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Air pollution fell substantially as Paris restricted car traffic

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Re: Air pollution fell substantially as Paris restricted car traffic

#471
post #129
post #81

Earlier quoted context omitted.

That's the myth. Streetcars were actually torn up because busses were much cheaper, there was no conspiracy. The streetcars were also old and cold and ppl hated them. (I lived in a streetcar part of SF, and loved it, fwiw. But the only reason it's still there is a tunnel.)

Many other places just... upgraded the trams. You know, the less radical solution.

A bus is the least radical thing IMO, but yeah it took too long in most of USA to get some mass transit better than streetcars.

Re: Air pollution fell substantially as Paris restricted car traffic

#472

Earlier quoted context omitted.

It's a shame that riders of bikes and scooters in your city feel so unsafe riding on the road, that they are forced onto the sidewalks. Blame dangerous drivers and the lack of protected bike lanes though, not your neighbors who are just trying to arrive at their destinations alive. Pedestrian collisions with bikes versus collisions with automobiles are utterly incomparable both in number and severity. If that cyclist…

The problem is that most cyclists in my city have no idea about the basic of safety and how to evaluate risk. Most of them ride with headsets on, often noise-cancelling, no helmets and no reflectors. So I'm a bit dubious about the excuse "they are so scared". And even then, they can still walk instead of endangering pedestrians. As for your last paragraph, this is false; walking on the sidewalk is and should be safe:…

You need to develop infrastructure (bike lanes and paths) and a cycling culture (which comes with giving kids training in primary school). To give some examples how things work here:

- Most kids get 'traffic training' and have to do a theoretical and practical exam when they are about 10 or 11.

- Building a cycling culture makes car drivers more aware. If car drivers are also cyclists themselves, they are more aware of cyclists. Also, during driving lessons some techniques are practiced, like e.g. opening a door with your hand that is opposite to the door. By doing so, you automatically turn while opening the door, so you can see if any cyclists are passing. All of this makes cycling on roads (as opposed to pavements safer).

- Give bikes a lane, or even better a separate bike path. Only let cars and bikes share a street in low-speed (30 km/h) non-busy streets. Cars, bikes, and pedestrians differ so much in speed that they usually should not be on the same roads.

- Change your laws such that in accidents involving cars bikes or car pedestrian, the car driver always bares a certain amount of liability even if the cyclist/pedestrian is at fault. To a cyclist/pedestrian a car is like a bullet flying by. Putting more liability on the car driver makes them more careful.

- Design your cities so that cycling/walking is preferred. E.g. the city I live uses filtered permeability. As closer you get to the city center, the harder it becomes to get there by car, whereas you can get everywhere easily by bike or by foot. This fosters a culture where biking/walking is the norm, because you can get in different places faster by bike.

It works very well. I don't know of any pedestrians who were hit by a bike.

Typical predatory thinking of a toxic cyclist.

Please avoid the personal attacks and victim-blaming. I have also lived in a country that was not cycling-safe and usually the only way to avoid getting hit is to ride on the pavement (as most natives did). The problem is not the cyclist, but the miserable infrastructure for anything that is not a car.

[1] https://en.wikipedia.org/wiki/Permeability_(spatial_and_tran...

Re: Air pollution fell substantially as Paris restricted car traffic

#473

Earlier quoted context omitted.

But they are heavier. Not saying it offsets the effect but it's just not straight forward to assume either way.

In the US, the average car weight and the average EV weight are basically identical. (4300 pounds vs 4400 pounds). When you compare similarly sized models the EV tends to be about 10% heavier, but gasoline cars tend to be larger than EV's.

In the EU an average car is 1400 kg (3000 lbs), with most vehicles probably in the 1000-1200 kg range. We don't really want the average here, but the median - and we don't want to compare to the average EV, but to the equivalent EV - comparing an F150 to, say, a model 3 isn't right.

A BYD Dolphin, roughly sized like a VW Polo, is some 400kg heavier than the polo. A Polestar 2 is roughly 500 kg heavier than equivalent sized cars. In other words, something like 33% heavier.

Re: Air pollution fell substantially as Paris restricted car traffic

#474
post #38

Don't have to ban cars - the UK has adopted a speed limit of 20/30 mph in cities and I'm sure it helps. Surely helps with the noise and the safety

In the UK people consider "speeding" to be going 10mph or more over the limit. So 20/30mph really means 30/40mph, and in addition there are still many places with 40mph (50mph) roads going through.

Speed limit signs don't work. People will drive at whatever speed feels right and this is usually way above 20mph. What works is narrowing the roads. When the carriage way is barely wider than your vehicle it magically makes 20mph feel appropriate and 30mph seem fast (which it is). This has the bonus effect that larger vehicles feel it more, which is perfect considering they are the most dangerous and should be driven by trained professionals who are used to such tight spaces.

