What vehicles are generally exempt from the ban on road traffic in "environmental zones"?

In German environmental zones, specific vehicles are exempt from traffic bans to protect air quality while allowing essential services and agriculture to function.

Agricultural and forestry tractors are permitted because they play a critical role in rural economies and agricultural land management. Ambulances on duty are exempt since they provide necessary medical services and must be able to respond quickly in emergencies.

The combination of these two exemptions reflects a balance between environmental protection and practical needs in society. Understanding these exemptions is crucial for ensuring compliance with local regulations while recognizing the roles these vehicles play in community well-being and safety.