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TMC for London Area

 
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Bazman76
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Joined: May 08, 2008
Posts: 4

PostPosted: Thu May 08, 2008 12:31 pm    Post subject: Any system tath works well in the London? Reply with quote

Hi,

I am considering getting a new system and would like it to have a working TMC system for use in teh London area.

Deos any company offer this service for free? Or are they all subscription based? If so which is the best value?

Baz
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GPS_fan
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Joined: Jan 04, 2007
Posts: 2789
Location: Hampshire, UK

PostPosted: Thu May 08, 2008 12:36 pm    Post subject: Reply with quote

TMC is a commercial venture operated by two companies (TrafficMaster and iTIS) - this is either included in the price of a GPS device or a subscription service, there is no free service.

Some GPS manufacturers will also allow traffic information via GPRS, which doesn't rely on the FM/RDS signal reception (which can be patchy or non-existent in places).

The value of this service will depend upon the GPS manufacturer and how they work the TMC subscription (ie whether a lifetime subscription is included in the purchase price or if it's an ongoing subscription)

Does this help??


post moved to its own thread to avoid it getting 'lost' in the thread in which it was originally posted - GPS_fan
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Bazman76
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Joined: May 08, 2008
Posts: 4

PostPosted: Thu May 08, 2008 1:20 pm    Post subject: Reply with quote

Thanks things are a little clearer.

So which system is best in your opinion GRPS or th FM/RDS service?

Also is GPRS costs included in the subscription or do you have to pay for those on top?

I'd be keen to hear from you or anyone who has used any such system in the London area and has positive things to say about it. So far most reviews seem pretty negative.
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Bazman76
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PostPosted: Thu May 08, 2008 1:22 pm    Post subject: Reply with quote

Also does anyone kjnow how the RDS-TMC traffic signal reciever compares against TomTom's traffic plus service?

Again I'm looking primarily for peoples experiences in the London area?
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Pocketgps
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Joined: Nov 16, 2004
Posts: 2145
Location: Midlands, UK

PostPosted: Thu May 08, 2008 3:00 pm    Post subject: Reply with quote

I have a Medion gps that includes the TMC service on it, included in the price of the unit.

Just turned it on and waited about one minute and have received about 24 warnings for the London area alone. I am in the Midlands at this time.

The unit gives you the option to receive a message if navigating in the warning area or it will re-calc the route if set to auto mode in the TMC settings.

It has worked just fine around the Manchester area on several occasions. Even getting me off the motorway before slow or stationary traffic.

Some typical screen shots of the info that can be show on the Medion:







I don't know what other systems show as this is the only one I have with TMC on it.
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DennisN
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Joined: Feb 27, 2006
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PostPosted: Thu May 08, 2008 11:31 pm    Post subject: Reply with quote

There seem to be three considerations of Traffic services.

First, receiving the service. From a post above, it seems the Medion receives it. From recent experience, the TomTom RDS-TMC is subject to radio transmission coverage (and is poor). By contrast, the TomTom GPRS service is via your mobile phone, so if you get a good signal in the area which interests you, then you'll get good GPRS transmission. TT's RDS_TMC service is paid for as soon as you buy the antenna, remaining service is free for life. GPRS service is by annual subscription. GPRS service also costs you for data downloaded from your phone service provider - on a suitable contract it'll be peanuts, on an unsuitable contract it'll be costly.

Secondly, the quality of the information. It will never be instant and up to date, by the very nature of the way traffic happens - how do "they" get to hear of a traffic problem and how soon do they transmit that information to the Traffic Service? I have to say that in my experience, the Radio Five traffic reports at 15 and 45 minutes past the hour are just as good (and of course, free). Additionally, Radio Five tells you a phone and text number so you can report traffic problems for other people's benefit. There is no such reporting facility for TomTom, I don't know about anybody else.

Thirdly, how the information is presented to you. The medion system above seems to be listings that you have to sort through, but I have no experience of it so perhaps it would be best for Pocketgps to pass comment on this aspect. In the case of TomTom, their intention is to present the problems on your route - a bar on the side of the screen indicates the problems ON YOUR ROUTE, with an indication of the time delay to be suffered from them, together with an option for you to instruct the TomTom device to navigate around the problem. Unfortunately, the present RDS-TMC system is faulty (to the extent that it's useless). It may indicate a problem, but will not indicate how long it might delay you, alternatively, it will indicate a quite unrealistic delay, based on some cockamamy theory that a lane closure = xx minutes delay for every mile of lane closure. The TomTom GPRS service seems to be reported as working correctly - I don't have it, so can't comment.
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GPS_fan
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PostPosted: Fri May 09, 2008 1:24 pm    Post subject: Reply with quote

DennisN wrote:
The medion system above seems to be listings that you have to sort through, but I have no experience of it so perhaps it would be best for Pocketgps to pass comment on this aspect.

This may not be the case, Dennis, some systems allow you to decide how to view incidents - by distance, by type etc

Since Pocketgps' avatar shows location as the Midlands, I suspect they might have their view sorted by distance, whereby M6 is closer than M25.

...but I could be wrong
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Kremmen
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Joined: Mar 03, 2006
Posts: 6496
Location: West London & Reading

PostPosted: Fri May 09, 2008 3:00 pm    Post subject: Reply with quote

Quote:
the quality of the information. It will never be instant and up to date,


I can verify that, my daily journey takes in the M25 during the evening rush.

I am running a RDS-TMC unit and a TrafficMaster Q-Busta.

Along the western section of the clockwise M25 the RDS-TMC will inform me that the start of the jam is at J15 wheras the Q-Busta tells me the jam starts at J13 and the Q-Busta is always more accurate.
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