On October 7, 2025, I was driving to work. There was a steel metal plate of approximately 1 inch height lying flat on the roadway, presumably to cover up a pothole or other utility work. The steel metal plate was near an intersection where I was to be turning left. I was driving relatively slow as it was almost time to make the left turn, about 15-20 mph. When I was almost upon the steel metal plate my car braked to a complete stop because of the Collision Mitigation Braking System. The intense deceleration has had my back in pain all day, and my neck is slowly starting to hurt as well. I feel like I was in a car accident from how quickly my car came to a stop over what appeared to be the steel plate tripping the CMBS. My vehicle is available for inspection upon request. My safety was at risk due to the back and neck pain I am currently experiencing. If a car had been driving behind me, I would have almost certainly been rear ended which could have created further injury. This feature cannot be permanently disabled and needs to be able to be. It's an undue burden on the driver of the car to have to turn it off every time the car starts. I am concerned someone else will drive my car and not know to turn off that feature and they will be injured or in an accident.