Traffic-light signalling and operation to a double red light. Tianjin in the People's Republic of China has two very special systems of traffic lights, in use since : One system is where there is a horizontal bar in a specific colour, with the colour changing and the bar shrinking. The shrinking bar indicates the time remaining in that colour. The colour itself is either red (stop), yellow or green (go). A blinking green one-third-full bar means "reduce speed now", and a blinking yellow full-bar indicates "proceed with caution". When lights of this system turn from green to red, the diminishing green bar will flash
USS Starboard Unit (1918) Marsh on 5 March 1919. USS Starboard Unit (1918) USS "Starboard Unit" was a United States Navy patrol vessel acquired in 1918 but never commissioned. "Starboard Unit" was built as a civilian motorboat of the same name. On 5 November 1918, the U.S. Navy acquired her under a free lease from her owner, Joseph W. Marsh, for use as a section patrol boat during World War I. World War I ended on 11 November 1918, six days after "Starboard Unit"s acquisition. No longer needed for naval service, "Starboard Unit" never received a section patrol (SP) number and was never commissioned.