This is a shocking report from Smart Growth America on traffic fatalities in the US. Since 2010, the number of pedestrians struck and killed has increased by almost 75%. As of 2022, this number sat at just over 7,500 fatalities per year:

Here are also the top 20 most deadly metro areas:

Not surprisingly, these hot spots tend to be in the south, as opposed to in older northern cities. And that's because these tend to be car-oriented places. As the name of the report suggests, they are "dangerous by design." If you optimize for cars, it means you're making trade-offs in other places.

Charts: Smart Growth America

The US Department of Transportation has just finalized a new vehicle safety standard that will require all light-duty vehicles to be equipped with a more advanced form of automatic emergency braking (AEB) by 2029. (Light-duty vehicle = pretty much all passenger vehicles, including SUVs and trucks.)

Now, most light-duty vehicles on the road today already have some form of emergency braking. What's noteworthy about this ruling is that it requires a more robust version. Some might say one that works. Specifically, it will need to work at much higher speeds and at night.

Most of the AEB systems in operation today don't really work at night -- basically at all -- and many have shown to be ineffective when it comes to stopping for humans.

This new standard will require vehicles to automatically brake at up to 90 mph when a possible collision with a car is detected and up to 45 mph when a possible collision with a pedestrian is detected.

This seems like a very good thing, especially given the persistent problem we are having with cars killing too many people. But how do we do it?

From what I have read, this new standard will be pretty challenging to meet without the use of long-range LiDAR, especially since night vision is a requirement. I find this interesting because, even though autonomy is taking a lot longer to arrive than most people anticipated, there's still meaningful progress being made.

Here's to hoping it saves a lot of lives.

We have spoken a lot about pedestrian fatalities over the years (here, here, and here are a few posts), and, if there is a general rule of thumb, it is that pedestrians are safer in dense urban environments where there are a lot of other people walking around.

But another important factor might be average vehicle size. Here is a recent study by Justin Tyndall that combined US pedestrian crash data with car sizes to come up with the effect of front-end vehicle height on pedestrian death probability. This is an important metric because larger/higher front-ends are more likely to fatally hit someone in their chest and/or head.

What was ultimately found was that a 10 cm increase in front-end height -- which is really not a lot -- causes a 22% increase in pedestrian fatality risk! Meaning that something as simple as reducing front-end heights could reduce pedestrian fatalities. By his estimation, a 1.25 m height cap would reduce US pedestrian deaths by about 509 people each year.

This is pretty interesting, especially considering that average car sizes seem to keep going up.