I think the worst accident was the 1955 Le Mans Accident that killed 85 spectators.[1]
It looks like the years (between 1952-1980) of 1956, 1963, 1965, 1972, 1976 and 1979 are noteworthy because those are the 6 of 28 years when a driver wasn't killed[2]...
Yep, but car racing today is orders of magnitude safer than it was decades ago, especially in F1. An insane amount of money, research and regulations has been poured into increasing safety by the FIA.
F1 tracks, cars, suits and helmets today are so safe that even on violent crashes at >45G[1] or flaming infernos[2] of gasoline and lithium, the driver can walk out of the wreck with a just a broken rib or a burned hand, whereas in the past that would have meant certain death or at least being crippled for life.
I think the worst accident was the 1955 Le Mans Accident that killed 85 spectators.[1]
It looks like the years (between 1952-1980) of 1956, 1963, 1965, 1972, 1976 and 1979 are noteworthy because those are the 6 of 28 years when a driver wasn't killed[2]...
[1] https://en.wikipedia.org/wiki/1955_Le_Mans_disaster
[2] https://en.wikipedia.org/wiki/List_of_Formula_One_fatalities