Our vehicle is equipped with the "smart city braking" feature that automatically prevents collisions at low speed. this system triggers the brakes and brings the vehicle to a stop when an object is detected in front of the vehicle. this system has been triggered by steam clouds coming out of sewer grates and has brought the car to a complete and very unexpected stop several times. no real "object" was behind the steam cloud / yet because of the way the system is implemented it detected an object and activated the brakes. this unexpected braking can quickly bring the car to a complete stop and could result in serious property damage or injury. we pass by an area with multiple sewage grates releasing steam and this system is becoming a safety hazard. we have been lucky enough not to have someone behind us when the system is triggered - but it is only a matter of time before the braking triggers in heavy traffic. *tr