A vehicle safety system including a detection system and a related method. The detection system is arranged to detect objects and includes at least two detectors. At least one control unit is arranged to determine that an object that is detected by an initial detector is classified as a confirmed object for the initial detector in its initial coverage area. The control unit is also arranged to determine whether at least one detection of another detector is from the same object. If so, a first preliminary detection of the other detector is classified as an intermediate low quality confirmed object for the other detector. A confirmed object is considered as a more reliable detection than a low quality confirmed object, which in turn is considered as a more reliable detection than a preliminary detection.