Smoke emissions of diesel vehicles were measured using KD147 mode and the results were analyzed. The representative smoke value for the tested diesel vehicle is calculated by averaging five consecutive smoke measurement points which consists of a maximum smoke point over the KD147 mode, two points before the maximum and two points after the maximum with the measurement time interval of 0.25 second. To use the five points averaging smoke value as a representative smoke emission value for the tested vehicle has problem that it cannot include other several peak points during the KD147 mode driving. A new method for deciding a representative smoke value for the tested diesel vehicle was researched. Multiple smoke emission peaks over the KD147 were detected. The multiple smoke emission peaks are averaged for getting the representative smoke value for the tested vehicle.