Though the times and cars have changed, the danger is the same. Check out this illustration of the damage a car could do to your fragile body at 20, 40, and 60 miles an hour.
The manual “Safe and Sane Use of Highways”, published in 1934, offers a basic introduction to this and other concepts we take for granted today. Windshield wipers, jay-walking, crosswalks – these were relatively new in the 1930s. So was getting hit by a car traveling 60 mph.
Is it enough to make you slow down when you see people walking around?