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- Hand-Operated Traffic Signal, circa 1930 - Traffic officers manually operated early traffic signals. A control lever on this 1930 model activated the different lights. Beginning in the 1930s, most traffic lights were operated automatically, freeing officers for other duties.
- circa 1930
- Collections - Artifact
Hand-Operated Traffic Signal, circa 1930
Traffic officers manually operated early traffic signals. A control lever on this 1930 model activated the different lights. Beginning in the 1930s, most traffic lights were operated automatically, freeing officers for other duties.