The Block Signal

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• 1926
• 0 hr 59 mins
• Action & Adventure, Drama

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This generally historic drama depicts the railroad issue of the day circa 1910-1915, when railroad signals were changing from the moving arm semaphore to simple color lights (red and green) and railroads learned many engineers were red-green color blind. This shows people losing their jobs and even a head-on collision, depicting the effect of these historic railroad improvements.