§ Mr. BoswellTo ask the Secretary of State for Transport if he will give the average noise emitted by(a) a private car, and (b) a heavy goods vehicle proceeding at their respective national motorway speed limits; and by how much these increase as a result of infractions of the speed limit by (i) 10 mph and (ii) 20 mph respectively.
§ Mr. AtkinsAssuming a high speed road in good condition, the following are the estimated average noise levels received at a point 7.5 metres from the centre of the vehicle and 1.2 metres above the ground.
Average noise levels dB (A) at vehicle speeds Vehicle type 60 mph 70 mph 80 mph 90 mph Private car 83 85 87 89 Heavy goods 90 92 93 95