If you drive a truck with a gross vehicle weight of over 3.5 t, what's the maximum speed at which you can drive once you go past this sign?

In the photo, you are driving on a single-carriageway road, and on the right there is sign D-43 "end of built-up area". When driving a lorry with a maximum permissible mass of over 3.5 t with a trailer, beyond this sign you may drive at no more than 70 km/h - answer A.

The Road Traffic Act states that the speed limit for a vehicle combination or a vehicle other than a passenger car, a motorcycle and a lorry up to 3.5 t outside a built-up area is 80 km/h on a motorway, an expressway or a dual carriageway with at least two lanes for each direction of traffic, and 70 km/h on other roads. The Regulation on road signs and signals states that sign D-43 marks the exit from a built-up area, so the 50 km/h limit ends here. The road in the photo is a single-carriageway road with one lane in each direction, and you are driving a vehicle combination - so 70 km/h applies, not 90 km/h as for passenger cars. The answers 60 and 50 km/h are too low. A combination with a trailer is long and heavy, so you need much more space for overtaking than a passenger car travelling at the same speed.

Legal basis: Art. 20 para. 3 point 2 letter a and b of the Road Traffic Act (Prawo o ruchu drogowym); § 58 para. 3 of the Regulation on road signs and signals