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Do you have a link handy for this?
Since it started in 2015, accidents are down 50%, but deaths up 90%. This analysis leaves a lot to be desired. I didn't see per-capita stats (Seattle had massive growth during a lot of those years), and we don't really enforce traffic laws at all anyway, so IDK what to think without digging in further.
The interesting question is power-to-weight, which was (apparently) a direct result of EPA regulations that were enacted in 1975. The below article, which I found from a search engine copying your question and looking at a few results, is an interesting read.
Ignoring all that, the actual question would be: how have car sizes and weights changed _in this region_ during this period of time. Sizes and weights of cars in brasil have little bearing to accidents in the PNW, for example.
https://carbuzz.com/new-vehicles-bigger-heavier-more-powerfu...
Sorry that I wasn't clear, that's exactly what I meant. I'm curious because it makes absolutely no sense that a safer urban design with separation of grades for cyclists, lowering speeds through design and engineering rather than just updating speed limit signs, would see an increase in deaths. Nowhere else in the world where those were implemented has had that effect, the Netherlands being the prime benchmark for it.
So there's something else at play, average car sizes in the USA are much larger than Europe (and most of the rest of the world), the urban road design is not changed that much: perhaps stroads just got new speed limits and were left at that, instead of narrowing them, adding trees and other obstacles that naturally makes driving slower and more cautious, so on and so forth.
There's also the added issue that American driving standards for a licence are incredibly low since it's kinda required for you to have a driver's licence to exist and have a life in the majority of the country.
Relative to what?
Second, actually trying to verify if you were right or not, you’re not. Germany, for example, has driving tests similar to the state of maryland in the US.
You are, unfortunately, incorrect and ignoring research/critical thinking skills.
Critical thinking skills? Gimme a break, lol, driving standards, on average, in the USA are abysmal in comparison to these countries. Traffic data don't lie, no matter if tiny Maryland has better standards, it doesn't improve the average.
Also, how exactly have you verified this, I'd like to see the sources, thank you.
it’s hard to isolate the effect size of policy, covid happened, car weights changed, policing may have decreased, US drivers may have driven differently, population size, etc.
As a visitor (periodically throughout the whole timespan) it's seemed to me like there's massive growth in population in the metro area and more densification inside the Seattle downtown area. Tough to tell what geography this exactly captures. Assuming the numbers are valid, I do wonder if there's a significant demographic or exurb shift, where older drivers became a higher proportion of all drivers where they already lived, and a bunch of others either stopped entirely or moved outside the city boundaries.
If memory serves, I feel like there's also a tendency to accidentally end up committed to a toll bridge crossing by getting stuck on an exit/on ramp off one of the highways, which might make people panic and bail at the last second erratically, but that idea seems a bit farfetched
I don't just mean assholes who do what they want. People just don't give a crap about others on the road at all anymore. A lot of folks who probably think they're driving "safe" are just driving selfishly slow and not following the law(super late blinkers, failing to move predictably with traffic, braking in traffic long before entering a turn lane).
It's definitely worse nowadays. I can think of plenty of reasons why. But really I think our society, generally, has started to reward selfish behavior. Or at least not punish it nearly enough to deter it's spread.
This article has SF pedestrian deaths by year: https://www.sfchronicle.com/projects/2026/pedestrian-fatalit...
For Portland you need to check their police news archives, I couldn't find a dashboard. Here are the data from 2016 and 2024: https://www.portland.gov/transportation/vision-zero/document... (13 pedestrian deaths), https://www.portland.gov/transportation/vision-zero/document... (22 pedestrian deaths). The population growth was 9% between 2016 and 2024.
I don't have an explanation for these increases, and there are no good papers that explore this in depth. I need to write a meta-research paper: "On the lack of research on urbanism-related policy failures".
Enforcement didn't work because people won't follow the law anyway or engineering didn't work because people tried to drive through the obstacles or approach them with the same speed and smashed/smooshed more?
And if the problem was in enforcement in the first place, then why do all the engineering that actively worsens the traffic?
And there are also other facts that point out to Zero Vision being the case. Cities that did not go all-in on this program seem not to have experienced the rise in deaths. I have not researched this in detail, because quantifying the level of road sabotage is tricky. But it definitely _looks_ like it's the case just based on subjective observations.
What didn't?
> and resulted
Correlation is not causation.