It essentially makes driving much more stressful, which is exactly what it should be. The problem at the moment is drivers get everything: big, wide, smooth roads, with the best drainage and grading; the easiest and most convenient mode of transport; but none of the responsibility. We need to shift the balance back. You can drive, but it's a big responsibility and if you fuck up the consequences are serious.

Re: Air pollution fell substantially as Paris restricted car traffic

#475
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.

Huh, imagine EVs that have removable add-on batteries that you'd only plug in for the longer trips.. Like the Thinkpads with the "bigger battery" humps: https://sm.pcmag.com/t/pcmag_ap/photo/l/lenovo-thi/lenovo-th...

I imagine semiautonomous trailers that would just tag along in the slipstream within cable range for distances beyond your daily. With computer-fast reaction to brake and steering inputs of the lead car. Those would universally be rentals that you change like the horses in pre-rail post networks.

Re: Air pollution fell substantially as Paris restricted car traffic

#476

Earlier quoted context omitted.

> ICE cars are most efficient at around 50mph ... when driven continuously without stopping, like a on cross country limited access highway. When driving in the places people live, with cross walks and stop signs and children playing outside requiring frequent slowing & stopping, there's no efficiency benefit from racing 0 to 50mph every block then slamming on the brakes, only to repeat for each block after.

I frequently drive through 20 mph areas with little stop start traffic. I rarely drive at busy times. There is nowhere in the UK I can think of that has had a 50 limit in my lifetime that requires frequent breaking. 20 mph limits are invariably reduced from 30.

Never been to Milton Keynes then? 70mph limit between roundabouts. Can think of countless other examples.

Re: Air pollution fell substantially as Paris restricted car traffic

#477

Earlier quoted context omitted.

One would also expect that EVs wouldn't emit that many particles from brakes since the brakes typically wear much more slowly than with ICE cars.

But they are heavier. Not saying it offsets the effect but it's just not straight forward to assume either way.

If you want to go into the details of this, for all the things people hve mentioned, you have to calculate the road wear done by trucks carrying fuels to stations every day. Electricity does not need the same regular road wear as ICE vehicles do.

Re: Air pollution fell substantially as Paris restricted car traffic

#478

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.

> What if the cars were made really light?

That is the best answer.

For a little while in the 80s (remnants of the fuel crisis of the 70s) this was the trend. Go light and then efficiency is guaranteed. Combine with a small efficient engine and that's the optimal solution. A CRX HF from 1988 could do 44 MPG, with an engine that compared to current fuel injection technology is very crude and inefficient.

I want to buy a car that is basically this CRX HF but with 25+ years of engine and materials improvements. It could easily be a 1500lb car getting 60MPG.

But, no. Manufacturers (to some extent forced by terrible government rules) have gone heavier and heavier and heavier and heavier. Which is worse in every possible way.

Colin Chapman had it right: simplify, then add lightness.

Re: Air pollution fell substantially as Paris restricted car traffic

#479
post #138

Earlier quoted context omitted.

And it's one of the biggest promoters of inequality. I am an European who studied at OSU in Columbus for a semester and it was absurd to me how on one side there was lots of work downtown, yet you could live 20 miles of it and it would take you two hours by public transport to get there, an odyssey. People without a car, insurance, poorer parts of the society were cut off from the job market for not having a way to c…

In the USA, the working poor generally don't work downtown, and it's really the industrial areas where there is awful transit service. So cheapo used cars are a must for these folks. There is some awful HN bias here where young healthy well-paid tech workers live in some boogie part of SF/NYC/Boston/etc and enjoy the "car-free lifestyle" (and I've been there), without any idea how the other half lives.

You are completely correct about the bias on HN against cars: that will change when they get older and have kids. Not everyone is a young single urbanite working remotely or downtown.

Re: Air pollution fell substantially as Paris restricted car traffic

#480
post #464

Earlier quoted context omitted.

Except that many European cities copied US cities in their development styles, and then later reversed them. So we absolutely do know how to reverse it. > But it is nice to live in the Mission and take the techbus to Mountain View and handwave all the hard trillion dollar problems and say let the poors eat cake. Which is effectively how these discussions seem to go. Every study shows that the poor are hurt the most b…

It's funny, seems like people had me pegged as some Suburb Guy, when that couldn't be further from the truth. (I have mostly walked the talk, which is more than I can say of some of the former Bike Guys I have known.) Anyway, I completely agree with much of this, just a couple nits: > Every study shows that the poor are hurt the most because of car centric development. Yes, the poor always lose out versus Hypothetica…

> It's funny, seems like people had me pegged as some Suburb Guy, when that couldn't be further from the truth.

I didn't, I read your comment. I think you are just haven't done the necessary level of research or you just have a doomer outlook.

> Yes, the poor always lose out versus Hypothetical Utopia.

But they are not comparing to Utopia, but rather the comparable situation where changes have been made. Or to the same city before and after some change.

