Image: A man in early twentieth century attire rides a bicycle around a plinth in the centre of an intersection. The words ‘Keep to the Left’ are painted on the sides of the plinth. Several early twentieth century cars are visible in the background
Black Diamond Corner, 1926. The second iteration of the second ‘silent cop’ stands in the intersection at image centre
Courtesy of/Photographer: 
Port Adelaide Council
Citation: 

Image courtesy of the State Library of South Australia, SLSA: B 28690/255, http://collections.slsa.sa.gov.au/resource/B+28690/255, Public Domain