HC Deb 12 December 1989 vol 163 c538W
Mr. Boswell

To 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. Atkins

Assuming 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

Back to