How can you reduce the noise generated by your motor vehicle?

You answered correctly by selecting both driving at a low engine speed and using tyres with a low rolling noise. These measures effectively lower the amount of noise your vehicle produces. Driving at a low engine speed reduces engine noise because higher revs result in more sound. Tyres designed for low rolling noise create less sound as they move across the road surface. Removing the air filter insert, however, does not decrease noise; instead, it can actually increase engine noise and is not permitted. For noise reduction, focus on moderate driving habits and choosing low-noise tyres.