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 (D), 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 (D); - 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 (L) substantially transversal to the forward direction (D), to view graphical features of the vehicle , and includes a matching camera , oriented in a backward direction opposite to the forward direction (D), 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 (D), 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 (D); - 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 (L) substantially transversal to the forward direction (D), to view graphical features of the vehicle , and includes a matching camera , oriented in a backward direction opposite to the forward direction (D), to view the positioning target element . <EOS>