All of the details are here:
Prius Fatalities 20012007
Quote:
The Prius fatality rate of 0.64 per 100 million miles is less than half of the NHTSA 1.371.51 fatalities per 100 million miles for the years 20012007. This is based upon the annual Prius sales from 20002007 minus an overly high estimate of 3% Prius lost per year; an annual usage of 15,000 miles per Prius per year; and 75 prorated deaths of the 124 fatalities from 111 fatal accidents including Prius and nonPrius vehicles. A more conservative accounting of Prius contributions, a count of Prius participation by accident, gives an even lower rate, 0.55 Prius fatalities per 100 million miles.
. . .

If a Prius and another car are engaged in a twocar accident, the Prius gets 50% of the credit. So initially, I just calculated the ratio of all Prius and nonPrius vehicles in accidents to prorate the deaths. This gave a prorated, 74 deaths due to the existence of the Prius in the accident. But then I noticed some accidents were just single car, Prius accidents.
I went back and recalculated the deaths per accident prorated by the Prius percentage. Much to my surprise, it came even lower, 0.55 Prius fatalities per 100 million miles.
The web page lists all Prius involved, fatal accidents from 20012007. It also shows how I calculated the number of Prius on the road from the annual Prius sales minus a worst case, 3% loss per year, and accounting for only half of the miles for a car sold in the first year of service. Thus our Prius skeptics have a problem, the facts and data are unkind to them.
Bob Wilson
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2019 Std. Range Plus Model 3  134 MPG3  2014 BMW i3REx  117 MPGe, 39 MPG
JuiceBox 40 Pro (240 VAC, 40 A), KHONS portable (120240 VAC, 1232 A)
Retired engineer, Huntsville, AL (
five times AutoPilot saved.)