Control room of a full-scale test conducted in the early 1960s in Michigan to evaluate the possible uses of closed circuit in traffic surveillance
Source: National Proving Ground for Freeway Surveillance Control & Electronic Traffic Aids. Television Equipment for Traffic Surveillance, 1962. Hagley Library.
Traffic monitoring in an English city, presented in a volume on industrial television published in GDR
Source: Loos, Fritz, and Helmut Schmidt. Industrielles Fernsehen. VEB Fachbuchverl., 1960.