5 ms·
Big improvements, but keep in mind that air and tyre resistance are the loudest aspects of driving at even moderate speeds.
by fire_lake 2y ago
Big improvements, but keep in mind that air and tyre resistance are the loudest aspects of driving at even moderate speeds.
- alan-hn 2y agoAnd that pollution of tire degradation is one of the biggest sources of particles from cars
- guntars 2y agoDon’t forget the brakes. When the rotors get worn down, where did they go?
- MVissers 2y agoNot a big issue with evs, most use regenerative breaking.
- 01HNNWZ0MV43FF 2y agoAs do hybrids! Even mild hybrids like those new pickups
- shiroiushi 2y agoThe rotors aren't the problem, the pads are. Rotors are just cast iron, and they wear very slowly compared to the pads.
- georgeburdell 2y agoDo you have a source for that claim? Typically I see breakdowns by chemical formula
- uolmir 2y agoFor example, https://www.theguardian.com/environment/2022/jun/03/car-tyres-produce-more-particle-pollution-than-exhausts-tests-show https://www.theguardian.com/environment/2022/jun/03/car-tyre... https://www.washingtonpost.com/climate-environment/2023/07/09/tire-brake-tailpipes-emissions-pollution-cars/ https://www.washingtonpost.com/climate-environment/2023/07/0...
- pwatsonwailes 2y agoThis. People always underestimate how much noise rolling resistance of tyres plays in the sound profile of traffic. Electric cars are worse under 50mph, basically because they're heavier.
- bojan 2y agoElectric cars start and accelerate noiselessly - both very common activities in the inner city driving.
- Spivak 2y agoThe parent's point is that the engine isn't the largest contributor of noise. At low speeds the engine noise dominates, at "high" (meaning normal driving speeds) speeds the tire noise dominates. Go listen to a highway and see if you can hear the engines over the wooshing.
- Retric 2y agoCars in cities rarely travel quickly, spending lot’s of time stopped at traffic lights right where people cross the street or stuck in traffic. The squeal of a worn out brake pads is largely mitigated by regenerative breaks which increase brake lifespan.
- bobthepanda 2y agoThere are a lot of highways in American inner cities.
- Retric 2y agoThose are frequently Highways in name only. If people are doing 2-3 mph in stop and go traffic it might as well have stop lights. Thus the frequent use of bypasses so people on long trips can actually get someplace quickly even if the distance increases.
- jlund-molfese 2y agoMaybe inside of a regular electric car, but the worst noise pollution in cities comes from cars and motorcycles with modified exhaust and incessant honking. Cars are loud and that's a problem by itself, but a car with a bad driver is exponentially worse than one with a normal driver.
- noahtallen 2y agoThat’s one part, but the other massive part is noise from freeways and the baseline white noise from faster roads, where most of the noise comes from tires. EVs are not better (and typically worse since they’re heavier) — the only way to fix it is 1. No freeways in city centers. 2. Fewer cars. 3. Noise barriers. 4. Asphalt that reduces tire noise (uncommon in North American cities, where concrete is used to improve the lifespan). I can’t use my balcony in a downtown city center because the baseline tire noise from the highway is so loud, and that’s without the obnoxious exhaust
- ravetcofx 2y agoYup,Electric cars aren't quieter at all compared to movement I.C.E cars. Speeds need to be lowered to 35km/hr or lower.
- jameshart 2y agoIn residential and downtown areas, the sound is going to be dominated by engine idling, pulling away, and low speed cruising. It's ridiculous to argue that electric motors aren't a massive improvement in all of these cases.
- npteljes 2y agoMust really depend on the speed, because the experience I have with ICE vs electric at Europe city speeds, electric vehicles seem practically silent.