Control Device and Method for Controlling Traveling Speed of a Vehicle

A control device and a method for controlling traveling speed of a vehicle for the purpose of maintaining a vehicle speed equal to or lower than a pre-set downhill speed (v). The method comprises simulating a vehicle speed profile for an upcoming road section if braking at a pre-identified power level (P, P, P) would currently be requested, thereby obtaining a predicted maximum vehicle speed (v, v, v) and a predicted time until a vehicle speed equal to or within a pre-selected interval (I) of the pre-set downhill speed is reached. The method further comprises, if the predicted maximum vehicle speed is equal to or below the pre-set downhill speed (v) and the predicted time is below a preselected threshold time limit, requesting braking at the pre-identified power level or at an adjusted power level.