We require noisy EVs for safety, but let’s stop the real killers: SUVs & gas
Much has been made of the supposed danger to pedestrians from quiet electric cars, to the point where the government now requires noisemakers on each EV model. But if we really want to save pedestrians, and everyone else, we need to target the actual culprits: big, pedestrian-killing SUVs and trucks, and the associated pollution they create.
The noisemaker rule has finally gone into effect, after being tweaked and pushed back over the course of several years. This has resulted in noisier EVs, each with its own noise (some worse than others), in the name of pedestrian safety.
NHTSA’s rule was based on a DOT analysis that showed hybrid vehicles to be 17% more likely to be involved in a pedestrian crash, when accounting for situational factors and vehicle age, though this analysis only included hybrid vehicles up through the 2011 model year. The law mandating the DOT to study and propose a rule for this dates back to 2010, when only a handful of electric cars were on the road in the US.
When implementing the noisemaker rule, NHTSA estimated these noisemakers will save 32 lives over the lifecycle of a single model year’s fleet. The rule requires noisemakers for EVs and hybrids when operating under 19 mph, the safest speeds for pedestrians. It does not require noisemakers or minimum decibel levels for gas-powered vehicles, even if those vehicles are equipped with engine stop/start or other technologies, which make the engine quieter or silent in certain situations, e.g., when slowing down and approaching an intersection, a place pedestrians are likely to be.
And as of February of this year, NHTSA has even opened an investigation into whether every electric vehicle since 1997 should be retrofitted, at some cost and difficulty, in order to comply retroactively with the noisemaker rule, in a way that virtually no other vehicle regulation has ever been implemented. The petition itself acknowledges there is no data yet showing relative danger from EVs that are not equipped with noisemakers.
What’s really deadly to pedestrians? SUVs
But there’s another common vehicle type that is 45% more likely to kill pedestrians: “light trucks,” a classification that includes SUVs and pickup trucks. Though “light” might be an odd word to apply, given that today’s SUVs are as large as literal tanks.
Light trucks are more deadly to pedestrians because they are larger and have higher hoods, resulting in decreased pedestrian visibility for drivers (with pedestrians obscured behind hoods, or behind other vehicles that are taller than the pedestrians or cyclists on the other side of them) and more deadly pedestrian impacts.
Cars are required to have bumpers designed for pedestrian safety, but light trucks have a different set of requirements. This leads to light trucks impacting pedestrians higher on the body, which causes more injury to the torso and head than the legs, resulting in deadlier collisions when a light truck is involved.
So not only are they more likely to hit pedestrians, but more deadly when they do.
And in fact, pedestrian death rates have skyrocketed in the US recently, up around 50% in the last decade, reaching the highest point in 40 years. Not coincidentally, SUV sales rates have increased in the same time frame. More deadly vehicles on the road have resulted in more pedestrian death, with the growth in SUVs responsible for killing at least a thousand pedestrians as of 2019 – which is a lot more than 32. Pedestrian deaths continued to rise sharply after 2019, so that number is surely significantly higher now.
The rise of SUVs is not solely a matter of consumer preference. Automakers use light truck exemptions to get out of emissions and safety rules and make more money, and actively push consumers toward these vehicles (even though barely anyone uses them for their intended purpose). How can Americans buy wagons, or city cars, or hatchbacks, when everything on the dealer lot is an SUV?
But running over people isn’t the only way that SUVs are dangerous; the pollution they make is orders of magnitude worse.
Noise itself is deadly
The DOT’s analysis of EV pedestrian safety explicitly did not consider environmental noise as a confounding factor to its research.
In a world choked with noise pollution from combustion engine vehicles, it stands to reason that quieter vehicles would be harder to hear. But if the world were not choked with noise pollution, those quieter vehicles would no longer be too quiet, they would be the norm. In a quieter world, EVs aren’t “harder to hear” once the sounds they make are no longer masked by the pathetic belching of combustion engines. Lower noise levels is a benefit of EVs, not a downside.
Noise itself is incredibly deadly to pedestrians – or rather, to everyone. Noise, mostly from cars but also from other combustion engines (airplanes, small off-road engines, etc.), greatly increases the rate of heart attacks in noisy areas, negatively affects the health of hundreds of millions of Americans, and is responsible for 12,000 premature deaths per year across Europe. Some research shows noise pollution to be just about as deadly as vehicle crashes overall.
The government even knows this to be the case, and has for some time, as it established the Office of Noise Abatement and Control through Congressional acts in the 1970s. This office was intended to study and regulate environmental noise in the US, but was – in a phrase that should be common to people who study social ills – defunded by Reagan in the ’80s.
