What does this traffic sign indicate?

You answered correctly. This traffic sign marks the **end of a 30 km/h speed zone**. It means the previously enforced maximum speed limit of 30 km/h is no longer valid. After passing this sign, you must follow the general speed limits or any new posted signs for the road. This sign does not indicate a minimum or recommended speed—only that the special 30 km/h speed restriction is over.

Knowing these zone-ending signs is important because it signals when you can legally drive faster, but always pay attention to new signs that might introduce different speed limits ahead.