Seattle traffic deaths: https://wtsc.wa.gov/dashboards/fatalities-dashboard/ - select "Seattle" in the city filter and "Pedestrian" in the filter below.

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".