Which vehicles are you allowed to overtake where you see this traffic sign?

This traffic sign indicates a general prohibition on overtaking cars. Specifically, it means that overtaking passenger cars and similar vehicles is not allowed in this area. However, the restriction applies mainly to cars and similar four-wheeled vehicles.

You are still allowed to overtake smaller vehicles like motorcycles without a sidecar because they are not covered by this sign’s ban. Motorcycles with a sidecar or cars are included in the no-overtaking rule.

So, the rule of thumb is: This sign forbids overtaking cars and equivalent vehicles, but motorcycles without a sidecar can be overtaken unless other signs or conditions forbid it.