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by lolinder
762 days ago
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I guess "large" is subjective. 1-5% is the ballpark I have in my head based on experience, which qualifies as "large" to me when I get passed by thousands of cars a day. The hard numbers I'm aware of are about motorcycles, which have much higher rates of illegal modifications than other vehicles. This source documents a bunch of other sources, with estimates ranging from 40-70%: https://noisefree.org/sources-of-noise/motorcycles/ |
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