City Safety is an auto brake technology that assists in reducing or avoiding traffic accidents at speeds up to in vehicles using City Safety Generation I. Later models using City Safety Generation II can stop at . All cars sold by

Volvo Cars Volvo Cars ( sv, Volvo personvagnar, styled VOLVO in the company's logo) is a Swedish multinational manufacturer of luxury vehicles headquartered in Torslanda, Gothenburg. The company manufactures SUVs, station wagons, and sedans. The company's ...

with a Model Year of 2014 or later is equipped with City Safety Generation II, with an exception of the XC90 (2002-2014). City Safety is made by

. The Volvo V40 was the first car to make use of City Safety Generation II when it was released 2012, and since then other cars in the line up has gotten the same system. It uses

lidar Lidar (, also LIDAR, or LiDAR; sometimes LADAR) is a method for determining ranges (variable distance) by targeting an object or a surface with a laser and measuring the time for the reflected light to return to the receiver. It can also be ...

laser sensor that monitors an area approximately directly in front of the vehicle. The feature is programmed to respond if the car in front is either at a standstill or is moving more slowly in the same direction as the car itself. If City Safety determines a collision is unavoidable and the driver does not respond, it activates the vehicle's brakes and switches off the

throttle A throttle is the mechanism by which fluid flow is managed by constriction or obstruction. An engine's power can be increased or decreased by the restriction of inlet gases (by the use of a throttle), but usually decreased. The term ''throttle'' ...

. If the relative speed between the two vehicles is or less, a collision may be avoided completely. If the relative speed is above and up to approximately , the consequences of the collision may be reduced considerably. Keep in mind that these values only applies to City Safety Generation I. The system has several factors that should be kept in mind. *When City Safety applies the brakes, the brake lights are flashing rapidly to inform drivers behind about emergency braking. *In cases where City Safety has stopped the vehicle, it will then release the brakes after about 2 seconds and the driver must apply the brakes to keep the vehicle at a standstill. *It is always on at start-up and can be deactivated in the "Car Setting" menu. *It does not respond to oncoming traffic. *The driver can override City Safety by aggressively steering, accelerating, or braking. *City Safety's performance is not affected by darkness or light, but may be affected by weather conditions such as heavy rain, fog, or snow. *The windshield needs to be clean and should remain free of any flags or decals. *The driver is always responsible for controlling the vehicle and should never rely solely on the City Safety auto brake feature. *Under normal driving condition, the feature is transparent to the driver and there are no settings to change. *City Safety may help drivers avoid

rear-end collision A rear-end collision (often called simply rear-end or in the UK a shunt) occurs when a vehicle crashes into the one in front of it. Common factors contributing to rear-end collisions include driver inattention or distraction, tailgating, panic ...

s and prevent

whiplash injuries Whiplash is a non-medical term describing a range of injuries to the neck caused by or related to a sudden distortion of the neck associated with extension, although the exact injury mechanisms remain unknown. The term "whiplash" is a colloqu ...

to passengers in the car ahead, as well. *City Safety may reduce the cost of ownership due to reduced insurance rates and lower repair costs."Crash avoidance features reduce crashes, insurance claim study shows; autonomous braking and adaptive headlights yield biggest benefits"
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References

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External links

Preventing accidents > Our preventive safety systems > City Safety"">"Safety > Preventing accidents > Our preventive safety systems > City Safety"
* ttp://www.caradvice.com.au/131522/volvo-s60-safety-review/ "Volvo S60 City Safety review"br>"High-tech system on Volvos is preventing crashes"
Volvo Cars Automotive safety