How often do you get this kind of instruction?

TraceT

Travelling southbound through Rotherham, I was instructed to take a left and two rights less than 300 yds apart only to end up on the road I was already on. I 'm familiar with this road so I ignored the instruction{although it's probably the map data TomTom had at the time it was made}. What I want to know is; does this happen often as wouldn't know any different in an unfamiliar area. Confused

Robin2 · Posted: Thu Apr 06, 2006 1:33 pm Post subject:

Obviously it thinks there's no right turn at the fork.
I've not had this happen with TomTom, but I have encountered something similar with Mapopolis. Strangely, CoPilot doesn't do it at the same junction, though they both get their map data from Navteq.
Robin
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TraceT · Posted: Thu Apr 06, 2006 3:06 pm Post subject:

Thanks for your reply Robin,

You don't actually turn right at the "fork" as it's the same continuous road, you stay in the right side lane to carry on south as it's now like a dual carriageway. The "fork" is actually only for a left turn if your travelling southbound. It used to be a bog standered junction til they implemented dual lanes, actually qiute some time ago.

I'm still interested to hear from anyone else experiencing a similar instruction in other parts of the country, so I can be aware Smile

.

alan_sh · Posted: Thu Apr 06, 2006 4:49 pm Post subject:

Coming down the M56 from Chester to Manchester, I was told to come off at J9 only to see that I was to go back on to the M56 again...

No idea why and I ignored it.

This is with TT5 and the maps that came with my purchase last year.

TraceT · Posted: Thu Apr 06, 2006 5:02 pm Post subject:

hmmn, Thanks any way

Its strange to me why too but interesting to know.
I only bought my package last December.
The road I go on has been like it is now for the last few years at least. It was a simple junction on the left now it forks to that road. Still can't understand why TomTom would want to navigate off to come back on 300yds further down. To me it clearly shows the route you can take with the little black arrows on the maps.

Border_Collie · Posted: Thu Apr 06, 2006 5:38 pm Post subject:

I just did a check for Quickest and Shortest route and both routed the same as yours TraceT

elyl · Posted: Thu Apr 06, 2006 7:24 pm Post subject:

In the USA at the moment, and was routing home from Orlando to Tampa, on the interstate it told me on 3 seperate occasions to take the off-ramp and go directly back onto the interstate again. I remember this happening a fewt times back in the UK on various routes. I can't understand how this bug occurs!

Border_Collie · Posted: Thu Apr 06, 2006 8:48 pm Post subject:

I have a theory. Not sure if it's valid. Confused

Imaging going from A to B on level ground and say it takes 'x' seconds.

Now imagine the same road but going up a hill (or down one). The fact is the hill, although the same distance, would show you've travelled faster than you actually have. This in turn would show the quickest route as being via the ramps.

So by being directed up an exit ramp and then down on the entry ramp, the system thinks it's faster.

To see the effect, point your index fingers towards each other then place one above the other. Same length. Now raise the top one to say 45 deg. Next turn your hands so you can look down on your fingers. Lo and behold the top one looks relatively shorter.
Wink

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andy-c1 · Posted: Thu Apr 06, 2006 9:12 pm Post subject:

yes i've had that before once near hythe and the other is on the m25 although you don't actually leave the m25 it just tells you to keep left then keep right
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TraceT · Posted: Thu Apr 06, 2006 9:18 pm Post subject:

Border_Collie · Posted: Thu Apr 06, 2006 9:20 pm Post subject:

TraceT · Posted: Thu Apr 06, 2006 9:31 pm Post subject:

Border_Collie · Posted: Thu Apr 06, 2006 9:36 pm Post subject:

julianbarker · Lifetime Member Joined: Apr 12, 2005 Posts: 431

It did this to me when turning right at Old Sarum when approaching from the North. I did not know the junction so assumed TT knew it was no right turn - was sent round some narrow back streets and back on the main road, now approaching fro mthe South - only to have to stop to let someone turn right intothe road I was aiming for all along!

TraceT · Posted: Fri Apr 07, 2006 2:23 pm Post subject:

The only thing I've found useful to see what your letting yourself infor is to browse the journeymap demo before you depart, but not knowing whether a two street has become a one way etc is no good at all in an unfamiliar area. Other peoples experiences are nice to know to boost your own knowledege!

Thanks too everyone for sharing your experiences with me, I can become more aware of these peculiararitites. Smile

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