Stop when you see this sign. This is the new insignia plate the Bureau of Prohibition has adopted for use by prohibition agents in stopping suspected automobiles. In the photograph, from left to right, are; Prohibition Administrator Ames Woodcock, H.M. Lucious, secretary of the Automobile Club of Maryland, and Ernest M.Smith, vice- president of the A.A.A.

This photograph, titled Stop when you see this sign. This is the new insignia plate the Bureau of Prohibition has adopted for use by prohibition agents in stopping suspected automobiles. In the photograph, from left to right, are; Prohibition Administrator Ames Woodcock, H.M. Lucious, secretary of the Automobile Club of Maryland, and Ernest M.Smith, vice- president of the A.A.A., was taken in 1930 in Prohibition. It is part of the Library of Congress collection documenting American life during the 1920-1939 era.

Photographs from the Library of Congress, public domain.