<P> City Safety is an auto brake technology that assists in reducing or avoiding traffic accidents at speeds up to 30 km / h (19 mph) in vehicles using City Safety Generation I. Later models using City Safety Generation II can stop at 50 km / h (31 mph). All cars sold by Volvo Cars 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 Volvo Cars . 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 laser sensor that monitors an area approximately 6 m (20 ft) 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 . If the relative speed between the two vehicles is 15 km / h (9.3 mph) or less, a collision may be avoided completely . If the relative speed is above 15 km / h (9.3 mph) and up to approximately 30 km / h (19 mph), the consequences of the collision may be reduced considerably . Keep in mind that these values only applies to City Safety Generation I . </P> <P> The system has several factors that should be kept in mind . </P>

What does auto braking by city safety mean
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