If you drive a truck with a gross vehicle weight of over 3.5 t in a built-up area, can you drive at a speed of 70 km/h once you go past this sign?

The visible B-33 'speed limit' sign increases the permitted speed, however, in a built-up area, this increase applies only to vehicles with a maximum authorised mass (MAM) not exceeding 3.5 tonnes. When driving a heavy goods vehicle with a MAM over 3.5 tonnes, you are still subject to the standard speed limit for a built-up area, which is 50 km/h.