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Air pollution fell substantially as Paris restricted car traffic

washingtonpost.com

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Re: Air pollution fell substantially as Paris restricted car traffic

#451

Post by otterley »

looofooo0 wrote: post #434
Reason077 wrote: post #241

Earlier quoted context omitted.

EVs have very low brake wear because you simply aren’t using the friction brakes at all most of the time. A lot of EVs even have smart “blended” brake pedals that preferentially apply regen braking when you press the pedal. Only in particularly hard stops will the friction brakes get used. An easy way to test/observe this is simply to check for wear on the brake pads of EVs compared to combustion vehicles of similar…

This little friction break usage is actually something which manufacture need to consider. They need to activate once in a while to stop rust and other problems.

They almost certainly do. For example, our Chevy Volt (EV + gasoline engine range booster) puts the engine through a maintenance phase if you haven’t used the engine in a few weeks, and will force the engine to consume any fuel left in the tank if it hasn’t been refilled in several months.

Re: Air pollution fell substantially as Paris restricted car traffic

#452

Post by user777777 »

nashashmi wrote: post #387
davidw wrote: post #13

Earlier quoted context omitted.

Given that tires produce a lot of particulate matter, even EV's contribute to pollution significantly.

Wouldn’t that mean bicycles contribute to air pollution?

Yes cars are bikes

Re: Air pollution fell substantially as Paris restricted car traffic

#453

Post by ianleighton »

carlosjobim wrote: post #121
usrusr wrote: post #36

Earlier quoted context omitted.

Lighter cars, really, that's it. Make vehicles that match the transportation case in question instead of palaces on wheels that carry battery sized for solving some once in a year use case. And/or make them go slower.

It would be incredible if somebody invented a light car, that would transport one or two people and some groceries. Maybe with two wheels instead of four to take up less space. Hmmm why has nobody invented this?

+1 for Cargo bikes, but otherwise if your bike infrastructure sorta sucks, the Citroën Ami and counterparts from Fiat etc are pretty common in European cities… easy to park too.

Re: Air pollution fell substantially as Paris restricted car traffic

#454

Post by user777777 »

gniv wrote: post #167
onlyrealcuzzo wrote: post #6

How much of this has to do with the policies highlighted - removing 50k parking spots, adding bike lanes and green spaces - and how much has to do with cars having better exhaust? How much less cars are on the road today vs then? The charts and title make it look like there's no cars in Paris anymore. That's not the case, at all.

Like another commenter in this thread I suspect it's mostly due to banning cars with Crit'air > 2.

No, it’s not just that. There’s a reduction in traffic. Traffic is the biggest cause of pollution. Even if the exhaust is “ clean “ (it’s not) there’s also tire dust and brake dust

Re: Air pollution fell substantially as Paris restricted car traffic

#455

Post by user777777 »

bri3d wrote: post #12

Worth noting that 50-60% of passenger cars in France are diesel, but Paris have been gradually banning older higher emission diesels (Crit’air 3, 4, 5) from Paris. Banning cars outright also works, of course, but I suspect a lot of the reduction can be attributed to getting particularly bad diesel cars out vs. the limited areas where cars are entirely restricted.

It’s not just that. Car exhaust will never be 100% clean. It’s reduction of cars. Sorry.

Re: Air pollution fell substantially as Paris restricted car traffic

#456

Post by rmnwski »

impossiblefork wrote: post #288
10-1-100 wrote: post #16

Earlier quoted context omitted.

Also worth noting that with modern emissions standards (and transition to EVs), over 50% of handful particulates come from tires, brakes, road surface wear, and resuspended dust: https://www.oecd.org/en/publications/non-exhaust-particulate... I don't think there's any healthy level of private cars coexisting with humans in a city, without even considering the more immediate harms from crashes, etc.

What if the cars were made really light? Four bicycle wheels, as many batteries as you can safely put on something supported by four bicycle wheels, an aerodynamic CFRP bubble for the driver etc? I think such a vehicle can be better than one thinks, with acceptable range, acceptable particle emissions, acceptable noise levels; and I think they could easily get to 80 km/h safely.

You just don’t want to crash with something like that. If all cars were build like that it might even be ok but try crashing into a normal sized car…

Re: Air pollution fell substantially as Paris restricted car traffic

#457

Post by robocat »

kspacewalk2 wrote: post #303
robocat wrote: post #296

Earlier quoted context omitted.

Greens seem to deceive in the same way as green-washing except with greener deceptions (whereas green-washing is capitalists pretending to be green). Example: a report on the cost-benefit of using bicycles, that comes out with a fantastic positive number for introducing a cycle lane. Except the number depends on a monetary estimate of the benefits to society for health improvements. I'm sure the health improvements e…

It would be great if you could cite the report you're talking about, so we can judge for ourselves whether you're steel-manning or straw-manning its methodology.

I found it:

https://economics.acadiau.ca/tl_files/sites/economics/resour...

" Thesis submitted in partial fulfillment of the requirements for the Degree of Bachelor of Arts with Honours in Economics Acadia University, 2013" biased and poorly balanced.

  As far as can be determined, no cost-benefit analyses of bicycle facilities have been carried out for locations in Canada.
Maybe says more about the searching skills author than the state of cost-benefit analysis in Canada - but it sounds bad.

  The daily benefits from one person switching from car travel to bicycle travel for commuting are estimated to be $2.14.
Most of that 2.14 "savings" is car ownership and maintenance costs, which is bullshit because they say elsewhere you need a car for the days your can't cycle. Nice double counting eh?

Plus the internal+external "health ben." added up to be about equal to vehicle ownership costs.

See the "analysis" bias?

Perhaps an Acadia University Honours in Economics is toilet paper.

Re: Air pollution fell substantially as Paris restricted car traffic

#458

Post by saltysalt »

stouset wrote: post #430
saltysalt wrote: post #377

Earlier quoted context omitted.

"Airparif has raised an undisclosed amount of funding from 1 Grant (prize money) round on Jun 01, 2014 from European Union." Source: https://tracxn.com/d/companies/airparif/__7FZ-JDeTGVeYNdb_2-...

Who, exactly, should be funding air quality measurements within the European Union?

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