Noise is also a contaminant. The tyre roar from Q7 and X5 at speed is painful in my ears as a pedestrian or cyclist. But the drivers neither know not care in t

Noise is also a contaminant. The tyre roar from Q7 and X5 at speed is painful in my ears as a pedestrian or cyclist. But the drivers neither know not care in their insulated metal boxes. And how many years of life are lost due to inadequate sleep as a result of 24/7 road noise? Perhaps we need a regulation that interior vehicle noise needs to match external noise measured at kerbside.