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Old 29th June 2016, 12:45   #21
SCP440
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Originally Posted by mystabe View Post
With regards to the traffic diversions I've had this a few times without any kind of wi fi connection and I don't get it if I'm on the same road travelling at normal speed, possibly if you are stationary or crawling along it has some free time to suggest alternative routes rather than having magical powers
That was my first though but it still offered me options when I was traveling at 70mph on a couple of occasions. As you say if you are doing 15mph on a motorway it does not take much logic to realise there is a problem but not at 70mph.

Could it be the RDS system or those blue boxes that monitor traffic flow.

Something is triggering it and it was not my mobile and I don't think it was WIFI.

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Old 29th June 2016, 13:13   #22
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That was my first though but it still offered me options when I was traveling at 70mph on a couple of occasions. As you say if you are doing 15mph on a motorway it does not take much logic to realise there is a problem but not at 70mph.

Could it be the RDS system or those blue boxes that monitor traffic flow.

Something is triggering it and it was not my mobile and I don't think it was WIFI.

Steve
Guys,

It's none of those.

The units receive traffic live data as I've already explained.

They do not receive it through the RDS data or the (now largely defunct) blue TMC transmitters dotted around our road networks
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Old 29th June 2016, 15:21   #23
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The simple answer is to go into settings and uncheck 'hstoric traffic data' and see if it still does it - I'm willing to bet it won't but
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Old 30th June 2016, 05:03   #24
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The simple answer is to go into settings and uncheck 'hstoric traffic data' and see if it still does it - I'm willing to bet it won't but
Nice one Dave
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Old 13th July 2016, 04:48   #25
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OK history was cleared, no mobiles on in the car and it did it again yesterday on the M25.

I was caught in a traffic jam and as I approached the M4 it gave me an option to avoid the congestion, I took the option and it took me on a route I did not even know existed.

As SWMBO said ''it is smoke an mirrors@@ but I like.
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Old 13th July 2016, 06:17   #26
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OK history was cleared, no mobiles on in the car and it did it again yesterday on the M25.

I was caught in a traffic jam and as I approached the M4 it gave me an option to avoid the congestion, I took the option and it took me on a route I did not even know existed.

As SWMBO said ''it is smoke an mirrors@@ but I like.
That, surely has to come from a Satellite signal!
making my post #5 correct
do we all agree on that then???
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Old 14th July 2016, 06:25   #27
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That, surely has to come from a Satellite signal!
making my post #5 correct
do we all agree on that then???
Ken.
No.......because it can't

The GPS system does not send traffic data
It's purely a system to triangulate a position

The only way you could receive traffic data is through the poles at the side of the road for TMC which have pretty much all been switched off, the Rds traffic data which is broadcast on the Classic Fm frequencies I believe or from an Internet connection or phone network connection.
So somehow if no internet is being used it must have got it from the radio broadcast which is news to me on the Navall3

It cannot receive it from the satellites, the Americans aren't nice enough to beam up live traffic from the whole world into space and then beam it back down again
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Old 14th July 2016, 06:30   #28
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No.......because it can't

The GPS system does not send traffic data
It's purely a system to triangulate a position

The only way you could receive traffic data is through the poles at the side of the road for TMC which have pretty much all been switched off, the Rds traffic data which is broadcast on the Classic Fm frequencies I believe or from an Internet connection or phone network connection.
So somehow if no internet is being used it must have got it from the radio broadcast which is news to me on the Navall3

It cannot receive it from the satellites, the Americans aren't nice enough to beam up live traffic from the whole world into space and then beam it back down again
So the "thick Ploterns"
It is all very interesting though.
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Old 14th July 2016, 06:41   #29
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That, surely has to come from a Satellite signal!
making my post #5 correct
do we all agree on that then???
Ken.
All the GPS satellites do is enable your GPS unit to work out where on the earth you are, by working out differences in time / time delays between your reception of each satellite - nothing more than that.

A separate part of your GPS system has the maps, which it can put on the display along with your reported by the GPS position on that map.

My first GPS system contained just the GPS reception unit, that output a text string of bare Lat/Long information, ASL and the time, which it did every second. I then fed that text string into an early laptop, which ran maps and calculated routes on the then very crude maps.
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Old 14th July 2016, 09:51   #30
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All the GPS satellites do is enable your GPS unit to work out where on the earth you are, by working out differences in time / time delays between your reception of each satellite - nothing more than that.

A separate part of your GPS system has the maps, which it can put on the display along with your reported by the GPS position on that map.

My first GPS system contained just the GPS reception unit, that output a text string of bare Lat/Long information, ASL and the time, which it did every second. I then fed that text string into an early laptop, which ran maps and calculated routes on the then very crude maps.
I understand all that Harry, also it does sound far fetched that thinking the GPS could know about congestion/delays.
Just curious and would like to see the reason why the OP gets the messages.
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