By some distance, the research Emissions Analytics published in early 2020 claiming that tire particulate wear emissions were 1,000 times worse than exhaust emissions generated the most feedback of any subject we have tackled so far " feedback that was a mixture of surprise and scepticism. The headline conclusion we draw now is that, comparing real-world tailpipe particulate mass emissions to tire wear emissions, both in normal' driving, the latter is actually around 1,850 times greater than the former. Yes, in normal driving the ratio is almost double the previous figure for aggressive driving.
Quoting such ratios, however, needs careful interpretation. The fundamental trends that drive this ratio are: tailpipe particulate emissions are much lower on new cars, and tire wear emissions increase with vehicle mass and aggressiveness of driving style. Tailpipe emissions are falling over time, as exhaust filters become more efficient and with the prospect of extending the measurement of particulates under the potential future Euro 7 regulation, while tire wear emissions are rising as vehicles become heavier and added power and torque is placed at the driver's disposal. On current trends, the ratio may well continue to increase.
Drudge Retort Headlines
Trump Appears to Fall Asleep (Again) in Court (37 comments)
Silicon Valley Billionaire Tried (Again) to Close Beach Near his Home (36 comments)
Trump Pledges to Scrap Offshore Wind Projects on 'day One' (34 comments)
Pathetic Trump Already Trying to Weasel Out of Debating (26 comments)
Trump Suffers Huge Vote Against Him in Maryland, Nebraska (24 comments)
Speaker Johnson Shills for Trump Outside Courthouse Trial (23 comments)
Grandson says Carter is 'coming to the end' (19 comments)
Trump and Biden Upend the Presidential Debates (18 comments)