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
Ship Shoal Light Ship Shoal Light The Ship Shoal Light is a screw-pile lighthouse located in the Gulf of Mexico southwest of the Isles Dernieres off the coast of Louisiana. It is currently abandoned. Ship Shoal (known as Ship Island Shoal in early maps) is a bar running east-west in the open waters of the gulf. The Louisiana state legislature petitioned congress for a light to be erected on this hazard in 1848, but instead of a fixed tower, a lightship was provided instead. This vessel, the "Pleasonton", was named after Stephen Pleasonton, who was in charge of the lighthouse service at the