Try reading before you reply.

“Speeding accounts for nearly one-third of all fatalities on our roads and puts everyone at risk, including people in other vehicles, pedestrians, cyclists, motorcyclists and people with disabilities,” Acting Administrator Carlson said. [Emphasis mine, dude]

Feel free to click on the link in my comment. In there, there’s even a link to the data they draw the conclusions from.

Pedestrians are especially but not exclusively susceptible to cars and speed differences, but all persons involved in accidents fare worse with increased speeds. https://news.ua.edu/2005/11/ua-traffic-safety-study-shows-relationship-between-speed-and-deaths/ it’s a bit older, but it says chances of fatality double every additional 10mph over 35.