Device for determining a fuel consumption behavior of a driver of a vehicle for at least a section of a distance a vehicle is traveling, wherein said section is constituted by at least one uphill slope followed by a downhill slope, wherein the device comprises: - means for determining a parameter value α representing the end of said uphill slope, - means for determining a parameter value β representing the beginning of said subsequent downhill slope, - means for, during said section, determining a parameter value γ representing a parameter for a measure taken by the vehicle driver, wherein the said measure constitutes a measure for reducing take off of a positive motor torque, characterized in that said determination of a parameter value α representing the end of said uphill slope comprises a determination of a point α where the inclination of the uphill slope falls below a predetermined angle or where the driving resistance of the vehicle falls below a predetermined value; said determination of a parameter value β representing the beginning of the said downhill slope comprises a determination of a point β where the inclination of the downhill slope exceeds a predetermined angle or where the absolute sum of the driving resistance of the vehicle exceeds a predetermined value; said parameter value γ representing said measure for reducing a positive motor torque is constituted by a determination of a point γ at which said measure for a reduced take off of a positive motor torque is performed; and in that it further comprises: - means for, based on the quotient d 1 / d, with d being the distance between the points α and β and d 1 being the distance between the points γ and β, determining a consumption parameter value representing a fuel consumption behavior of the driver of said vehicle for said section. - means for determining a parameter value α representing the end of said uphill slope, - means for determining a parameter value β representing the beginning of said subsequent downhill slope, - means for, during said section, determining a parameter value γ representing a parameter for a measure taken by the vehicle driver, wherein the said measure constitutes a measure for reducing take off of a positive motor torque, characterized in that said determination of a parameter value β representing the beginning of the said downhill slope comprises a determination of a point β where the inclination of the downhill slope exceeds a predetermined angle or where the absolute sum of the driving resistance of the vehicle exceeds a predetermined value; said parameter value γ representing said measure for reducing a positive motor torque is constituted by a determination of a point γ at which said measure for a reduced take off of a positive motor torque is performed; and in that it further comprises: - means for, based on the quotient d 1 / d, with d being the distance between the points α and β and d 1 being the distance between the points γ and β, determining a consumption parameter value representing a fuel consumption behavior of the driver of said vehicle for said section. - means for, based on the quotient d 1 / d, with d being the distance between the points α and β and d 1 being the distance between the points γ and β, determining a consumption parameter value representing a fuel consumption behavior of the driver of said vehicle for said section.