So since noise is deadly, and since noise itself contributes to the problem the NHTSA wants to solve (by making it harder to hear quieter cars), then why don’t we work on making less noise instead of more?
And then, there’s air pollution
And finally, air pollution is deadlier than all of the above. And air pollution overwhelmingly comes from combustion engines.
Outdoor air pollution kills over 4 million people globally per year (including 100-200K in the US) and shortens global lifespans by two years. The health and environmental costs of fossil fuels add up to $5.3 trillion globally per year.
Much of this pollution and fossil fuel use comes from gasoline-powered vehicles, with larger vehicles like SUVs consuming more fuel and emitting more pollution than smaller vehicles (and tremendously more than zero-emission EVs). Vehicle pollution results in 4 million new cases of childhood asthma per year, sentencing these children to a lifetime of health issues.
Which brings up the point that this pollution is often not killing the people who emit it. Not only are children harmed for a lifetime by this despite not having contributed to this pollution, but environmental damage is disproportionately felt by the poor and is disproportionately emitted by the affluent.
This disparity was recently pointed out by the LA Times, in an article which Tesla CEO Elon Musk criticized despite his company being one of the solutions to this problem (perhaps someone could remind him that he’s still CEO of Tesla?). We already have studies showing that more EVs means cleaner air (with each EV bringing ~$10K in societal health benefits), and we know that more gas cars means dirtier air – and more deaths.
So if you want to reduce deaths, I’ve got a proposal
We know that:
- Big cars kill more pedestrians by running them over.
- Noisy cars kill more people by increasing stress, and also cover up the noises made by cars that operate at a more appropriate volume.
- Big, noisy combustion engines kill a whole lot of people by choking them to death with pollution.
Which means these noisemakers aren’t the most effective solution to the problem they are meant to solve. More effective solutions involve doing something about noise, and about air pollution, and about big pedestrian-murdering vehicles.
This also means that EVs aren’t the only answer. While a Hummer EV, the least-efficient EV, uses about as much energy as a Toyota Prius, one of the most-efficient gas-powered vehicles, the Hummer EV also takes up more space and causes more pedestrian danger. The trend toward SUVs threatens to eliminate emissions reductions from electrification, and while electric SUVs are still vastly efficient than any gas car, they are less efficient than smaller electric cars.
If we truly want to make the world safer for pedestrians, there are a lot of things that we can do outside of noisemakers. A discordant symphony of clown-car sound effects at every intersection isn’t going to be the big change that makes the world more walkable or cyclable.
To do that, we should put cars (or transit) on the road that don’t hog as much space, that don’t obscure pedestrians and cyclists from the view of other drivers, that don’t make the world too loud to think straight, that don’t choke everyone with stinky exhaust. These steps will give people more confidence to use their legs to make use of these more efficient, healthier, cheaper transportation methods – once these myriad benefits are no longer overshadowed by the problem of huge land yachts increasingly trying to murder them.
So here’s a modest proposal for society: If every EV needs a noisemaker for the safety gains mentioned above, then we should also take every “light truck” off the road for even more safety. If we’re thinking about making the EV rule retroactive to 1997, then we can make the much more effective SUV rule retroactive to 1997 as well. Do the latter, and you can have the former.
And if you won’t, then it’s not really about safety, is it?
Featured photo by Charles Edward Miller
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Yadea, which has claimed the title of the world’s largest electric vehicle maker for seven years running, has just announced a new electric motorbike powered by the company’s innovative HuaYu sodium-ion battery technology.
Yadea has long dominated the electric two-wheeler and three-wheeler market globally, but has generally relied on both lithium-ion and lead acid batteries to power its vehicles in different markets.
The newly unveiled electric scooter uses Yadea’s recently introduced sodium battery technology, offering what the company says is outstanding performance in range, charging speed, and safety. Using the HuaYu Sodium Superfast Charging Ecosystem presented by Yadea, the battery can reach 80% charge in just 15 minutes, providing greater convenience for riders.
Yadea’s sodium battery has successfully passed more than 20 safety tests, many focusing on its resistance to fire and explosions under extreme conditions like punctures and compression.
Yadea’s new sodium battery offers an energy density of 145 Wh/kg and a lifespan of up to 1,500 cycles at room temperature, with the company rating it for a five-year useful lifespan. It also includes a three-year warranty for added assurance.
With excellent low-temperature capabilities, the battery retains over 92% of its discharge capacity at -20°C, making it well-suited for colder climates.
