The aerodynamic drag of road vehicles is dominated by pressure drag due to flow separation. Cosidering the importance of road transport for both passengers and goods, reducing the aerodynamic drag can have a significant impact on global fuel consumption and greehose gas emissions. Results are presented for active flow control approaches applied to different vehicle models. The goal is to modify the separated flow field downstream of the vehicle such that the pressure drag is reduced. The control approaches comprise active blowing, suction, or a combination of both. The control is applied to the Ahmed body, using different slant angles (25, 35, and 90 degrees). The investigations are carried out using Large-Eddy simulations.