Citroen C4: Road signs recognition

For more information, refer to the General recommendations on the use of driving and manoeuvring aids.

This system displays the maximum speed authorised locally on the instrument panel, using:

- Speed limit signs detected by the camera.

- Speed limit information from the on-board navigation system's mapping.

- Speed limit information from the connected services.

- Signs indicating a shared traffic zone detected by the camera.

- Some supplementary traffic signs detected by the camera.

To get valid speed limit information, the vehicle's current position is sent via the telematics unit and is immediately deleted after processing.

Tracking of the vehicle position is not possible at any time.

This is not impacted by the privacy settings of the connected services.

On-board navigation mapping should be regularly updated in order to receive accurate speed limit information from the system.

The units for the speed limit (mph or km/h) depend on the country you are driving in.

This should be taken into account to ensure you observe the speed limit.

For the system to work properly when changing countries, the speed unit of the instrument panel must match that of the country you are driving in.

Country selection is only available for audio systems without on-board navigation.

Automatic sign reading is a driving aid system and does not always display the correct speed limits.

The speed limit signs present on the road always take priority over those displayed by the system.

The system is designed to detect signs that conform to the Vienna Convention on road signs.

Specific speed limits, such as those for heavy goods vehicles, are not displayed.

The display of the speed limit on the instrument panel is updated when passing a speed limit sign intended for cars (light vehicles).

• Information displayed on the instrument panel
• Settings
• Speed setting recommendations

Information displayed on the instrument panel

1. Detected speed limit indication

or

2. End of speed limit indication

The system is active but is not detecting speed limit information.

On detecting speed limit information, the system displays the value, accompanied by an audible signal.

This audible signal is emitted if the Speed limit change sound is activated previously in the Road Signs function of the ADAS touch screen application.

For a suggested maximum speed, when the vehicle exceeds it, the speed is displayed and flashes for several seconds.

If the vehicle continues to exceed it, the speed is displayed and flashes for a few more seconds, accompanied by an audible signal.

Operating limits

The system does not take account of reduced speed limits, especially those imposed in the following cases:

- Atmospheric pollution.

- Towing.

- Driving with a space-saver type spare wheel or snow chains fitted.

- Tyre repaired using the temporary puncture repair kit.

- Young drivers.

The system may not display the speed limit if it does not detect a speed limit sign within a preset period and in the following situations: - Non-standard road signs.

- Road signs that are obstructed, damaged or bent.

Settings

Deactivation/Activation

By default, the overspeed alert sound is automatically activated at every engine start.

 With Touch screen BLUETOOTH audio system or MyCitroën Play

The settings are changed via the Driving touch screen menu.

 With MyCitroën Drive Plus

The settings are changed via the ADAS touch screen application.

The system cannot be deactivated.

The speed limit change sound is saved when the ignition is switched off.

In the event of the overspeed alert sound deactivation, this warning lamp lights up a few seconds on the instrument panel.

Country selection

The list of detected road signs can be updated by selecting a specific country.

 With Touch screen BLUETOOTH audio system

► In the Driving touch screen menu, select Security>Panels Detection>Country settings.

► In the Select Country list, select the desired country.

 With MyCitroën Play

► In the Driving touch screen menu, select Driving Functions>Country settings.

► In the Select Country list, select the desired country.

 With MyCitroën Drive Plus

► In the ADAS touch screen application, select Functions>Road Signs>Country setting.

► In the Select Country list, select the desired country.

The current country is displayed under the function name in the settings screen.

The country selection is saved when the ignition is switched off.

Malfunction

This warning lamp lights up on the instrument panel with the message "Audible Warning System fault: Repair needed" if the audible warning system is in failure.

The system may be disturbed or unavailable.

Have it checked by a CITROËN dealer or a qualified workshop.

In the event of a malfunction, this warning lamp lights up on the instrument panel, accompanied by the display of a message and an audible signal.

Have it checked by a CITROËN dealer or a qualified workshop.

This warning lamp lights up on the instrument panel with the message "Driving Assistance Sensor blind: Clean sensor, see User Manual" if the sensor is masked.

This is a normal behavior, which does not request the support of a qualified workshop.

In this case, stop the vehicle and verify if the front camera is covered by dirt, mud, sand, snow, ice or anything preventing the sensing.

The system is operational again after the detection field has been cleaned.

Speed setting recommendations

The driver can select the speed displayed by the Road signs recognition system as the speed setting for the speed limiter, cruise control or adaptive cruise control using the OK button.

If rain is detected, the system proposes a speed setting to the driver which is lower than the speed read/sent from the mapping system in order to adapt to the weather conditions (e.g. on motorways, the proposed speed is 68 mph (110 km/h) instead of 81 mph (130 km/h).

For more information on the Speed limiter, Cruise control or Adaptive cruise control, refer to the corresponding sections.

Steering-mounted controls

1. Select speed limiter mode
2. Select cruise control mode
3. Memorise the speed setting

Information displayed on the instrument panel

4. Current speed setting
5. Speed memorisation prompt
6. Current speed limit indication

Memorising the speed setting

► Switch on the speed limiter 1-LIMIT or cruise control 2.

Information related to the speed limiter or cruise control is displayed.

When a new speed setting is detected, the system displays the value and "OK?" to suggest saving it as a new speed setting.

If there is a difference of less than 3 mph (5 km/h) between the speed setting and the speed displayed by the Road signs recognition, the "OK?" symbol is not displayed.

Depending on the road conditions, several speeds may be displayed.

► Press 3-OK to confirm the new speed setting.

The display then reverts to its previous state.

Extended Traffic Sign Recognition

For more information, refer to the General recommendations on the use of driving and manoeuvring aids.

This additional system recognises these road signs and displays them on the instrument panel.

As you approach it, the symbol of the corresponding sign is displayed on the instrument panel.

The selected display mode must be "Driving".

The actual road signs always take priority over those displayed by the system.

The signs must comply with the Vienna Convention on road signs.

Activation/Deactivation

 With Touch screen BLUETOOTH audio system or MyCitroën Play

The settings are changed via the Driving touch screen menu.

 With MyCitroën Drive Plus

The settings are changed via the ADAS touch screen application.