It has been found that higher speeds aren’t as dangerous as that one guy who refuses to go along. The accidents start happening as people encounter him and start shifting lanes to go around him. In the past “going with the flow” meant doing 65 in a 55. Today, however, on Long Island, going with the flow means going 75/80 in a 55...
You’re only considering highways.
I see roadside memorials all over the place on non-highways for people who were going to fast.