Has anyone else noted a big increase in noise pollution from car and motorbike exhausts over the last year or so? The vehicles may be tuned that way in manufacture but I would presume there are legal decibel limits. Alternatively, the tuning may be modified subsequently or baffle plates removed. The excess noise is not confined to obvious sports models; many innocuous saloon cars or bikes exhibit it too. Drivers increase the noise by trying to beat their personal 0-60 speeds away from traffic lights or while overtaking. The police don't seem bothered.
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