Slide Chart, Your Danger Zone

This small slide chart allows motorists to find their “danger zone,” that is to say the distance an automobile will move forward in feet after a motorist wishes to stop, as this varies with the speed of the car (ranging from 20 to 80 miles per hour) and the reaction time of the driver (ranging from 1/4 second to 1 second). The total stopping distange or “danger zone” ranges from 29 feet to 469 feet.
The envelope and slide are of white paper, printed in red and black. A mark on the front, the back and one side of the slide reads: COPYRIGHT, 1935, AETNA CASUALTY & SURETY CO.
Currently not on view
Object Name
mathematical table
date made
ca 1935
Aetna Casualty and Surety Company
Physical Description
paper (overall material)
overall: .5 cm x 15 cm x 7.8 cm; 3/16 in x 5 29/32 in x 3 1/16 in
place made
United States: Connecticut, Hartford
ID Number
nonaccession number
catalog number
Science & Mathematics
Mathematical Charts and Tables
See more items in
Medicine and Science: Mathematics
Mathematical Charts and Tables
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Oscar W. Richards
Additional Media

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