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Sound, smoke and smell
Page 40
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New lorry regs forecast in Government's 'fight against pollution'
• "The Minister of Transport is now discussing with the motor manufacturing industry a phased and precise programme of noise reductions which can be progressively implemented during the 1970s. . . The 1970 permitted noise level for lorries is 89 dBA, for motorcycles 86 dBA and for cars 84 dBA. Some further reductions are possible during the next few years using existing techniques. The Government's long-term aim, in which they expect to obtain the willing co-operation of the industry, is to reduce the levels for lorries to 80 dBA and for cars to 75 dBA. In judging the effect of this, it should be noted that a reduction of 9 or 10 dBA means a reduction of one half in the noise which people subjectively experience.
"The Government also intends to include a noise check in the present annual checks on heavy vehicle maintenance, and thereby to ensure that bad maintenance does not allow a vehicle which started quiet to become noisy as it ages." The foregoing intentions are expressed in a White Paper presented to Parliament last week— "The protection of the environment—the fight against pollution".
In a section, "Pollution of the air", it is stated that the Minister of Transport has worked Out with the diesel engine manufacturing industry a British Standard (BS /AU 141) which is now being met by most new vehicles and which permits less smoke from heavy vehicles than any standard in operation in Europe. The Minister will shortly lay regulations to make this Standard obligatory for all diesel engines installed in new vehicles, and he is now discussing with the industry and the BSI a tightening of the Standard which will in due course still further reduce the permitted intensity of smoke.
Referring to the annual hgv test, the White Paper says that the Government is now developing a method of using instruments to check smoke emissions and as soon as this is developed, the regulations will be amended so that instruments can be used instead of the present visual check.
It is also the Minister's intention shortly to lay statutory regulations to require that all new vehicles sold in this country should be fitted with a crankcase breathing device which will feed emissions back through the air intake into the cylinders.
Cmnd. 4373, HMSO, 3s.