Yet (from your own source) in 2020 and 2021, when so many people started working from home for the first time, per capita motor vehicle fatalities
went up 7.1% and 10.5%, respectively; the worst two-year increase since 1945-1946. The rate then
went down in 2022 as so many people returned to the office.
My own experience early in the pandemic was that daily 15 MPH traffic jams turned into empty highways that suddenly allowed unimpeded 65+ MPH travel. For someone who still had to go into the office quite a bit, it was lovely. But it seems that it also encouraged a lot of riskier, higher-speed driving.