> Again I don't disagree, but if it were really so easy we would have done it decades ago. It's not like this is a new idea. It was done decades ago… like in t

> Again I don't disagree, but if it were really so easy we would have done it decades ago. It's not like this is a new idea. It was done decades ago… like in the Netherlands. As he explains in the video (@43:28), Utrecht and "Fake London" (London, ON, CA, where he grew up) have similar populations (300K vs 400K), and at one point were about equally car-focused. But one city deemphasized car use and the other continue to emphasize it. Similarly Amsterdam switched focus and now is a poster child for active transportation: * https://www.fastcompany.com/3052699/these-historical-photos-show-how-amsterdam-turned-itself-into-a-bike-riders-paradise https://www.fastcompany.com/3052699/these-historical-photos-... * https://exploring-and-observing-cities.org/2016/01/11/amsterdam-historic-images-depicting-the-transition-from-cars-to-bikes/ https://exploring-and-observing-cities.org/2016/01/11/amster... Paris seems to have begun the process: * https://momentummag.com/paris-cycling-numbers-double/ https://momentummag.com/paris-cycling-numbers-double/ * https://www.cntraveler.com/story/biking-cycling-in-paris-france https://www.cntraveler.com/story/biking-cycling-in-paris-fra... In contrast, many US cities are enacting policies and street designs that make things car centric (discussed @34:16) and hostile towards humans. Contrast that with designs that don't hinder humans as much: * https://www.youtube.com/watch?v=1ZUZA76L09M https://www.youtube.com/watch?v=1ZUZA76L09M > Who cares about "proportion?" Absolute quantity is what matters here. If there is X dB of noise, and (say) 80% of it is produced tire-road interaction, there is a floor that it cannot go below. And if "More traffic = more transportation services provided" is desired as you stated above, the proportion reduced by aerodynamic improvements will be eaten by by more vehicles on the road, for no net gain. And you'll still have non-noise pollution like tire and brake dust.