A vehicle headlight measurement system instrumentation structure, comprising: - a base unit; - a support structure connected to the base unit; - a vehicle calibration assistance structure, which is carried by the support structure and includes a headlight aiming device, positioned in a forward direction, defined as the vehicle's forward travel direction towards a service area in which the vehicle is positioned; the headlight aiming device configured to facilitate alignment or calibration of a headlight of the vehicle; - a positioning target element, having a surface facing the service area and provided with a predetermined graphical feature, the positioning target element being supported by the support structure and oriented in the forward direction; - a positioning device, configured for aiding a relative positioning between the vehicle, positioned in the service area, and the vehicle calibration assistance structure; - a processing system, wherein the processing system is operatively coupled to the positioning device to receive data therefrom and includes a processor configured with instructions to evaluate data received from the positioning device to determine measurements including at least a spatial relationship between the vehicle calibration assistance structure and the vehicle, wherein the positioning device is spaced from the support structure, characterized in that the positioning device includes an optical device, oriented in a lateral direction substantially transversal to the forward direction, to view graphical features of the vehicle, and includes a matching camera, oriented in a backward direction opposite to the forward direction, to view the positioning target element. - a base unit; - a support structure connected to the base unit; - a vehicle calibration assistance structure, which is carried by the support structure and includes a headlight aiming device, positioned in a forward direction, defined as the vehicle's forward travel direction towards a service area in which the vehicle is positioned; the headlight aiming device configured to facilitate alignment or calibration of a headlight of the vehicle; - a positioning target element, having a surface facing the service area and provided with a predetermined graphical feature, the positioning target element being supported by the support structure and oriented in the forward direction; - a positioning device, configured for aiding a relative positioning between the vehicle, positioned in the service area, and the vehicle calibration assistance structure; - a processing system, wherein the processing system is operatively coupled to the positioning device to receive data therefrom and includes a processor configured with instructions to evaluate data received from the positioning device to determine measurements including at least a spatial relationship between the vehicle calibration assistance structure and the vehicle, wherein the positioning device is spaced from the support structure, characterized in that the positioning device includes an optical device, oriented in a lateral direction substantially transversal to the forward direction, to view graphical features of the vehicle, and includes a matching camera, oriented in a backward direction opposite to the forward direction, to view the positioning target element.