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In this book a psychologist and an advertising man have collaborated to present a study of the factors involved in driving, with a view to determining the causes of accidents and to make recommendations for their prevention. Sixty per cent of all the accidents occur on the highways, 40 per cent in traffic lanes. The authors insist that most accidents are the result of human limitations. On the highway, most accidents occur through the driver's ignorance of human vision. In traffic lanes the accidents are the result of delayed responses. The analysis of the relationship of vision to accidents is convincing. When a person is driving at the rate of from 40 to 45 miles an hour the only point at which he gets a clear picture of the foreground is about 80 feet ahead of the car. At 50 miles an hour, ruts and breaks in the road are
Safe Driving: Human Limitations in Automobile Driving. JAMA. 1937;109(1):73. doi:10.1001/jama.1937.02780270075027