Sign display with Road sign information
When RSI detects a road sign with an imposed speed limit, the driver display shows the sign as a symbol plus an indication in red on the speedometer.
Besides the speed limit symbol an additional sign may be shown as well, such as "no overtaking" or "no entry".
If the driver enters a road marked with a no-entry sign at the roadside, the symbol for this sign flashes on and off on the driver display as a warning.
The driver can also get an acoustic warning when driving towards a no-entry entrance if the Audio Warning function is activated - see the heading "Activating/deactivating the acoustic warning" in the section "Activating/deactivating Road sign information".
End of restriction or motorway
If RSI detects a sign which may imply the end of a speed limit, such as the end of a motorway, the driver display shows the corresponding road sign for 10–30 seconds.
Examples of such signs are:
End of all restrictions.
End of motorway.
Following which, the sign information is hidden until the next speed-related sign is detected.
Additional signs
Sometimes different speed limits are signposted for the same road - an additional sign then indicates the circumstances under which the different speeds apply. The road section may be particularly susceptible to accidents in rain and/or fog, for example.
An additional sign relating to rain is displayed only if the windscreen wipers are in use.
If the car has a trailer attached and you pass a speed sign with the additional sign “trailer”, the indicated speed will appear on the driver display.
Some speed limits only apply after a certain distance or at a certain time of day. The driver's attention is drawn to this fact by means of a symbol for an additional sign below the speed symbol. The additional symbol in the driver display will show either “DIST” or “TIME”.
A symbol for additional sign in the form of an empty frame under the driver display's speed symbol means that the RSI has detected an additional sign with supplementary information for the current speed limit.
Sensus Navigation
If the car is equipped with Sensus Navigation, speed information is read from the navigation unit in the following cases:
- On detecting signs that indirectly indicate a speed limit2, such as motorway, expressway, and city limit signs.
- If a previously detected sign is assumed not to apply any longer, but no new sign has been detected.