DOLLY

A dolly adapted to be coupled to a semitrailer, where the dolly comprises a first steerable axle and a second axle provided with a drive unit, and where the dolly comprises a fifth wheel and a drawbar, where the dolly further comprises a cover having a front compartment in front of the first axle, where the front compartment comprises a first radiator and where the cover comprises a first air opening adjacent the drawbar. In this way, a dolly with integral cooling is provided.