Sodium batteries present major advantages
Most electric vehicles used in the West, especially electric two-wheelers, rely on lithium-ion batteries for their high energy density. But sodium-ion batteries offer many benefits over traditional lithium-ion batteries.
Sodium is an abundant element on the planet and is easily accessible, unlike lithium, which is concentrated in specific regions and often expensive to extract. This abundance can make sodium-ion batteries cheaper to produce, reducing costs for EV manufacturers and potentially making electric vehicles more affordable.
Lithium mining also has environmental challenges, such as water depletion and habitat destruction. Sodium, on the other hand, can be sourced from seawater or common salts, offering a more sustainable and environmentally friendly option.
Sodium-ion batteries are less prone to overheating and thermal runaway compared to lithium-ion batteries. This makes them inherently safer for electric vehicles, reducing the risk of fires and improving consumer confidence in EV technology.
Sodium-ion batteries perform better than lithium-ion in cold climates. Lithium-ion batteries struggle with capacity retention in freezing conditions, but sodium batteries maintain efficiency, making them ideal for EVs in colder regions.
Sodium batteries still have challenges to overcome
While sodium-ion batteries are promising, they currently have a lower energy density than lithium-ion batteries, meaning they store less energy per unit of weight.
For EVs, this translates to shorter driving ranges for the same-sized battery. That’s especially important in electric two-wheelers like motorbikes and electric bicycles, which don’t have much extra space for storing bulky batteries.
However, advancements in cathode materials and battery architecture are quickly closing this gap, which Yadea has demonstrated. These sodium-ion batteries still can’t match the energy density of lithium-ion batteries, but as they continue to improve their energy density, the technology’s other major advantages provide encouraging signs for larger adoption in the industry.
Yadea’s status as a major electric motorbike maker also means that its adoption of sodium-ion battery technology could help lead the entire industry towards this battery chemistry, bringing safety and performance benefits along with it.
Last year I had the unique opportunity to visit one of Yadea’s global manufacturing sites.
To see inside the company’s massive and highly-automated manufacturing processes, check out the video below!
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At CES2025, the impressively built-out John Deere exhibit was all about automation. Autonomous job sites, autonomous farms … but it was this new, battery electric, autonomous lawn mowing robot that stole the show.
The self-driving Deere mower robot was positively dwarfed by the giant farm machinery surrounding it, but it continues to prove that humans will pack bond with anything as more than one burly-looking and grizzled man asked what its name was. (It’s Howard. I’ll fight you.)
For his part, Howard packs a 21.4 kWh battery pack that runs a suite of electric motors that includes a drive motor and three cutting blade motors spread across a 60 inch cutting deck – but it’s not the electric motors that make John Deere’s little robot mower cool, it’s the way it works.
See, instead of using “just” GPS data or “just” repeating a pre-recorded run, Howard can do something in between. The way it was explained to me, you would ride the stand-up mower around the perimeter of the area you wanted to mow, select a pattern, then hop off, fold up the platform, and let it loose. Howard mows just the way you would, leaving you to focus on edging, planting, or (let’s face it) schmoozing with the clients.
It’s exactly the sort of help landscapers are looking for.
But that should come as no surprise, of course. John Deere, perhaps more than most companies, knows its customer. “We’ve been in the turf business for 60 years — it’s a core part of Deere,” says Jahmy Hindman, chief technology officer at John Deere, explaining things beautifully. “The work that’s being done in this industry is incredibly labor intensive … they’re not just doing the mowing work. They’re doing the tree trimming, maintaining flowerbeds and all these other jobs. The mowing is table stakes, though, for them to get the business. It’s the thing they have to do in order to get the higher value work.”
Tim Lewis, lead engineer with the commercial automatous mower, told Lawn & Landscape that the industry in general has a high turnover rate as well, making it difficult to hang to people who know where one job ends and another begins. “There’s a lot of nuances it takes to do these jobs effectively,” he explains, “so “Autonomy can help with that.”
The John Deere autonomous commercial mower (there’s no snazzy alphanumeric, yet) leverages the same camera technology as other Deere autonomous machines, but on a smaller scale (since the machine has a smaller footprint). With two cameras each on the front, left, right, and rear sides of the little guy, he has a 360-degree view of the world and enough AI to lay down a pattern, avoid an obstacle, and shut off if it thinks it’s about to mow down something (read: someone) it shouldn’t.
John Deere will have Howard on display through tomorrow at CES in the LVCC’s West Hall. If you’re in town, be sure to go say hi.
John Deere CES2025
SUOURCE | IMAGES: John Deere; Electrek.
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