The speed limiter fitted in a bus should limit its maximum speed to:

This question is about the level to which the speed limiter in a bus should limit the speed. It should limit it to 100 km/h - answer B.

The Road Traffic Act requires vehicles of categories M2 and M3, that is buses, to be fitted with a type-approved speed limiter that limits their maximum speed to 100 km/h, fitted by the manufacturer or by a body authorised by the manufacturer. The value of 90 km/h (answer A) applies to lorries of categories N2 and N3, and 120 km/h (answer C) does not appear in this provision. The speed limiter does not change the speed limits: an ordinary bus may drive on a motorway at no more than 80 km/h, and on an ordinary road outside a built-up area at no more than 70 km/h. Adjusting or disconnecting the speed limiter is not allowed.

Legal basis: Art. 66 para. 1a of the Road Traffic Act (Prawo o ruchu drogowym)