?
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| 14th Dec 2006 10:27 pm |
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ronp
Member Since: 29 Nov 2006
Location: North Yorkshire
Posts: 15214
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As far as my 62k mile D3 experience is to go by........................................
'Sat Nav is OK...as long as you know where your going'.
seems to defeat the objective, i know!! I was a normal heterosexual chap, but in these new woke awakenings I now identify as a Wardrobe.
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| 14th Dec 2006 10:31 pm |
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10forcash
Member Since: 09 Jun 2005
Location: Ubique
Posts: 16534
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TMC seems the likely culprit.... check yer road preferences too....
Might seem a daft question, but why use sat-nav for a route you already know? Must admit I do use mine for regular journeys but only so I can advise Mrs.10 of ETA (and so she an be stood at the door with a cold beer  ) although I don't really take any notice of the directions...
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| 14th Dec 2006 10:49 pm |
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LT
Member Since: 31 Dec 2005
Location: South West
Posts: 23385
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Thanks for the replies. I have TMC set "ON" & Preferences set to cover all options.
It's possible that the slip road off J19 had previously been shut, so that could have been the reason.
I actually used it to get me out of Cardiff onto the M4 as I was in an area of Cardiff I didn't know. But I also wanted to test the system, as I've been given some routes, that when subsequently checked against a map just don't make sense at all.
Perhaps It's just a system. It's so clever in so many ways, except for giving logical routes  .
For example I'm often following a route & I can see on the screen map that if I turned off I'd cut out 2/3rds of a triangle. Yet the highlighted (green) route would take me the long way round the triangle, in some cases this could be many miles.
I really have very little confidence in the system.
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| 15th Dec 2006 1:28 am |
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mrmarklin
Member Since: 29 Nov 2006
Location: People's Republik of Kalifornia
Posts: 168
  
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All SAT NAVs seem to have similar problems. I've a BMW and it will occasionally route me in a very slow manner. Sometimes the changing the route selection options will optimize, more often that not, no! Same on my Jeep Grand Cherokee Ltd. I no longer have it, (Traded for LR3!) but I remember one time being routed through countryside to a destination that was only a couple freeway exits from where I was! SAT NAVs are quirky, and I doubt the Land Rover's is worse that any others.  '06 LR3 4.4 V8 HSE Heavy Duty package, Satellite Radio, Luxury Package
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| 15th Dec 2006 3:18 am |
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ronp
Member Since: 29 Nov 2006
Location: North Yorkshire
Posts: 15214
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I mentioned in a previous post:-
going anywhere I normally do a left turn out of my drive [on a fairly main rd]. The sat nav asks [sorry it's a woman -TELLS] me to turn right, then takes me on a square route through a local housing estate, just to turn me back 50 yds down the road from my house!! I was a normal heterosexual chap, but in these new woke awakenings I now identify as a Wardrobe.
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| 15th Dec 2006 9:51 am |
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Doctor Diesel
Member Since: 23 Sep 2006
Location: Driving the kids around as usual
Posts: 1587
 
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Having used several I can conclude:-
Least sensible...destinator.....clearly programmed by someone not spatially aware of where the were in time and space!
BMW (E60 535d) ok, occasional wacky routes but tmc very good usually
garmin streetpilot......crap infact worse than crap
tomtom 300...very good, sensible most of the time
tomtom 910....really superb around these parts...very rarely made mistakes
D3......I'll see how it does tomorrow
25 Hrs and counting! 2007 HSE Java Black.....sold
2007 B150 Horizon Blue
2008 Toyota Aygo Platinum
--------------------------------------------------
The Master of Suave !
Ding-Dong Matron
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| 15th Dec 2006 10:06 am |
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AndrewS
Tarquin of the Desert
Member Since: 06 May 2005
Location: Y...... because I can
Posts: 10438
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I input my destination and then ignore the sat nav until the last few miles or so. Mind you I do this with every Sat Nav I use.
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| 15th Dec 2006 10:29 am |
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Gareth
Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26705
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Me too, ignore until destination. TMC would be a great system, if it was up dated in real time. Its obviously gets its messages from the same source as the new big motorway gantry's that are regularly out of synch with real events.
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| 15th Dec 2006 11:32 am |
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simon
Member Since: 11 Jan 2005
Location: Shropshire
Posts: 18296
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ditto Andrew and Gareth... use my TomTom 710 to get to where I need to be once I get closer. I've driven enough routes around England to know the essentials of getting to the actual town/city.
Only use the TomTom when I get to unfamiliar territory.
Oh and yes Iain... same as you, useful for the ETA on the way home or working out how long a particular trip is going to take. I don't get a beer though  usually food and a bottle of red warming up near the Aga 
One thing I've noticed... no matter if you drive within speed limits or blow them away, the ETA is usually within a few mins either way. So little point in speeding.
Unless you want to have some fun of course
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| 15th Dec 2006 1:29 pm |
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Tonyrec
Member Since: 01 Jan 2005
Location: Hertfordshire,UK
Posts: 263
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We have noticed this as well.
It has on a couple of occasions tried to send us on a 5 mile detour when in fact the next left turn is an A road and perfectly ok.
The second time it did this we had our TomTom sitting next to it and the TomTom took us the correct way.
On a scale of 1 to 10 i will give it a 5. Im not that impressed and im starting to believe that it is a 'budget' system.
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| 15th Dec 2006 2:46 pm |
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simon
Member Since: 11 Jan 2005
Location: Shropshire
Posts: 18296
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But at least you can help a plane navigate with the D3
And they can fly in straight lines too so should be extra hard for it.
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| 15th Dec 2006 3:22 pm |
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jeff
Member Since: 18 Jun 2005
Location: Cornwall
Posts: 393
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Well I do like having the Satnav, found it really useful in central London and in Paris, however on the French trip it did throw up a very strange anomaly routewise.
I asked it to take us from Cornwall to just east of Paris with the bias toward major roads, the 'normal' route took us up the M5 past the M4 to Bromsgrove, then east on the M42, then things got really bizarre, it advised to carry on onto the M40 to Warwick, to exit the motorway, go around the roundabout and back on at the same junction heading back toward where we'd just come from! we were then supposed to go North back on the M42 past Solihull ( this is still Cornwall to Paris remember!) and finally east on the M6 and then south on the M1 linking with the M25 and through the Dartford tunnel, total mileage 676 miles, what the heck is at that roundabout on the M40 at Warwick that my disco so desperately wants to see  D3 TDV6SE
Defender 110 V8 lpg
www.carlyonbay.net
www.thepavillioncarlyonbay.co.uk
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| 15th Dec 2006 10:22 pm |
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simon
Member Since: 11 Jan 2005
Location: Shropshire
Posts: 18296
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jeff wrote:what the heck is at that roundabout on the M40 at Warwick that my disco so desperately wants to see
A big sign saying "April Fool" 
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| 15th Dec 2006 11:17 pm |
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