Method for measuring the luminance of a road surface, wherein: - luminance measurement means having a certain measurement cone α are provided, - the luminance measurement means are placed relative to the road C at a certain height h and are oriented in a certain measurement direction D relative to the location of the observer, - the luminance measurement means are used to measure the luminance of a certain region Z of the road C determined by the certain measurement cone α, the certain height h, and the certain measurement direction D, at a certain distance d from the location of the observer, where, in combination: - luminance measurement means are selected that have a measurement cone α chosen to be larger than normal, meaning greater than 2 arcminutes in the vertical plane and 20 arcminutes in the horizontal plane, these luminance measurement means are placed relative to the road C at a height h chosen to be lower than normal, meaning less than 1.5m, and they are oriented relative to the location of the observer in a direction D suitable for measuring the luminance within a certain region Z located at a shorter distance than normal relative to the location of the observer, meaning less than 60m; - the luminance measurement means are moved over and along the road C by means of a measurement vehicle supporting these means and, as they are moved, they are used to measure the luminance of the certain region Z of the road C corresponding to the chosen measurement cone α, the chosen height h, and the chosen measurement direction D, and characterized in that - at least during the measurements, stabilization means are used, in the form of a supporting trolley resting on the road C on wheels or a similar arrangement and comprising orientation stabilization means able to stabilize at substantially constant and predefined values the height h and the measurement direction D. - luminance measurement means having a certain measurement cone α are provided, - the luminance measurement means are placed relative to the road C at a certain height h and are oriented in a certain measurement direction D relative to the location of the observer, - the luminance measurement means are used to measure the luminance of a certain region Z of the road C determined by the certain measurement cone α, the certain height h, and the certain measurement direction D, at a certain distance d from the location of the observer, - luminance measurement means are selected that have a measurement cone α chosen to be larger than normal, meaning greater than 2 arcminutes in the vertical plane and 20 arcminutes in the horizontal plane, these luminance measurement means are placed relative to the road C at a height h chosen to be lower than normal, meaning less than 1.5m, and they are oriented relative to the location of the observer in a direction D suitable for measuring the luminance within a certain region Z located at a shorter distance than normal relative to the location of the observer, meaning less than 60m; - the luminance measurement means are moved over and along the road C by means of a measurement vehicle supporting these means and, as they are moved, they are used to measure the luminance of the certain region Z of the road C corresponding to the chosen measurement cone α, the chosen height h, and the chosen measurement direction D, and - at least during the measurements, stabilization means are used, in the form of a supporting trolley resting on the road C on wheels or a similar arrangement and comprising orientation stabilization means able to stabilize at substantially constant and predefined values the height h and the measurement direction D.