The sign "Exemption from the traffic ban according to § 40 paragraph 1 BImSchG (in conjunction with sign 270-1) - green badge" indicates that vehicles displaying a valid green badge are exempt from certain traffic restrictions, particularly those related to emissions or environmental zones.

In Germany, many cities have established environmental zones (Umweltzonen) where only vehicles that meet specific emissions standards can enter. The green badge is granted to vehicles that are classified as low-emission, indicating they meet the necessary environmental criteria.

If you see this sign, it means that vehicles with the green badge are allowed to drive in areas that may otherwise be restricted to reduce pollution. However, it's important to ensure that the badge is properly displayed on the vehicle, and that the vehicle genuinely complies with the emissions standards required for the exemption.