Unless you are making the argument that no objective knowledge can exist, the research is pretty clear.

> I'm referring to reality as it exists in the current and near future where many many poor & middle-class people need cars.

Nobody is questioning that. Literally nobody. That why its called 'car centric design'. Who are you arguing against?

> You can't just take them away because of a dumb student-type notion that "cars are only for rich people".

Again, literally nobody is arguing that! You have constructed a complete straw man of urbanist.

The argument is to encourage policy that will make people want to live without cars in the future.

Unless you think, restricting parts of the city center or closing some urban highways is 'taking cars away', you are literally arguing against nobody.

> Yes, I would love to tell Silicon Valley how to zone, but even the popular governor is having trouble doing that.

Yes, all of my suggesting involve politics. And of course not all of them can be implemented practically depending on location. This is always true with literally any suggestion about anything political.

But your claim wasn't 'its politically difficult' rather your claim was 'nobody knows how'.

> We have that, but it doesn't actually help because it's mostly about building rail out to new suburbs where people can get into city center office jobs (and the rail agency can get tax money). In the meanwhile, we built an urban subway with 3! stations.

If be 'we' you mean California, yes there is one. And that is already a lot better then what many other places have. You might not think its enough, but it better then nothing. And the claim that it is bad because its only 'new suburbs' is also factually wrong as part of the rail plan you just had Caltrain electrification, and future improvement to existing rail Caltrain. I'm not an expert on California rail, but the claim that it serves 100% new subburbs is certainty false.

> Like I said, it's a trillion dollar problem, and there's no easy button. Just incremental improvements.

I have no idea why you are claiming its a 'trillion $' problem. That can be said about not doing anything at all too. When we are talking about the infrastructure of 300 million people (assuming we are talking US) then of course, any decision you make its a trillion $. But in that context 1 trillion $ also isn't that much.

And if you actually look at the research you will see that actually many of the suggestion I have SAVE MONEY. The idea that all of this cost unbelievable amounts of money is simply not true.

Lets go threw examples:

- Saver roads pay for themselves because accidents have a really high cost. And the new safer roads will decease avg speed, leaing to easier to maintain roads. In the US today there is a massive amount of overbuilding of incrastructure that simply isn't needed if you were builing roads according to modern scientific principles, rather then some book some engineer wrote in 1960s that just so happens to have been adopted as 'the standard'. And the principles aren't that hard or expensive to implement. This is a clear money safer. Think about all the idiotic lights the US uses at every intersection, each set of lights is expensive, sound road planning would eliminate many of these.

- Closing down urban freeways increases property taxes. Gives the city new land to redevelop and sell, or keep as parks. Also reduces maintenance burden on state level.

- Rezoning pays for itself many, many, many times over, its not even close.

- Increase parking price can raise money for the city. If you don't want to remove them. Removing them is very easy and cheap.

- Putting down protected bike lanes with simple concrete protection is very very cheap and tons of research shows that it is very beneficial. More people on bikes means less car, means less time wasted in traffic. It has also been repeatedly shown that it improves retail on those roads and it also improves property prices.

- Setting up pedestrian zones is also incredibly cheap. Literally a few concert blocks or at most a few bulliards that you can fold down for emergency access. Incredibly cheap, increases property prices and retail.

- Increasing prices on suberbia to reflect actual cost, raises money, rather then losing it.

- Redeveloping stroads is a bit more expensive, but I'm not proposing building anything new, but rather changing the way access and priority works. Cost money but not that much and in the long term it saves a lot of money.

- City buying and developing land does cost money, but since the new mixed use areas will be popular they can actually make a lot of money. Money for this can be raised by cities.

- Setting up a bus network is also really not that expensive. That is some amount of running cost, but if your buses have good priority lanes and are frequent you can cover a lot of the operation. This certainty not a 'trillion $' and each city can handle this themselves, like the do in most of the world. And again, this is increasing tax revenue along bus routes as has repeatedly been shown.

- All the revenue increases are doubly relevant if you switch from property tax to land tax.

The only thing that is at all expensive that I proposed is a long term rail plan. But in terms of your long term transportation plan, you have a lot of cost anyway. And rail is a better long term investment.

I formulate all of my points specifically so they were something cheap that can be done. I didn't propose building huge new parks, or huge metro systems. Or high speed rail. Or anything like that.

You can literally do 95% of what is needed by with paint, concrete blocks, a bunch of buses and bus drivers and a few legal chances. The city will actually increase its revenue a huge amount over time.

The current model of trying to support ever increasingly distant suburbs is what is actually bankrupting cities.

I suggest you look at the detailed research from Urban3. They clearly show how cities that have done many of the chances I propose, are good for the cities finances. In fact, some cities have implemented some of these changes specifically because they are out of money.

So please do not spread the idea that American cities can't change because its to expensive. That is the sort of thing far-right wing people spread, the whole 'we can't afford bike-lanes' nonsense.

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