Neon Signs Identify Police Patrol Cars (Apr, 1939)
Neon Signs Identify Police Patrol Cars
Police cars assigned to the park districts of Chicago, Ill., are now fitted with roof-top neon signs so that motorists may identify them on the road at any time during the day or night. Within park areas, the police automobiles travel at legal speeds so that drivers may spot them and judge their own speed accordingly. Even in heavy fog, the rooftop signs are easily visible, as shown in the photograph reproduced
at the left.