City Safety is our umbrella term for our standard collision avoidance functionalities. All City Safety functionalities are standard in the new XC40 and are always active above 4 km/h.
Avoiding or mitigating collisions with other vehicles
City Safety first warns the driver and then brakes automatically if the driver does not brake or steer to avoid vehicles (cars, motorcycles, trucks, buses) that are in front of the car, moving slower in the same direction, braking or not moving. At speed differences up to 60 km/h between the car and the vehicle in front, a collision can be avoided if the driver does not react.
At higher speed differences, the collision is mitigated. The driver can take control and brake and/or steer away at any time to avoid the collision. In speeds above 30 km/h, the front safety belts option are tightened (option in the XC40) to secure the driver’s and front seat passenger’s position option.
Avoiding or mitigating collisions with cyclists
If a cyclist swerves into or is stationary in the path of the car, the City Safety warns the driver and brakes automatically if the driver does not. The car’s speed can be reduced by up to 50 km/h and thereby avoid a collision.
Avoiding or mitigating collisions with oncoming vehicles in intersections
If the driver turns in front of an oncoming vehicle City Safety can assist by braking automatically, if the driver does not brake.
If a collision is imminent, the front safety belts are tightened (option in the XC40) to secure the driver's and front seat passengers' position.
Avoiding or mitigating collisions with pedestrians
If a pedestrian moves into, or crosses the path of the car, or is stationary in the path of the car, City Safety warns the driver and brakes automatically if the driver does not, at speeds up to 80 km/h. A collision with a pedestrian can be avoided at speeds up to 45 km/h. For speeds between 45 and 80 km/h, the collision is mitigated.
In addition to detecting vehicles, cyclists and pedestrians, City Safety also includes detection of large animals, like moose, elks and horses. The standard-fitted radar/camera unit can detect large animals standing on the road or slowly moving across it with the side towards the car. If a large animal is detected, the system warns the driver. When the driver brakes, additional brake pressure is provided to support avoidance if needed.
If the driver does not react the car applies the brakes to mitigate the possible effects of an impending collision. In this way collisions with large animals can be avoided or mitigated. The car’s speed can be reduced by up to 15 km/h. If a collision is imminent, at speeds above 30 km/h, the front safety belts are tightened (option in the new XC40) to secure the driver’s and front seat occupant’s position..
This system helps the driver avoid collisions with oncoming vehicles by assisting them to steer back into their own lane.
If the car drifts over a lane marking, heading into the path of an oncoming vehicle and the driver takes no action, this system automatically steers the car back into its own lane.
A message is shown in the driver display after the steering intervention has been completed. The driver can override the automatic steering at anytime.
The system is active at speeds between 60 and 140 km/h, requires a visible lane marking and detects oncoming four-wheeled vehicles.
Run-off road accidents are amongst the largest cause of single vehicle accidents. To combat this, Volvo Cars has developed two support systems aimed at helping to avoid a run-off road accident from taking place, or protecting the car’s occupants in the case of an unavoidable road departure.
The Run-off Road Mitigation function is designed to help prevent unintentional road departures at vehicle speeds between 65-140 km/h.
Run-off road accidents are amongst the most common type of single-vehicle accidents. Reasons for such accidents include driver inattentiveness, fatigue or poor weather conditions.
When a potential run off road situation arises torque can be applied to the steering to support the driver along with braking action. The system can always be overridden by the active intervention of the driver.
Run-off Road protection focuses on accidental road departure. Using input from the car’s advanced sensor system, the technology is able to detect a run off road scenario.
When an unavoidable run off road situation arises the front safety belts are electrically tightened (option in the new XC40) as much as possible to keep the occupants in position.
To help reduce spine injuries Volvo has designed the seat structure to deform mechanically to cushion the vertical forces that can arise when the car encounters a hard landing in the terrain.
Based on real-life data, Volvo Cars has developed three complete vehicle crash test track methods, called Ditch, Airborne and Rough terrain, for evaluating the consequences of various Run-off Road protection scenarios.
Lane Keeping Aid is a standard-fitted system that helps the driver to keep the car in its lane by gently steering the car back if it is about to cross a lane marking if the car senses that the driver is not driving actively, or for example, using their indicators.
If the supplied steering intervention is insufficient the driver is alerted by vibrations in the steering wheel.
The system uses the windscreen-mounted camera and relies on visible lane markings. This system can be switched off in the car settings and feedback can be set to vibration of the steering wheel only, vibration and intervention or just intervention.
The system is active between 65-200 km/h.
Volvo Cars has always approached product development from a human-centric perspective, utilising the best available technologies to deliver meaningful and useful features and services in the car. With arrival of in-car connectivity, Volvo Cars believes that this can deliver not just added services – but added safety and peace of mind. Connected Safety information is presented to the driver via pop-up icons in the driver display.
For Connected Safety to function the car must have a connection to the Internet. We are developing a number of systems designed to make driving safer and more enjoyable. Here are two examples of existing offerings within the area of Connected Safety.
The purpose of Slippery Road Alert is to increase the driver's awareness of both current road conditions and those on the road ahead.
Road friction is measured during steering, braking and/or acceleration. If the friction is below a certain level, the driver receives a slippery road alert in the driver display.
The cloud sends slippery road alerts to connected Volvo cars approaching a low friction zone.
The purpose of Hazard Light Alert is to alert the driver about vehicles on the road ahead that have their hazard lights activated.
Awareness of vehicles along the road ahead makes it possible for the driver to prepare and adapt his/her driving style to safely handle the situation.
*Slippery Road Alert and Hazard Light Alert are available in Sweden and Norway.
At Volvo we understand that you have a lot on your mind sometimes. This is why we have developed Road Sign Information and Speed Limiter features to help remind you of the current speed limit.
Road signs the driver is passing are displayed in the lower part of the speedometer, or on the Head-up display, if fitted. The system can display European and US speed limit signs – including variable speed limit signs – and supplemental sign information, as well as some of the more important European prohibition signs.
The driver can activate/deactivate a speeding alert in the menu system, including a desired offset speed to the detected speed limit. If speeding alert is activated and the driver exceeds the limit, plus the chosen offset, a speed limit sign icon will flash in the speedometer. Information about speed cameras is automatically presented when Road Sign Information is activated. If the speeding alert function is activated and the car exceeds the speed limit when approaching a speed camera, a speeding alert warning is issued as described above. No offset speed is considered when approaching speed cameras.
If the car is equipped with Sensus Navigation, speed limit information is fetched from the navigation unit and combined with the speed signs detected by the camera.
The driver can activate a warning sound for the no-entry sign warnings and speeding alert (disengaged by default).
This function limits the speed of the car to that set by the driver, or set automatically with information from the Road Sign Information system.
The driver can exceed the set limit by depressing the accelerator fully for a moment and then choose to drive above the set speed. This is useful for overtaking manoeuvres. When the speed falls below the set speed, the Speed Limiter will resume its function. The set speed is shown in the Driver display.
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