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
Academic dress of the University of Nottingham partially or fully lined with light blue silk which is the University colour and trimmed with a ribbon the colour of which indicates the graduate's faculty. All members of the University (from undergraduate to Doctor to Divinity) wear a black square cap except for doctors in full dress for whom the regulations now specify a round black velvet bonnet. Lately, such persons have been observed wearing a cord around the brim of the bonnet though these are not stipulated in the regulations. These cords are claret or scarlet for those with substantive doctorates (depending on the colour of the dress