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
Container ship first coordinate is the "BAY", which starts at the front of the ship and increases aft. The second coordinate is "TIER", with the first tier at the bottom of the cargo holds, the second tier on top of that, and so forth. The third coordinate is the "ROW". Rows on the starboard side are given odd numbers and those on the port side are given even numbers. The rows nearest the centerline are given low numbers, and the numbers increase for slots further from the centerline. Container ships only take 20 foot, 40 foot, and 45 foot containers. 45 footers