In my opinion, traffic accidents are more dangerous because they happen many times, throughout the years and will happen many years from now. Covid-19 is a disease but it had its ups and down, now being not that aggressive anymore, not killing that many people.
However traffic accidents will forever be here, and will forever kill many people.
So, in conclusion, i think traffic accidents are more dangerous because they are more common than Covid-19 cases, at the moment.
HOPE I HELPED YOU <3