Street-lamp (1) comprising a supporting member (2), equipped with two or more conventional lighting units (3), and one or more fog light units (4), fastened to said supporting member (2) at a distance from the ground (7) not less than the maximum height of a truck trailer, said fog light units (4) being dimensioned and arranged such that beams of light (5) projected from said fog light units (4) form angles comprised from 0 to 90 degrees upwards with respect to a plane parallel to the ground (7) and passing through the relevant light source. <IMAGE>
