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
Port Washington Light the previous light; however it is known that a fourth order lens was installed in 1870. This lens, at above the water, gave the light a range of . The 1859 building housed one keeper and his family. An office was on the first floor and a watch room on the second. Charles Lewis Sr. was the keeper from 1874 to 1880, when he died. His wife took over briefly, then his son Charles Lewis Jr. maintained Port Washington's lights for many years. With the dredging and enlargement of the harbor in the late 1800s, the Port Washington Breakwater Light