Until now, passenger cars before getting permission to sell were tested in the laboratory
conditions in order to determine the amount of harmful gas compounds emission and average fuel
consumption. However, studies have shown that, during real driving, emission results significantly
differ from those obtained in the laboratory. For this purpose, the European Commission has
created a new procedure for conducting of driving cycle WLTP (World Harmonized Light-Duty
Procedure) taking into account road test (Real-Driving Emissions, RDE). The article presents
selected results of pollutant emissions research using the HORIBA OBS 2200 road analysis system.
