The Hydrid transmission strongly reduces the fuel consumption and the related CO2-emission of a vehicle, especially during the city part of the NEDC. The Hydrid transmission does what any efficient drive train should do: realise a high efficiency of the total drive train, independent of the vehicle speed. In the end, the fuel consumption of a vehicle should reflect the operation of the vehicle. Driving on the highway then results in a higher specific fuel consumption, simply because the drag increases at higher velocities of the vehicle.