My Volvo has sign recognition, and although it is quite good, it frequently gets it wrong. It will pick up signs on the back of lorries/buses, as well as signs

My Volvo has sign recognition, and although it is quite good, it frequently gets it wrong. It will pick up signs on the back of lorries/buses, as well as signs for i.e. a neighborhood (5kmh) without subsequently picking up the fact that I have moved out of that area, and am now allowed 50kmh. If this erroneous behavior would translate to limited speed, I'd be extremely unhappy.