Tag: pedestrian fatalities

• The effect of front-end vehicle height on pedestrian death probability

  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.

  2024.02.12

• Optimizing for cars

  Vox recently profiled what they are calling the deadliest road in America — a certain section of US-19 running along the Gulf Coast of Florida. It is generally an 8-lane road — 9 at most intersections — and so as you might expect, it is place that was designed for cars.

  From 2017 to 2022, US-19 saw 34 pedestrian fatalities involving a car for every 100 miles. Indeed, this stat makes it the deadliest highway in the state of Florida for people on foot.

  The other telling stat for me is the road’s crosswalk spacing. This is a place that is lined with restaurants, hotels, and many other commercial uses, and yet the crosswalks are sometimes spaced miles apart.

  This kind of street scale is mind boggling for pedestrians. No one in their right mind is going to go out of their way a mile or two just to cross a road, and so it’s no wonder that people are jaywalking and that too many people are getting hit.

  I know that our tendency is to try and solve these problems with things like flashing lights, speed radars, and orange flags that people can unceremoniously waive as they cross the street. But at the end of the day, this is an urban design problem.

  Spaces that are optimized for cars are, by definition, not optimized for pedestrians. The choice is ours.

  2022.08.18