If you drive a truck with a gross vehicle weight of over 3 t, what's the maximum speed at which you can drive on a motorway?

In the photo, you are driving on a motorway - at both edges of the roadway, near a flyover, there are D-9 "motorway" signs, and ahead of you there is a lorry with a tarpaulin. When driving a lorry with a maximum permissible mass of over 3.5 t, you may drive here at no more than 80 km/h - answer B.

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. The 140 km/h limit, which people associate with motorways, applies to passenger cars, motorcycles and lorries up to 3.5 t - your lorry may drive at 80 km/h, and the same limit applies on an expressway. The answer 70 km/h would apply to an ordinary road outside a built-up area, and 90 km/h does not match any limit for a lorry over 3.5 t. Be careful with the speed limiter: in a lorry over 3.5 t it is set to 90 km/h, but it is not what sets the limit - the law allows you to drive at no more than 80 km/h.

Legal basis: Art. 20 para. 3 point 2 letter a of the Road Traffic Act (Prawo o ruchu drogowym); § 48 para. 2 of the Regulation on road signs and signals