Safety system for vehicles

The invention relates to a method of avoiding collisions with persons and physical objects when operating a vehicle, comprising a vehicle equipped with at least one sensor, where persons and physical objects are equipped with a reflective device, and comprising the following steps: (a) illuminating an area, with a light source arranged on the vehicle, where the light source has a defmed wavelength, (b) registering a first image of the area being illuminated, with a sensor arranged on the vehicle, where the sensor is adapted to the wavelength of the light source, (c) registering a second image of an area, with a sensor arranged on the vehicle, (d) detecting, in a calculating device arranged on the vehicle, persons or physical objects equipped with the reflective device through comparison of the first image and the second image, (e) determining, in a calculating device arranged on the vehicle, whether the detected objects are persons or physical objects, (f) communicating information about detected persons or physical objects. The invention further relates to a safety system and a vehicle equipped with a safety system.