3 ptsD,D1Official number: 13061
At what speed is the bus driver allowed to continue driving past this prohibition sign?

Explanation
Correct answer: 50 km/h when towing a trailer regardless of the GVM of the combination.
The D-42 "built-up area" sign indicates entry into an area where the standard speed limit is 50 km/h. According to the Road Traffic Act, this is also the maximum speed for a bus towing a trailer, regardless of the maximum authorised mass of such a vehicle combination.