Even a small change in the crash speed can have a dramatic impact on the outcome.
Additional sources for data:
City of Madison 2021 Crash Facts Report
City of Madison 2020 Crash Facts Report
City of Madison 2019 Crash Facts Report
Wisconsin Department of Transportation and Wisconsin Traffic Operations and Safety Laboratory at UW-Madison Community Maps Crash Data
Wisconsin Health Data on race/ethnicity related to fatalities
Dane County Ped/Bike Crash Study