Municipalies decide where environmental zones should be introduced. Environmental Zone Class 1 (current Environmental Zone)In Class 1 environmental zone, all light vehicles can drive. For heavy vehicles, access to Class 1 environmental zone are according to current regulations. Environmental Zone Class 2Class 2 environmental zone requires passenger cars, light buses and light trucks. To drive in Class 2 environmental zone, vehicles with both petrol and diesel engines must belong to the Euro 5 emission class or better. As of July 1, 2022, the requirements for cars with diesel engines are tightened. From that moment on, diesel cars will meet Euro 6 requirements for driving in Class 2 environmental zone. Environmental Zone Class 3Class 3 environmental zone sets the highest requirements. Only electric vehicles, fuel cell vehicles and gas vehicles may drive with the addition that for gas vehicles Euro 6 applies. In the case of heavy vehicles, charging hybrids may also run if the vehicle meets the Euro 6 emission requirements.