| davidcookoz@yahoo.com.au 2006-10-29, 3:33 pm |
| I think cross posting to this group is appropriate as people in here
may have a Garmin nuvi 660 or a NavMan n60i and be able to answer the
question ;-)
davidcookoz@yahoo.com.au wrote:
> As per my other post I've been looking into Sat Nav with integrated
> traffic functionality. Most devices seem to use the RDS-TMC system to
> provide traffic information to the devices. I understand that RDS-TMC
> is a system where Traffic Message Channel (TMC) services - receive
> Traffic Message Channel (TMC) data via FM radio broadcasts. There
> seems to be different providers of the actual data, and Garmin (only I
> think) use RDS-TMC data supplied by TrafficMaster which is claimed is
> better quality data [1]
>
> My question on the devices that use this is does it provide information
> in mapping format similar to that available from TrafficMaster's
> Monitor Product [2] in TrafficMaster.net style [3]
>
> The reason I ask is because I understand that with products like
> TrafficMaster Monitor [2] and TrafficMaster Freeway (an audio device
> which talks to warn you of delays on the road ahead) get their data
> from the roadside units on the road you are on (in fact my unit bleeps
> every time it is updated) and I'm guessing that this data is very
> focused on where you are. Surely FM transmissions used by RDS-TMC
> cover a massive area (e.g. the area covered by BBC Radio Cambridgeshire
> for example) so do such broadcasts cover all traffic information for
> the entire region? Does RDS-TMC provide a level of accuracy of data
> equivalent to TrafficMaster monitor? Is it provided in a similar
> format to TrafficMaster Monitor.
>
> Perhaps if anyone is familiar with both systems they could advise?
>
> Cheers,
>
> David
>
> [1] http://www.trafficmaster.co.uk/shownews.cfm?num=369
> "Garmin chose Trafficmaster above other UK based RDS TMC providers
> because it believes that Trafficmaster offers the most accurate and
> robust traffic service."
>
> [2] Traffic Master Monitor
> http://www.trafficmaster.co.uk/page...erdot
net
>
> [4] NavMan n60i
> http://www.navman.com/Navman/Templa.../>
__47199.aspx
>
> [5] Garmin nuvi 660
> http://www.garmin.com/uk/automotive/nuvi660.htm
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