Robbie wrote:

Causeway Grey is not in the current UK D4 brochure (dated July) so I guess it is replacing Orkney.
.

Quote:

RDS-TMC OVERVIEW

Radio Data System-Traffic Message Channel
(RDS-TMC) is a feature that announces traffic
hold-ups on your route as broadcast by radio
stations that transmit TMC information.
Touch the TMC button on the Navigation Menu
to access the TMC menu.

TMC events ahead on route can be displayed by
touching the Events ahead soft key. TMC can
be set to display on the map for all events, for
major events or can be switched off. During
route calculation. it can be set to avoid TMC
events along the route.

RDS-TMC DISPLAY

When a TMC signal is received the icon in the
top left of the screen will appear green. If a TMC
signal is not being received, the icon will be
shown with a bar through it.
The system will inform the driver of any
reported roadworks, narrow road, contraflow,
accidents, slippery road, diversion,
information, parking information, congestion
or other hazard.

The driver is informed of a traffic event as
follows:
• A TMC Event icon shown on the map at the
location of the event.
• Text can be displayed showing the details
of each occurrence which can be selected
either by touching the screen icon or from
the traffic information list.
• Dynamic route guidance, which calculates
an alternative route when the system
receives the traffic event warning affecting
the route currently set in the navigation
system.
• Traffic event list shows all events sorted by
road name/ distance on your selected route
in a straight line or along your actual route.
The information regarding the hold-up is
maintained and updated even if the vehicle
crosses into another country.

RDS-TMC ICONS

Any traffic event (broadcast on TMC) in your
area, will be displayed as a warning icon on the
map and an alert may be displayed as a
message giving the road number(s) and
between which junctions the hold-up or event
occurs.

This data is stored in the system for up to 30
minutes.

The colour of the TMC icon changes in order to
show the type and priority of a TMC event. The
background colour of the icon returns to
normal when there is no longer an event or
hold-up, or if any re-route instructions are
calculated.

The TMC Event icons appear on the navigation
map display to indicate the location and nature
of a TMC event.

TMC Event icons will appear on the map, even
if the event does not occur on your route.

LEVEL 1 TMC EVENT ICONS
Note: Single arrow icons indicate that the
traffic event affects traffic travelling in the
direction of the arrow. Double arrows indicate
that both directions are affected.

LEVEL 2 TMC EVENT ICONS
Incident (Red star)
Moving Tailback Ahead (Red
arrow)
Moving Tailback Both
Carriageways (Red double arrow)
Slow Traffic Ahead (Yellow arrow)
Slow Traffic Both Carriageways
(Yellow double arrow)
Information (Yellow circle)
Incident (Yellow star)
Stationary Traffic Ahead (Red
arrow pointing on line)
Stationary Traffic Both
Carriageways (Red double arrow
pointing on line)
Other Hazard (Yellow)
Roadworks (Pink)
Narrow Road (Pink)
Contraflow (Pink)
Accidents (Pink)
Slippery Road (Yellow)
Diversion (Yellow)
Parking Information (Grey)
Information (Grey)
Congestion (Red)

USING TMC

Dynamic route guidance will calculate an
alternative route to avoid a traffic event when
the system receives an event warning.The
system calculates a new route for all sections.
However, if any way points are set, the system
calculates for the next way point.If the event on
route is serious (closed road) or if the new
route is shorter than the current one and the
current one was not recalculated within the last
5 minutes, then a message to confirm the new
route will be displayed. This pop-up message
will be displayed for 10 minutes and if the new
route is not rejected, then the vehicle will follow
the new route.