System comprising vehicles, wherein each vehicle comprises a controllable light source and sensor units, wherein the sensor units of each vehicle are suitable for receiving light emitted by the controllable light source of another vehicle, wherein each vehicle comprises a respective evaluation unit for evaluating the sensor signals, wherein each sensor unit is arranged on the particular vehicle in a manner spaced apart from one another along a curved and/or domed surface, and has an orientation of which the angular distance from a direction set on the vehicle, in particular the direction of travel during travel in a straight line, is stored in a memory, wherein, from the sensor signals of the sensor units, each evaluation unit determines the direction in which another vehicle emitting light by means of its controllable light source is located, wherein, to determine the direction, each evaluation unit comprises a means for determining the maximum of a fit function, wherein the parameters of the fit function are determined by an optimisation, i.e. by minimising the sum of the squared deviations, i.e. distances, between the fit function and the value pairs generated from the measured values of the sensor units and their associated angular distances, wherein a respective means for determining the distance from one vehicle to another vehicle determines a measure for the distance to the other vehicle from a greatest detected light intensity value, wherein each light source sends out modulated light and each evaluation unit determines the amplitude of the modulation signal and uses it as the detected measured value of the relevant sensor unit, i.e. as the light intensity value detected by the relevant sensor unit. wherein each vehicle comprises a controllable light source and sensor units, wherein the sensor units of each vehicle are suitable for receiving light emitted by the controllable light source of another vehicle, wherein each vehicle comprises a respective evaluation unit for evaluating the sensor signals, wherein each sensor unit is arranged on the particular vehicle in a manner spaced apart from one another along a curved and/or domed surface, and has an orientation of which the angular distance from a direction set on the vehicle, in particular the direction of travel during travel in a straight line, is stored in a memory, wherein, from the sensor signals of the sensor units, each evaluation unit determines the direction in which another vehicle emitting light by means of its controllable light source is located, wherein, to determine the direction, each evaluation unit comprises a means for determining the maximum of a fit function, wherein the parameters of the fit function are determined by an optimisation, i.e. by minimising the sum of the squared deviations, i.e. distances, between the fit function and the value pairs generated from the measured values of the sensor units and their associated angular distances, wherein a respective means for determining the distance from one vehicle to another vehicle determines a measure for the distance to the other vehicle from a greatest detected light intensity value, wherein each light source sends out modulated light and each evaluation unit determines the amplitude of the modulation signal and uses it as the detected measured value of the relevant sensor unit, i.e. as the light intensity value detected by the relevant sensor unit.